Location.com logo
Brand Certified

McDonald's

3.7
(1488 reviews)

Business Details

(909) 861-2624
http://www.mcdonalds.com/

About

Fast Food RestaurantRestaurantBreakfast RestaurantCoffee ShopBurger JointSandwich RestaurantMcDonald's
McDonald’s USA, LLC, serves a variety of menu options made with quality ingredients to millions of customers every day. Ninety-five percent of McDonald’s approximately 13,500 U.S. restaurants are owned and operated by independent business owners. For more information, visit www.mcdonalds.com, and follow us on social: X, Instagram, TikTok and Facebook.

Details

  • Drive-throughAvailable

Location

McDonald's
205 South Diamond Bar Blvd, Diamond Bar, CA
91765, United States

Hours

MondayOpen 24 hours
TuesdayOpen 24 hours
WednesdayOpen 24 hours
ThursdayOpen 24 hours
FridayOpen 24 hours
SaturdayOpen 24 hours
SundayOpen 24 hours

Reviews

3.7
1,488 reviews
5 stars
619
4 stars
325
3 stars
222
2 stars
103
1 star
219
  • MB
    Mitchell Byer
    Apr 27, 2026
    1.0
    I rarely leave reviews but I am leaving one in hopes the manager sees so that they clear house and fire people. I order at 8pm Mon 4/27, I ordered ahead through the app, when I got there I was the ONLY car in the entire drive through. I received my drinks right away, then proceeded to wait an extra 20 minutes, where it felt like I was ignored and forgotten, not them being busy. Several of the workers were talking and chatting infront of me, when they saw I was annoyed they asked me to pull forward so I would be out of their sight. I hope things change and I will not be coming back to this location.
  • 0
    001 *
    Apr 6, 2026
    1.0
    I had a very disappointing and frustrating experience with this McDonald’s location. I placed an order through the mobile app and even redeemed my reward points for it. However, when I arrived, the staff told me that their system did not show my order and refused to prepare my food. What made the situation worse was their extremely rude attitude. Even after I showed them the order record and payment deduction on my phone, they completely ignored me and offered no real help. They kept asking me for the 4-digit code from the app, but I clearly explained that the McDonald’s app had just been updated and was having issues, so I could not open the detailed order page. Despite that, the app still showed that my payment had been deducted. Instead of trying to understand or solve the issue, they simply dismissed me. This experience made me feel disrespected and poorly treated as a customer. Although the amount of money was not much, that is not the point. After all of this happened, I ended up placing another order again just to get my food, which I should never have had to do. This kind of situation should not happen. Customers should not be blamed for app or system errors, and staff should treat people with basic respect and professionalism.
  • MB
    Manuel Bonilla
    Apr 1, 2026
    3.0
    Saw the clown !
  • MM
    MLopez
    Mar 16, 2026
    1.0
    Ice cream machine is always broken. You’d think with all the money McDonalds makes that they can fix their broken machines. Wouldn’t doubt employees are to lazy to work the machine cuz they need to clean it at the end of the day
  • DJ
    Diane C (Justmyopinion)
    Mar 16, 2026
    1.0
    Management: Please don't send me a messagè that mentions contacting you so can can resolve the issue. We all know nothing changes and you want it to appears as something will actually change. I know it's my fault because I chose this establishment, but I find myself thinking they can't always fail. Again, I was wrong! Food: Ordered Big Mac Combo (no shred), side of sauce, and fresh fries, and coke. Food: Received Big Mac Combo with shred, no sauce on or on the side, fresh fries no salt, and a coke that was almost pure syrup. One thing that I can say about McDonald's they are consistent in serving crappy and not to order food. Go to Denny's for a fresh hot burger to order for $9.99. Break the emotional McDonald's eating.

Frequently Asked Questions About McDonald's

What are McDonald's delivery hours in Diamond Bar, CA?

Delivery is available from 5:00 AM to 11:50 PM Monday through Thursday and Sunday, from 5:00 AM Friday to 3:59 AM Saturday, and all day Saturday from 4:00 AM to 3:59 AM Sunday.

Does this McDonald's location have a drive-through, and when is it open?

Yes, this McDonald's has a drive-through open 24 hours a day, seven days a week.

Brand Certified Facts from McDonald's

This information is certified by McDonald's and published from the brand's official system of record. Data is distributed through an enterprise-grade knowledge management platform. Learn more about our data sources
Certified May 17, 2026Yext Knowledge Graph
  • Address
  • Categories
  • Geo coordinates
  • Legal business name
  • Hours of operation
  • Phone number
  • Official website
Syndication Network
Approved business data is pushed to 100+ publishers, including: