Party City 3060 Baldwin Park Blvd, Baldwin Park, CA91706 Party City is one of the largest retailers of party supplies, such as decorations, invites, party favors, costumes,…More games and accessories, in the country. In addition to selling party goods, it is a premiere Halloween retailer with more than 600 locations. Everyday items include birthdays, baby showers, weddings, luaus and bachelor parties to name a few. Seasonal items include New Year's Eve, Valentine's Day, Mardi Gras, Chinese New Year, St. Patrick's Day, Easter, Passover, Cinco de Mayo, Graduation, 4th of July, Labor Day, Halloween, Thanksgiving, Christmas and Hanukkah. The spacious store is organized by seasonal and celebration types for easier shopping. It is in the Sierra Center Plaza next to Food For Less.