Jack in the Box has always been the place for those who live outside the box. Where you can try new things and order what you want when you want it, while always getting it fast, hot and fresh. If you love the classics, burgers make up the core of our menu with the signature Jumbo Jack®, Ultimate Cheeseburger, the Buttery Jack™ and the Sourdough Jack® on our trademark toasted sourdough. If you seek good value, we offer Jack’s Deals with our famous two tacos, chicken nuggets, Jr. Bacon Cheeseburger and more. We don’t dictate cravings. We serve our full menu, including breakfast, all day every day. Want a burger for breakfast or breakfast sandwich for dinner? You got it.
Burgers, chicken, tacos & breakfast items fill out the menu at this fast-food chain. Based on 453 reviews, the restaurant has received a rating of 3.6 stars. Price $
✔️ Dine-in ✔️ Drive-through ✔️ No-contact delivery

Address:
1165 S Diamond Bar Blvd, Diamond Bar, CA 91765
Phone: (909) 861-3562
Website:
Hours
| Friday |
6 AM–1 AM |
| Saturday |
6 AM–1 AM |
| Sunday |
6 AM–12 AM |
| Monday
(Labor Day)
|
6 AM–12 AM
Hours might differ
|
| Tuesday |
6 AM–12 AM |
| Wednesday |
6 AM–12 AM |
| Thursday |
6 AM–12 AM |
Menu
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Photo Gallery
Reviews
John Stevens
I was 1 of 2 cars in line. Ordered an extreme sausage and a biscuit sausage. Paid waited 30 minutes after paying for food effectively my whole lunch break for a munchies box just filled with regular fries. And a taco. I want my 12 bucks back.. what a dumpster fire
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Kathy Clements
I would have to say drive thru service is terrible. Husband and ordered sour dough jack, large root beer, (was entered as large coke, that was corrected at the window0) The problem is I ordered a grilled chicken sandwich. I thought something was amiss by the price of $2.99, then it was corrected to $4.99. Got home to find two breaded fried chicken on a bun. Not what I ordered. Called JACK IN THE BOX to say did not get what I ordered and I am not eating this.
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ALEX LOPEZ
The manager, The Mexican lady with the bad attitude. I tried to order tacos without lettuce and she said the can’t do that? Why? And you what she does? She only put lettuce . Don’t go here worst customer service. You don’t deserve to be here in diamond bar. This isn’t my first time there. She’s always in a bad mood. I mean always. I hope she reads this comment. She shouldn’t be working there in she acts like that. That’s messed up. I’m a nice guy but when you do that it leaves a bad taste in my mouth. Next time I am reporting her. I will literally call and find her hire ups. I got 16 tacos and everyone was just lettuce.
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Aidan Chen
Jack in the box is good. Can’t disappoint. Pretty consistent as well. Wish they could bring back cheese and bacon wedges. Those were my favorite.
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Wes Jones
No one at front counter, had to drive through. I ordered #4 should be $7.59 I was charged $10.59.?. I went inside to get a $3.00 PLUS!! tax refund and the correct meal (wrong food) . No one new how to do a refund, called 2 shift managers. She finally agreed to give me a refund of (get this?) $1.40 because she said there’s tax on it? That’s over 50% tax pluss I already paid tax of 9.5% and that would be over 60% total tax. That I paid and should have been refunded the tax not charged more tax W.T.F.??? Pluss when I did finally get the correct food it looked like they stepped on the burger? And there was something wet on the frys!! I through the whole thing out… don’t go to this location!!! They should close it. And by the way when I asked why where they charging me tax again all of a sudden none of them spoke English..
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David Hsu
I hate sticky floors… And like everywhere was sticky. Why?!?
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Levi Mellen
I hardly eat fast food anymore. I stopped eating here because a lady in the drive thru was rude all the time. First time back in about a year and service wasn’t bad but I Definitely got food poisoning. Never eating here again
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Dulce Ruiz
I was here on a weekend due to a local event so I decided to make a quick stop and get something to eat before heading out to our event. I was so embarrassed. The “team lead” who’s name tag said “Ramona” was SUPER RUDE. I completely agree with all the negative comments I’ve read on here. I attend many Food & Beverage events. And I was truly embarrassed by her attitude, especially in front of a few Restaurant Critics. Someone in headquarters needs to be notified as I was reading complaints beings about her as far as last year and her work ethic is worse. So unprofessional.
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ND
The service at this chain is rather sketchy and often feels ghetto. Yet today, this location was rather friendly when I picked up an online order in the late afternoon. The male server was responsive and friendly. One of my favorites items on the menu is the chicken fajita pita wrap, which is relatively healthy compared to burgers. I’m more than happy to bestow more stars, at least for today!
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Jan Krekan
Wanted to eat in, nobody at the counter. Waited 2 minutes, went to the restroom, returned. Still no one to help customers. Waited another minute, left. Never coming back.
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