Best local spot open 24/7 for donuts! I have been going here for years and my dad actually put me on because he had been going here for years as well! I believe it's family owned and the Donuts always taste fresh and soft somehow some way. I came at 11PM and they were deep cleaning the outside and sweeping the inside, but the case of doughnuts was full. I was half expecting the donuts to be hard and stale since it's the end of the night but I bought a half dozen, went home, bit into it and was amazed - 10/10 doughnut. Highly recommend stopping by here, literally anytime you're in the area and craving a donut. read more

SK Donuts - Donuts - Donuts Near Me - Union City, California

Open 24/7 is already an automatic 5 star review The custard filled cronuts are not overrated! Go get some now! read more

A sweet tooth & donut lover's paradise! Came here as per my boyfriend's recommendation of the filled cronut. I enjoyed the custard filled cronut. Texturally these things were amazing. Lightly crispy with a luscious sweet cream. The jam filled ones weren't my favorite, as I thought the jam itself tasted a little ketchup-y. These cronuts are definitely in the sweet since they're coated in a sugar glaze. As someone who isn't the biggest sweet tooth, I wish they sold a version without the glaze. There was a small line when we went which went by quickly. Prices are super reasonable & it's convenient that they're open 24/7. Place itself looks very hole-in-the-wall and outdated. I have a feeling this spot is here to stay. read more

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Haven't been back in a while but unfortunately the donuts/cronuts aren't as good as I remember. The cronuts were overly coated with glaze and way too sweet. Also bring cash since they charge 50 cents for purchases under $10. read more

SK Donuts - Donuts Near Me - Union City, California

Craving donuts after visiting the Don Edward's wildlife refuge. Sk did not disappoint! Open 24/7. We got there at 3 pm. Donuts were fresh! Love that there is seating inside and out. We got a chocolate twist, maple old fashion, and cronut holes. All the donuts were so tasty! The cronut holes were mind blowing. Highly suggest these. I also got the Vietnamese iced coffee. It had a deep coffee flavor and was perfectly sweet. So good! Highly recommend this place. read more

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Some dude on Instagram sent us there based on his filled cronut holes review. We got both the custard and jelly. They are pretty good, bumping up to great (but not life-changing) after a visit to the air fryer. By the way, this isn't a "need to come early" place- they know they are in demand, so the keep making fresh ones. The plump apple fritter was tasty though a little greasy. My wife got a stomach ache from the old-fashioned (both original and maple), which I enjoyed. I mean, I enjoyed the donuts, not the fact that she got a stomach ache. Four star donuts, but an extra star for their service, which is fast to accommodate the line that snakes inside the store and out, the selection of meaty breakfast sandwich bagels that looked really good, no card surcharge, and the fact that they're open 24/7. read more

SK Donuts - Always judge a donut shop by its line- Maya Angelou - Donuts Near Me - Union City, California

Love how this place is open 24-7. Came in to pick up some of the Custard-Filled Cronut Holes. The crusted is very light and not too sweet at all. It is one of the best I have had!!! Picked up a sausage, bacon, and egg sandwich in a croisannt, not the best I have had but still good. Just like any other breakfast sandwiches. I would differently return for their donuts and the Custard-Filled Cronut Holes. They were pretty quick on making the breakfast sandwich. read more

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Came to SK donuts the other day and boy their stuff is FRESH! I didn't think much when I came in until I had their maple flavored donut. The texture was not hard and the maple is freshly glazed. The size is just like how you remember it growing up and I love it. It won't blow a hole in your pocket grabbing one of these, come and check it out. I'm giving it a 5 out of 5 and I will definitely come back when my cravings for donuts come again! read more

SK Donuts - Donuts Near Me - Union City, California

Anddd we're back! I think I've been here last week also lol. Decided to drop a quick review! This time, I got a dozen Cronut holes (as always) for myself. So yummy! Not too sweet! Can never disappoint. read more

SK Donuts - Dozen Cronut holes - Donuts Near Me - Union City, California

On 5/5/26, my husband bought 6 donuts w cream and 6 regular donuts. All the 6 donuts w cream has sour-spoiled cream smell and taste = rotten spoiled milky -vanilla custard! What a waste, paid extra to have cream, but tastes terrible! The regular donuts w no cream was ok. read more

The creamed filled mini cronuts are a must here. Filled fresh when ordered. $10 for a dozen but decent size. The custard isn't too sweet and the cronuts are fresh and taste good if you eat them the first day. They get soggy the next day and the outside glaze melts off. Glazed cruller was mid. Prices are a bit high for pink box donuts. I like that they are open 24 hours. Service was ok since whoever was working was not very friendly. She was a bit short and rude. I try asking a question regarding the custard donut holes vs cronuts and she seemed annoyed. read more

SK Donuts - Donuts Near Me - Union City, California

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Came here late night Saturday. One of my gym girlfriends sent me here when I asked her where she got the breakfast sandwiches from our potluck. The sandwich was bomb and perfectly portion size!! My friend got the maple donut which she really enjoyed. I wanted to try the mini filled cronuts, I tried both the jelly filled and the custard. I think the custard was good, but it needed more vanilla it was light in flavor otherwise good! I am very bias and love a good jelly filled donuts and this was it! The cronut was nice and flakey and the jelly was delicious! read more

Such a cozy spot with really tasty donuts and pastries the variety is great especially the cronuts a classic glazed favorite...although I chose the maple flavor Did you know that they're open 24/7, so you can satisfy those late night munchies. The price is fair and the service is fast. 12/10 letsss gooo‍ read more

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Great donut shop. Open 24/7, lots of parking, seating inside and outside, and friendly staff. I got the chocolate and glaze cronut, I wanted maple but they had no more the chocolate and glaze were super good so I couldn't even be sad about it. I also got Vietnamese iced coffee, actually liquid crack, tasted so good and had me pumped up the whole day. Looks like any regular donut shop and I love that it operates 24/7! read more

SK Donuts - Maple and glaze cronut Vietnamese coffee - Donuts Near Me - Union City, California

Friend recommended this donut shop. I have driven by this place a bunch of times and never noticed it until my friend told me. Their cronuts are delicious and their donuts are pretty good. I definitely recommend trying SK donuts as they are really good and very busy at times. I was surprised how busy they were. This is the only place that has cronuts. read more

SK Donuts - Cronuts and donuts - Donuts Near Me - Union City, California

I was randomly craving donuts and stopped by SK Donut on my way home after years of driving past it. I was greeted by the sight of a huge display of fresh donuts, and noticed that it was quite a small place. But there are a few tables inside that can seat 3-4 people each if you'd like to sit to enjoy your donuts. Ultimately I decided to go with an apple fritter and cinnamon crumb donut. The cinnamon donut was light and sweet, didn't feel too heavy at all. The apple fritter was one of the best I've had. I also ordered a Vietnamese coffee and thought it paired perfectly with my donut; not too sweet and not too strong. I can't remember the prices exactly but I do remember being so impressed by how affordable they were. I think the cinnamon was $2 and apple fritter was $3.50. Such a great deal especially because the apple fritter is huge and you could definitely split it with another person. I can't see myself going to Krispy Kreme again after this and would rather support this nice local family-owned business. Crazy that they're open 24/7 too. read more

SK Donuts - Apple Fritter - Donuts Near Me - Union City, California

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Always open - love their donut holes ($3/dozen) and cronut holes ($8/dozen). They have other specialty donuts like fruity pebbles and old fashioned, as well as savory food and drinks like Vietnamese iced coffee. As I like eating more bite sized things, their donut holes are best for me and always a 5/5 for both. This time especially it tasted super fresh and airy for both. It took about a minute for them to get both dozens in their own baggies. To be fair, I only got donuts. It's a donut shop and exactly the ambience you would expect. You can tell it's a local favorite as people stop by and chill there and the hours are accommodating. read more

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Just a quick update! We were again at Huong Sandwiches (they did a rename recently and a price increase eek!) so we were curious to see if SK Donuts had their apple fritter as we were influenced by TikTok. Parking here is pretty plentiful so it doesn't feel like we've ever struggled finding a spot. So we dropped by but it was the end of their day and they sold out probably because of their new found fame on TikTok. But still well warranted and glad they're getting more and more foot traffic so that they get their other donuts some love as they've been here for years/decades even. It's your typical donut shop look and feel. You know? Like they had a template for donut shops back in the day and just did that over and over again. So you see all the donuts and they have seats that line the outside of the space. Though we didn't end up getting our donuts, it's still a great donut shop. Definitely drop by and get some donuts, donut holes, and cronut holes! read more

SK Donuts - Donuts - Donuts Near Me - Union City, California

Donut 4.3 Service 4.8 Back visiting my FIL and wife getting a facial a few doors down, and I'm in the mood for a donut. Walking in on a Saturday around 10am and there's still a line for food and donuts (it's not just a donut shop!) waited a few minutes before one of gals was able to assist me: a cherry cruller and a chocolate raised, I could've ordered more but my wife's family are all diabetics; so I quickly paid and found a quieter area to eat my donuts. I noticed that both donuts were not glazed like some other shops, that a plus since their icing is sweeter than expected. The cruller was light and airy + soft and chewy, but the cherry icing was missing any hint of cherry flavor more like just pink (vanilla) icing. The chocolate raised was soft and light as well while the icing was more of a mocha / milk chocolate flavoring. Overall fast friendly service and with classic old school donuts that satisfied my craving! BTW they're also 24/7 read more

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I have to say this is one of my new fave donut spot along I-880! I don't get them often but when the crave hits, SK Donut & Cronuts hit the spot When it comes to donuts, I stick with the classics and seek a simple glazed, apple fritter, and if you have a maple glazed I'm good...so if you have a variation like a cronut, custard donut holes or one with bacon even better! Sadly, they don't offer one. Soft, fluffy and not overly sweet! Service friendly, quick and efficient. Nothing fancy about this spot. Plenty of seats for enjoying your breakfast croissant or donut with coffee. Line forms by 9am on weekends. Sign notes open 24/7. read more

SK Donuts - Custard donut holes - Donuts Near Me - Union City, California

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Ok the cronuts custard filled holes are it. Yes it is really good. Quick shop. Very clean. The staff were nice and fast. Overall I would def come back for the cronut holes! read more

The staff is very nice and friendly. I am not a donut person. However, I am a cronut hole person (that sounds dirty...) Croissant + donut + glaze = tasty treat. Instead of giving donuts switch it up and get cornut holes! If you have a large order, it's best to call in for pick up. read more

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4.5 STARS Date: Sunday, February 9th, 2025 Time: around 3pm *Donut Holes *Cronut Holes For the super bowl, a friend of ours brought donuts and cronut holes. I had never heard of a cronut hole, so I was intrigued. Not gonna lie, they aren't the prettiest pastries. Idk why they reminded me of worms. But they are mighty tasty - flaky, chewy, buttery. The reg donut holes were good as well. And with them being more or less bite sized, it's good for sharing. Glad I was able to try this spot. I am now a cronut hole fan. REVIEW #3694 read more

SK Donuts - Cronut Holes, Donut Holes - Donuts Near Me - Union City, California

This place is hella fire !!!! Shout out to them Vietnamese ladies. My picky coworker killed them. read more

SK Donuts - Donuts Near Me - Union City, California

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We mainly came for the convenience since this place is open 24/7. We were surprised by the selection considering we came at 1am. It definitely hit the spot for a late night sweet craving. My favorite is the glazed cronut. Their breakfast sandwiches are also good but nothing special. The service is fast. There is seating but it seems like a grab and go type of place. There is also a lot of parking in the plaza. read more

SK Donuts - Donuts 04/2025 - Donuts Near Me - Union City, California

Ok we came here on a whim. We wanted custard donuts and saw this place on yelp. We came in on a Friday afternoon and the lady who helped us really nice and quick. We ordered the Vietnamese coffee and the cronut hole filling with custard. The coffee was delicious and not too sweet. The cronut hole fillings were better than expected. She filled them right then and there so the cronut was nice and crispy and flaky while the freshly filled custard was creamy. A line quickly formed but it moved quickly. They are open 24/7 which mind boggles me as most mom and pop donut stores that I know of are closed by 2 pm. This is located in a plaza with plenty of parking. I didn't see any public restrooms. Would like to come back and try their breakfast sandwiches next time read more

SK Donuts - Vietnamese coffee - Donuts Near Me - Union City, California

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Great hole in the wall donut shop! Love their glazed cronut holes and the breakfast sandwiches! Service is friendly and fast. read more

SK Donuts - Donuts Near Me - Union City, California

Now open 24x7 and the. New owner has been great and very generous! Buy your lotto tickets and donuts and food here with the friendly staff :)... Lots of parking and very safe area :) read more

My hubs and I had happened to come upon here because we were looking to buy some donuts in the area. When we looked on yelp, SK Donuts was the closest to us and we also discovered that they sold cronuts and also cronut holes which I've never seen or had before. They had an overwhelming amount of donuts to choose from and it was very hard not to order more. We got a couple of cake donuts, a crueller, a glazed cronut, a crème brûlée donut which she gave us the option to have it filled with custard (because the cost was the same with it filled or not). We also got half a dozen of cronut holes which is the minimum you could order for it. They had two types of cronut holes: one coated in sugar and the other was glazed. I definitely prefer these over regular donut holes. All of the donuts were delicious! It's awesome that they're also open 24 hours so you can grab donuts whenever you want. read more

SK Donuts - Donuts Near Me - Union City, California

Rudest worker ever, we're not going to come here ever again. My friend dropped her donut right after purchasing and we asked if he was willing to give her a new one and he looked her straight in the face and said "you did it not me." How rude? Just say no. The Manager should be seriously disappointed in their staff. I think he was discriminating against us since he was talking nicely and normally to the couple right behind us too. read more

SK Donuts - Donuts Near Me - Union City, California

Union City's finest! Where all your Tito's (Uncle in Tagalog) chismis or gamble. Lol! I've been coming here since I was a young buck. Went to grab a box of their Cronuts and coffee to start my Saturday morning. Those little bite size addicting little treats are so dangerous that you'll need to check yourself into rehab. The smell of fresh donuts that hit your nostrils will have you instantly salivating. Always a friendly smile and greeting when coming in. read more

SK Donuts - Donuts Near Me - Union City, California

Open 24 hours is a huge plus and they always have lots of options unlike some shops where they run out and don't replenish. I love their Vietnamese coffee it's strong just how I like it and not too sweet! Cronuts are tasty, buttery and soft. I also had a jalapeño cheese bagel which was SUPER SOFT and pillowy it was like heaven. I like how they sell the cronut holes too. 3.25 each isn't bad at all to me. For 6 donuts, two bagels and a Cronut it was around 20 dollars. They have a lot of breakfast sandwiches too. Be wary of the morning crowds, but they do serve you quickly. They have a lot of seating as well! I love coming here read more

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Fast service, and soft, simple donuts. Had the apple fritters, chocolate, Boston creams, maple, and the original (all on separate occasions, of course), and they were all good. A big plus is that this place is open 24 hours. They don't do anything extraordinary, and I appreciate that. Easily one of the best donut shops I've been to on my time on this Earth. Highly recommend. read more

I come here for primarily one thing. Their cronuts. I've tried it at other places and this is my favorite place in the area for it. Whether is the whole Cronut or the cronut holes, I could eat so many of them. The vibe is a normal donut shop but that the cronuts are just really good. read more

SK Donuts - Outside - Donuts Near Me - Union City, California

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Cronut holes for the win!! SK has been around for a while now and has always been a go to donut shop for my family. So glad that they expanded their menu to include these cronuts bc they are just delicious! Light.. airy and just enough sweetness. The place itself is pretty small with a few tables along the perimeter. The breakfast sandwiches are huge and the price is just right. read more

SK Donuts - Donuts Near Me - Union City, California

Went to SK on my way to Palo Alto, as it was one of the few places open really early in the morning that I could find with Croissant Donuts. I'm being quite critical of the croissant donuts themselves, they were quite dry, really missed the mark on what a croissant donut should really be. The croissant donut holes were quite a bit better than the donut's themselves just based on the amount of frosting to offset how dry they were. We did not try anything else as donuts are really something you can get anywhere, we are from out of the area and do not have croissant donuts local so that is the only type of donut we ever seek out on the road. If we do happen to roll through again will snap some photos and see if my review changes. read more

Lots of parking and very fast service, got the entire family working. Cronuts: 3.5/5, definitely have had better. Ham and cheese egg bagel: 1/5, not sure what I was eating Good amount of seating inside, very big space for a donut shop read more

SK Donuts - Donuts Near Me - Union City, California

As someone who's born and raised in UC, SK has always been a staple for donuts. It's your solid local donut shop that has definitely grown in range from ube cake donuts, to cronuts and more. Had to come here and give them props on the tasty sweets. Very kind service, and truly smells wonderful inside. Also excited to see they're 24hrs now! That was the biggest news. Now I know where to go if I'm craving a midnight snack. read more

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They make the perfect breakfast bagel. We have only had the bacon egg and cheese without jalapeños. Ate it so fast both times we didn't even get a picture. Maybe we will remember next time. I don't know how the service or ambiance were because I waited in the car for my food to be brought to me. It was done pretty quickly. read more

The donuts were really good. The cream filled was excellent. The jelly filled was off the charts..