4.4 – 1,532 reviews • Fast food restaurant
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Craving a burger restaurant near you? Well, the search is over at Carl’s Jr.®, where you can dig into your choice of mouthwatering, charbroiled burgers or chicken. Whether you’re in the mood for a big, juicy, crispy Hand-Breaded Chicken Sandwich, a classic bacon cheeseburger like our iconic Western Bacon Cheeseburger®, a charbroiled Third Pound 100% Angus beef burger, or even our revolutionary Beyond Famous Star® with Cheese with a Beyond Burger® plant-based patty, we know how to satisfy your hunger. Visit your nearest Carl’s Jr.® restaurant at 141 S Diamond Bar Blvd, and Feed Your Happy.
Fast-food chain known for its variety of piled-high burgers & meal combos, plus shakes.
✔️Breakfast ✔️Brunch ✔️Lunch ✔️Dinner ✔️Dine in ✔️Take out ✔️Delivery
Hours
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
| Sunday | Open 24 hours |
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| Thursday | Open 24 hours |
Menu Photos
Order and Reservations
Order: Order online
carlsjr.com
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Related Web Results
Carl’s Jr. – Diamond Bar – Grubhub
Order delivery or pickup from Carl’s Jr. in Diamond Bar! View Carl’s Jr.’s February 2026 deals and menus. Support your local restaurants with Grubhub!
Reviews
Accer Masapequena
Kevin was outstanding in assisting me with my order, best costumer service.
… moreMarion Dee Ejan
Service was exceptional + thank u Kevin for your attention and suggestions for us tonight. My son was so sick and late night eats suggestions to keep it simple and nutritious for healing was the way to go. Will come again!
… moreAnna Read
Great customer service from Kevin! Was very polite and with quick service. He made sure the food was hot and fresh.
… moreV
Went through the Carl’s Jr. at 4AM (what better time) and I had the pleasure of speaking with Kevin. He was attentive and didn’t make me wait at all once I pulled into the drive thru.He was extremely polite throughout the whole process. I pulled up to the drive thru window and he seemed to be very time efficient. I paid for the meal, then he gave me the food hot and fresh. He made sure to ask me about condiments too which I’m grateful for. I didn’t feel like I was waiting for a long time at all. I would recommend at 4AM with Kevin.
… moreAlex Wu
Kevin did an amazing job ensuring I got my order right after I had a long hard day. It really made a difference to get good service at a fast food place late night. Order 417540. Definitely would come again.
… moreCoding Successfully
The person who assisted us today was named Kevin, he has a fantastic attitude! Great service! I would love to receive a customer service like this in every place I visit. Great value!
Thank you so much!
Of course delicious food!
Thanks to his attitude I ordered a triple burger plus a double!
… moreKaren Zhao
I had a great experience going through the drive through here thanks to Kevin. Even though it was past 11 pm, the service was amazing and fast. Thank you Kevin!
… morePaul Martinez
Didn’t notice how bad the lettuce on the chicken sandwiches were until a friend pointed it out. Very disappointed that the staff would serve food in such bad quality!
… moreKatherine S
We came in at 1:30 am and Kevin took great care of us. His customer service was excellent. He was super friendly and I wish every interaction I have with a customer service provider is as good as the one I had with Kevin tonight. Thank you so much.
… moreColin Kase
Kevin was a fantastic help and stayed positive even during the late hours of the day.
… more