Hat World, Inc. (doing business as Lids Sports Group) is an American retailer specializing in athletic headwear.

It primarily operates under the Lids brand with stores in the U.S., Puerto Rico, Canada, Australia, France, Germany, and the United Kingdom plus various websites.

[3][4] Hat World, Inc. was founded in 1995 by George Berger, Glenn Campbell and Scott Molander, with its headquarters office in Sioux Falls, SD.

Hat World's first store opened on November 3, 1995, in the Tippecanoe Mall in Lafayette, Indiana.

Hat World, Inc. (dba the new "Lids") was acquired in April 2004 by footwear retailer Genesco Inc.[6] In 2019 Genesco sold Hat World/Lids to a joint venture between Ames Watson, LLC and Fanatics, Inc.[7] Also in 2019, rapper Meek Mill acquired an ownership stake.