Mattel, Inc. is an American multinational toy manufacturing and entertainment company founded in Los Angeles by Harold Matson and the husband-and-wife duo of Ruth and Elliot Handler in January 1945 and headquartered in El Segundo, California. Mattel has a presence in 35 countries and territories; its products are sold in more than 150 countries. Mattel consists of three business segments: North America, International and American Girl.

It is the world's second largest toy maker in terms of revenue, after The Lego Group. Two of its historic and most valuable brands, Barbie and Hot Wheels, were respectively named the top global toy property and the top-selling global toy of the year for 2020 and 2021 by The NPD Group, a global information research company.