Party City is an American publicly traded retail chain of party supply stores founded in 1986 by Steve Mandell in East Hanover, New Jersey. Based in Elmsford, New York, the company is the largest retailer of party goods in the United States and Canada, operating over 900 company-owned and franchise outlets under the Party City, Halloween City, and Factory Card & Party Outlet brands.

Official website: http://www.partycity.com

Store locator: http://stores.partycity.com