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McDonald's

3.7
(1484 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
1,484 reviews
5 stars
617
4 stars
324
3 stars
222
2 stars
103
1 star
218
  • 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.
  • SF
    summer fu
    Feb 22, 2026
    1.0
    I went through the drive-thru around 3:10 PM on 2/22. I ordered two Happy Meals, one McCrispy medium combo, and a 10-piece Chicken McNuggets. When I got home, I found a long hair inside one of my son's Happy Meal chicken nuggets. This is extremely gross and unacceptable, especially since it was for my child. I did not take the receipt, but I paid at the drive-thru around that time. Please advise how this can be resolved.

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

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Certified April 12, 2026Yext Knowledge Graph
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