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    LA County Library - Diamond Bar Library

    3.7 (90 reviews)
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    Updated over 3 months ago

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    One book being featured in the New book section
    Janey Y.

    3.5 stars! I like that the facilities are relatively new and there are plenty of seats even on a Saturday morning. Similar to all LA County libraries, it is still a bit small which is normal for an LA County library and the selection is a bit small/ old. (+): -a good amount of study areas (booths) -Reading Garden allows you to enjoy a book or possibly meet with a study group outdoors (not that common amenity at libraries-- I recall a library in Santa Monica offering this) -diverse newspapers (Korean/ Chinese) (-): -not much selection in terms of books/ new books are relatively sparse

    Friend of the Library
    Vivianna R.

    I have been coming here for a couple of months mostly to study for the fall semester of college. I enjoy this spot for a few reasons: clean restroom, quiet work space, study rooms, outdoor area, free services, and Friends of the Library. I like how the restrooms are clean, smell nice, and there are ample stalls. In addition to a water fountain and plenty of parking. There are plenty of tables that include 4 chairs and charging ports. If you come when it's busy you may have to share a table. There are chairs scattered around for reading as well. In regards to the noise level, it can get loud in the kids section. I do expect the library to be quiet most of the time, however, this is a place for the community so coming around the time school gets out or around the weekend expect some noise. If this is an issue when you go, bring it to a workers attention and go from there. The study rooms require reservations beforehand, which can be done online (not sure about in person) and the room will be unlocked for you. The availability is open for study rooms so you are sure to find a time you need and can be reserved up to 2 hours. The outdoor area is open and a lovely spot to read or do work. It has nice umbrellas, a lovely mural and rocking chairs! It would be great to spend a day out here. The library has plenty of services such as a photo copying area, computers to use, and printing services. Also tons of community activities be sure to keep your eye out for those! The Friends of the Library is such a fun little place for me to browse books. Every volunteer is kind and I enjoy the range of books it has! Prices range from $1-$2 or $5 for a newer book. They also have a wall dedicated to "fill a bag for $2" where I found two books. This is a great spot to find books to add to your collection. Overall I've had great experiences and every worker is happy to help!

    Spacious cubicle desks and clean study area.
    Christina Y.

    I lived in the Diamond Bar area for over 20 years and I always frequented the library during my school days. This is the newer location ever since they moved from the old location next to the city's fire station back in 2012-2013. I haven't actually studied in the new location until recently and my experience was pleasant. There are plenty of spacious seating and desks, and nearly every desk has a plug outlet for laptops, phone, and other electronic devices. On the day that I went, it was fairly quiet and a bit crowded with college students. But, that's what you got to expect at any library. I'll be back again someday whenever I need a quiet place to do work.

    Emil C.

    I'm only ever here when it's time to cast my ballot or to drop off my ballot for an election. This year with the pandemic, I opted to skip voting in person and to just drop off the ballot in the convenient ballot box located just outside the entrance to the library. For those not familiar, the entrance facing the street (Copley Dr) is for City Hall, while the entrance to the library is around the building in the back. Even prior to the pandemic, this part of Diamond Bar is pretty quiet and doesn't get much traffic. The landscaping and everything surrounding the building is always well maintained.

    Ahhh the peace and quiet of the parking lot.
    Ben C.

    Y'all need to learn how to shut the flip flup! I came here thinking I'd have some good old study times going... but nope. It's adorable for a child to find stuff in a library to get excited over. Cool. Less people are reading these days and it's a cool sign that the future has some hope. Kids, be as excited as you want. Cool beans. Adults. Y'all need to shut the flip flup. Anything beyond a peep and cough are ground upon in libraries. Lol. Not this one. Wholesale discussions errrrwhere. I DONT WANT TO KNOW THAT YOUR DOG IS DRESSING UP AS A MUPPET FOR HALLOWEEN, KIM. I'm sure it'll be amazing. Now, can you take your call outside or text like a normal millennial? ALEX, take KEVIN to a Starbucks with you if you're craving coffee. No one cares if you've been to urth cafe in Pasadena. Ugh, I know the one in LA is better. Dude with the Bluetooth single headphone thing! That thing is so 2010. Also, ShhHhhhh. You've been on the phone for 20 minutes. I would love to know what you're talking about, too. Ahaaa. NO. ShhHHhHhhhHhhhhtop ittttt. Blah. I'm in my car now trying to catch WiFi for my laptop. GG.

    Entrance on east side (behind City Hall).
    India C.

    Delightful modern library designed by LPA, Inc. in Irvine. Diamond Bar city library teamed with natural light flooding through glass windows. Lounging by the bubbling fountain in reading garden was musical (see photos). Visited in the afternoon and librarian was helpful as to book finding. Umbrella bags and receptacle upon entry were a nice touch. Thank you. Many of the desks and computer areas were occupied. Kids, Teen and Adult zones in this library make for a harmonious coexistence. Several desks and tables are provided in a cool environment. If you just have a few books for a leisurely read you will find padded leather lounge chairs. Modus vivendi was silence and observed throughout library. Diamond Bar is a sedulous city. Study on a Saturday was not a chore. Books were truly a pleasure held in two hands and savored. Lovely library contained on a single level. Need more silence? Private rooms are available for reservation. Free Wi-Fi and computers offered. Do try the rocking chairs in the reading garden as they are "creak free" and under warm sunrays.

    Alan M.

    The so so: Small selection of books for a library. Not much seating areas in weekends. Too many A* kids studying The good: Clean friendly staff

    The reading garden

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    6 months ago

    really good library, too far away from my house though, but great library, very kind and respectful staff, very quiet and clean.

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    Review Highlights - LA County Library - Diamond Bar Library

    The library is located in the same building as the Diamond Bar City Hall directly to the rear of the building.

    Mentioned in 3 reviews

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    Diamond Bar City Hall - Entrance

    Diamond Bar City Hall

    3.1(9 reviews)
    0.0 mi

    Sorry guys can't give more then 1 star, I wish yelp had an option for O stars but they don't!…read moreI called this morning June 16th 2025 to get information to file a citation appeal for a parking violation. I was told I can submit everything by going online to the citation processing website. There is no way to submit the appeal into that website it won't allow to upload videos that are 8 Seconds nor it won't allow you to upload the photos because once you upload the photos it gives you a new option to submit the appeal and it won't take it, when you click on submit it just gives you all these red asteriks where you have entered information and even tells you where you are entering the country where you are filing the complaint that United States is wrong !! Phone number, email address, ZIP code number, etc., et. , name, really ??? Even the name says is incorrect. it just looks like a christmas letter rather then an appeal form. Our driveway is being worked on and that is the reason why I'm submitting an appeal we were told to not park our cars on our driveway for at least a week and a half, cement was poured on June 7th and is not completely dried yet, and they are also still not done as they are also fixing some water pipes.

    I went to get a Free oil collection Kit. This is a…read morebeautiful office and located on a hill top with amazing views.You have to go up the stairs and are met by the most helpful people. I was able to get a Free Oil collection Kit. A drum , a funnel, rags and oil wrench. There were plenty of guides on how to save on purchasing non polluting garden tools and land mowers. I love the trip though it was very hot outside.

    Photos
    Diamond Bar City Hall
    Diamond Bar City Hall
    Diamond Bar City Hall - National day of prayer

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    National day of prayer

    LA County Library - Diamond Bar Library - libraries - Updated May 2026

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