THIS IS NOT A QUIET LIBRARY…read more I've been holding off on writing this for a long time because I genuinely couldn't believe how consistently frustrating the experience has been. I come here often and stay for hours at a time to study. I'm not popping in briefly. I'm here working, focusing, and trying to use the space the way a library is traditionally meant to be used. I understand this is a public space funded by taxpayers and open to everyone. I respect that. But libraries also have rules for a reason, and here they are rarely enforced. That's the real issue. The open concept design might look modern, but it completely eliminates any sense of quiet. You can hear every front desk interaction across the floor. Phone calls, loud conversations, audio playing from devices, and people speaking at full volume are constant. Some librarians genuinely try to maintain order and I truly appreciate them. But others make no effort at all. Over time you start to recognize who will step in and who won't. I've had to get up and specifically find the staff members who will address disruptions. I should not have to do that. There is no dedicated quiet section. None. That alone is shocking. If you are looking for a peaceful study environment, this is not it. It feels more like a social space than a library. Food policies are inconsistently handled. I originally thought eating was allowed because everyone does it here, only to later learn at another county branch that food is not permitted. The rules technically apply here too, they're just not enforced. The same goes for phone use and strong odors, both of which are clearly addressed in library policies but frequently ignored in practice. The men's restroom also has a persistent odor issue. What makes this even more disappointing is that I've visited the Diamond Bar branch, which operates under the same county system, and the difference is night and day. The rules are upheld consistently and respectfully there. It's calm. You can study for hours without constant interruptions. That experience makes it clear that the issue here is not the public, but the lack of consistent enforcement and management. To be fair, there are positives. There are plenty of tables and outlets. The children's section is well designed and engaging. They offer programs for kids and adults, including community classes. The book sales are fantastic and affordable. And again, some librarians are helpful and professional. But the core function of a library should be to provide a space where people can read, study, and focus. When you cannot go more than 20 to 30 minutes without loud disruptions, that is a management problem. I'm not expecting perfection. Public spaces will never be silent. But basic rule enforcement is not too much to ask. If you want a quiet place to work, I strongly recommend going to the Diamond Bar location instead. The difference is immediate. It's disappointing that the library in my own city could be so much better with relatively simple changes. Consistency would fix most of this.

after construction, it's so beautifully spaced out and organized! i lov how the fiction section is…read moreso large

The library has board games, friendly employees, and quiet study room. They seem very involved with…read morethe community and have cool events.

Went there for the first time on Saturday. Interesting, the 2 ladies in the front desk couldn't…read moreanswer all questions, but nice library regardless!

It's an okay library though compared to others, this one is outdated…read more Nonetheless you could get a good study session if you bring noise canceling headphones.

Library opens at 7:30am and I've been here many times at that exact time. Being one of the firsts…read moreof the day to use the study tables on multiple occasions, finding the tables FULL of eraser peels from the days before is really bad. Trash still in the trash cans and on the carpet. Apparently, no one wipes down the tables once they close or before they open :( no wonder everyone's always sneezing in here :( Load up on hand sanitizers, people.. On the other hand, staff is nice and helpful.

LA County Library - Diamond Bar Library *June 30th, 2026…read more*10:00am-5:00pm - Tuesday *4 Stars Environment: *Moderate Sized Parking Lot *Helpful Staff *Average Seating Available Went here with a friend to get some work done and overall had a good experience. The staff was very friendly, and the library was clean and well maintained. I was actually surprised by how busy it was for the summer, with people of all ages using the library throughout the day. My friend and I were hoping to use one of the private study rooms, but they were all booked. For anyone planning to go, you can reserve a study room up to one week in advance for a maximum of two hours per reservation. We were a little disappointed that we couldn't reserve a room until later in the afternoon, but luckily we arrived right when the library opened and were able to find a table. One thing I wish the library would consider is allowing walk-in use of reserved study rooms if the reservation becomes a no-show. The room we wanted sat empty for the first hour we were there, and it would have been nice if someone else could have used the space instead. Overall, it's a nice place to get work done with plenty of natural light and a good atmosphere, although I do wish the chairs were a little more comfortable for longer study sessions.

I originally discovered Diamond Bar Library while searching for a quieter place to study after…read morespending time at the West Covina Library. I still remember the first day I walked in here. The difference was immediate. The atmosphere felt calm, focused, and peaceful. It honestly felt like stepping into study heaven. For anyone who needs a consistently quiet environment to work or study, this has easily been one of the quietest libraries I've experienced in Los Angeles County. I spent many long hours here preparing for my medical board exams, so I really came to appreciate the environment. The layout offers a great mix of larger tables and individual study cubbies, and there are outlets available which makes settling in for long study sessions much easier. The library also feels very safe, likely because of its location next to City Hall and the fact that it sits a bit tucked away from the busiest parts of town. There are entrances in both the front and back, and I personally found the quieter seating area on the left side when entering from the back to be my favorite spot, especially the tables near the windows where you still get that nice natural light during the day. The staff has always been friendly and helpful as well. I believe one of the librarians named Jen really helped maintain a welcoming atmosphere. One thing I appreciate about this location is that they take maintaining a focused study environment seriously. For example, eating isn't allowed inside the library, which helps keep things clean and minimizes distractions. There is a garden area outside and you can always step outside for a quick snack break. After spending many hours here, I started to notice some of the daily rhythms of the building. The restrooms are impressively clean, which deserves a shout out to whoever keeps them maintained. The library also has a small bookstore run separately from the library itself, which is a fun little feature if you happen to stop by while it's open. If there were a few small improvements that could make an already great space even better, they would mostly relate to sound consistency. Because this is such a quiet library overall, small sounds can stand out more than they normally would. Occasionally conversations at the service desks or phones ringing can carry across the room, and sometimes outside maintenance work can be heard from the garden area. Nothing that ruins the experience, but little adjustments there could make an already peaceful environment even more ideal for studying. I also noticed that the closing announcements can be a bit startling if you're deep in concentration, so maybe a softer chime before the announcement could make it feel a bit smoother. Another thing that could help maintain the quiet atmosphere is occasionally reminding visitors with young children that certain sections are intended for quiet study. The kids' area is nicely separated, which already helps a lot, and a gentle reminder here and there would probably keep everything running smoothly. Overall, I'm genuinely grateful for this library. The long hours are fantastic. Being open until the evening made it possible for me to have full study days here when preparing for my boards. Yes, it was a bit of a drive from West Covina, but it was absolutely worth it for the calm environment and the ability to truly focus. Diamond Bar Library became one of my go to study spots, and it's a place I'll definitely remember fondly.

They offer a lot free programs for adults and kids! Check their calendar on their website for…read moreupcoming events. They also offer different seeds monthly. The bookstore offers variety of books that are affordable. I've found some used condition books for kids. There are two different areas for parking, 2 hours and 4 hours. Parking hours are enforced.

Was working in the area and stopped in to check it out and get a library card. This library is…read morebigger than most, 1 story and has a lot of areas to sit and read, work or study. I sat by the north window where there was a long table and an outlet to charge things. The parking lot is clean with plenty of parking. Outside it's surrounded by large pine trees, lots of green grass, and a view of the mountains. Definitely one of my favorite libraries that I've been to this year. There's also security outside or by the door.

We had a great experience this morning. Staffs were friendly and helpful. Khanh Kiet Phung was…read morehelping my kids look for books and he was easy to communicate.

This is the worst library to study at. Don't waste your time going here. I would give zero stars if…read moreI could. It's hot. There are few outlets. There are few places to sit. The staff are condescending. It's loud from children talking and dogs barking. I've gone to this library twice now and was not happy with either visit. Although the space looks like it has a lot of tables, there are very few with outlets to plug a laptop into. The first time I came, I was able to find only one available table with an outlet because I came shortly after they opened. That time and this time, the library was extremely loud. There were so many children running around and screaming. This time, there was even a dog barking and running around too. I just went to the library again today and was not able to find a single available table to sit at. The only empty seats were where the computers were. Only a couple of the computers were being used, which left 6 empty spots. I didn't really want to sit there since I already had my own laptop, but it was the only open table. I shifted the keyboard to the side and made do with the small space. Since there were plenty of computers still available next to me, I didn't think it would be a problem to sit there. Boy was I wrong. A woman with glasses approached me maybe 15 minutes after I sat down and told me that those spots were meant for people who were going to use their computers. When I told her that there were no more tables and that there were plenty of available seats still next to me, she condescendingly told me that I'm the one to ever argue with her because everyone else usually just moves. I told her that I would move if someone needed the computer. She again said I had to move then walked away without another word. Since there were no other available spots to sit at, I had to leave the library. This woman was not just condescending to me by the way. Right when I first sat down, the same woman was speaking to a man by the printers. The way she was speaking to him was equally condescending. I didn't want to listen in on their conversation, but her tone was really mean and obnoxious as she told him he was wrong about something. She was speaking to him in a way that felt like she was absolutely looking down on him. I hope upper management has a word with her about her customer service skills because they are terrible. My last note is about the temperature of the library. It's really hot outside, so I thought it would be nice to study where there's an A/C. Although it was slightly cooler than outside, it was still pretty warm in there. It did not feel that much more comfortable than studying outside. I don't think it was warm just because there were a lot of people because it was equally warm the first time I went too(right when they opened).

This place is big and nice, but when I had my 21st in 2024, Yvette, the lady who handles the whole…read morerental process, was rude to my mom in person when we went to go look at how we wanted the tables to be set up. They were watching the whole time, walking in and out, and sitting at their desk watching as well, waiting for us to mess up. They had my mom open sparkling cider so they could smell it to make sure it wasn't alcohol. My cousin had alcohol delivered to the place as a gift for me to take home, and we even tried to bring alcohol in for a game for my guests to take home if they win, and they said something. We told them it's just for a game and that that's what people do for a 21st, they bring alcohol as a gift. We didn't get our $400 deposit back because of it. The TVs are old and can't hook up for karaoke. No kitchen access. My uncle had closed the door so we could talk in private about how we are going to set up the decorations, and they said the doors have to be open at all times. My uncle got a little upset and told them something. Other than the people being rude and nosy, and the TVs being old and no kitchen access, there were people from another party outside walking into my party, plus having to share the restrooms with them even though we paid to not have to go through that. The place was nice and spacious, but I would definitely not rent it out again. How's this

Great place to go for seniors. I am 72 years old and disabled and this is only about four blocks…read morefrom my home so it's really easy to get to. Everybody's very friendly highly recommend this place for anybody in the area. I'll write more when I have more time. Have a great day, everybody.

I have lived in the City of Covina for more than 25 years. My children attended Charter Oak Unified…read moreSchools. Through the years, I worked, shopped, dined and volunteered on many city events. I met Barbara Ann Hall, P.h.D., curator of the Vintage Years Exhibit. She devoted her time to collecting and restoring historic more than 100 photographs of the City from the 1800s to 1950s. She was a member of the Covina Valley Historical Society who was instrumental in this project. Most of the photos in the collection were taken by C.W. Tucker who had a photography studio in 1900s. You are welcomed to tour the photos during business hours (Monday-Thursday from 7AM-6PM, closed on State holidays). When Dr. Hall was looking for sponsors to contribute toward the cost of exhibit, I gladly chose a photo that is on display by the City Manager's office. This was around 1999 and cost about $150-$200, I forgot the actual amount to donate toward this worthy cause. The history beginning in 1800s and continuing to the 1950s was interesting to learn about. The City of Covina incorporated in 1901. I now know that some of the streets are named after the founders and businessmen who worked in the Citrus groves or opened a business now known as Downtown Covina. Notables to mention: John Rowland, Ellen Beach Yaw, soprano singer (Lark Ellen), William Workman, Julian & Antonio Badillo, Covina Women's Club, Covina Concert Band, Covina Chamber of Commerce, City Board of Trustees, Covina City Council and staff. I chose a few of the photographs to be part of this review. There is much more and looks better in person! I am sure you will enjoy a visit to City Hall, don't forget to tell'em that Rosie sent ya!

It's in beautiful historical little downtown Covina area…read more I find diversity as I walk the city, people are helpful when you stop and try to find information ‍ Thank you city of Covina