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Party City Upland, CA - Mountain Square

338 South Mountain Avenue
Upland, CA 91786
(909) 946-8090
Store# 1509
Flagship Store
A whole new Halloween experience
Coming Soon!
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Additional Stores Nearby
Mountain Square View Local Ad
338 South Mountain Avenue
Upland, CA 91786
Store# 1509
Coming Soon!
Mon 09:30 - 20:30
Tue 09:30 - 20:30
Wed 09:30 - 20:30
Thu 09:30 - 21:00
Fri 09:30 - 21:00
Sat 08:30 - 20:30
Sun 10:00 - 18:00
Flagship Store
A whole new Halloween experience
Coming Soon!
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Chino Towne Square View Local Ad
5549 B Philadelphia Street
Chino, CA 91710
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Mon 09:30 - 20:30
Tue 09:30 - 20:30
Wed 09:30 - 20:30
Thu 09:30 - 21:00
Fri 09:30 - 21:00
Sat 08:30 - 20:30
Sun 10:00 - 18:00
Flagship Store
A whole new Halloween experience
Coming Soon!
4.0
Terra Vista View Local Ad
11098 Foothill Boulevard
Rancho Cucamonga, CA 91730
Store# 443
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Mon 09:30 - 20:30
Tue 09:30 - 20:30
Wed 09:30 - 20:30
Thu 09:30 - 21:00
Fri 09:30 - 21:00
Sat 08:30 - 20:30
Sun 10:00 - 18:00
Flagship Store
A whole new Halloween experience
Coming Soon!
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Spectrum Towne Center View Local Ad
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Tue 09:30 - 20:30
Wed 09:30 - 20:30
Thu 09:30 - 21:00
Fri 09:30 - 21:00
Sat 08:30 - 20:30
Sun 10:00 - 18:00
Flagship Store
A whole new Halloween experience
Coming Soon!
7.0
About Us

Shop Party City in Upland for Birthday Ideas & Supplies

All birthdays are worth celebrating, even milestone birthdays that may seem like a mixed blessing. So if you're planning a party for that special someone, or if you're simply looking for inspiration and fresh birthday ideas, come to Party City Mountain Square, where birthday supplies are stocked year round and great birthday ideas abound.

Birthday is the core of our party business. Here, at Party City Upland, you can find everything and anything related to birthdays. For easy shopping, all birthday supplies are neatly organized by color, type, and theme.

All products we sell are tested for quality and safety before they ever reach our shelves — if they don't pass muster, we simply won't sell them. Best of all, if you're in a hurry, Party City store associates are trained "party experts" who can offer ideas for any birthday celebration, from first to 100th, and direct you to the party essentials.

At Party City Mountain Square, it starts with over a hundred birthday themes for kids — licensed birthday collections like Mickey Mouse and Disney Princess. The tableware includes plates, napkins, cups, and table cover, and with all that you have the option of purchasing matching invitations, decorations, party favors, and more. Whatever your budget, there's a party plan to fit, and not just with children's birthday, but with first birthday, 30th, 50th, and other milestone birthdays as well.

Many stores carry a limited sample of birthday goods, but at Party City Mountain Square, we specialize in party supplies. We offer all kinds of themes, decorations, and favors year round, and at prices you can afford. Shop with us and you'll find many ways to celebrate — and just in case you don't, Party City staff associates are standing by to help you plan the perfect party.

Birthday Party Supplies Include:

  • First birthday supplies
  • Over 100 children's birthday themes
  • Milestone birthday themes: 30th, 40th, 50th & more
  • Birthday invitations & banners
  • Birthday decorations & decorating kits
  • Birthday favors & balloons
  • Birthday games & pinatas
  • Candy & treat bags
  • Gift wrap, ribbons & bows