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

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.

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!

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.

This summer, customers ages 18 and younger can visit a participating library and pick up a free…read morenutritious meal. June 16 - August 7* Tuesday - Friday, 12 - 1 pm Lunch is available for no-contact pickup on a first come, first served basis, while supplies last. There are no restrictions on family income. Since 2015, LA County Library has been offering free, nutritious lunches to kids 18 and under with its Lunch at the Library program. It keeps children and teens nourished during the summer months, helping to ensure that kids return to school in the fall ready to learn. Lunch at the Library is a partnership between LA County Library and the Los Angeles County Department of Parks and Recreation, and is supported by the California Summer Meal Coalition and California Library Association. This program is supported by a grant from the California State Library. *Lunch will not be available at any locations on July 3.

Overall great location. I came to study and it was extremely noisy I couldn't focus, kids were…read morerunning around. It would've been a better experience if the noise level was down

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.

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

Nice and secret study spot! Love coming here to escape from Leavey to focus when I really need to…read morecrack down on my studies and avoid running into people I know. Definitely one of my favorite libraries at USC. VKC is one of the most well-known buildings at USC, but it's a surprise that not a lot of people know that there's a library in here because it's underground. Lots of tables and I've never had an issue finding a place to sit. The printers and computers are generally less crowded too so printing stuff is always a breeze! The student workers are always really nice too. I've always been greeted by someone walking in and out of the entrance. +pro tip: There are jolly ranchers for grabs in the jar at the check out counter!

I'd come study at this library over Leavey any day! It's much quieter and there are less people,…read moreprobably because it's mainly used by students of international relations and political science instead of the general USC student population. They have an awesome section in the corner with various newspapers from around the world, and they also have a wall of IR magazines/interesting new journals they display. The book stacks are full of awesome books (of course) but they also have stacks upon stacks of journal collections that are very useful for research papers. The librarians here are very helpful as well, and sometimes they even have free coffee near the entrance! =D