Tega Cay is a planned city in York County, South Carolina, United States, located west of Fort Mill and north of Rock Hill. It is a suburb of Charlotte, North Carolina. The population was recorded at 12,832 as of the 2020 U.S. Census. Tega Cay is located on a peninsula along Lake Wylie, twenty miles south of Charlotte. The name Tega Cay allegedly comes from an unknown Polynesian language and means "Beautiful Peninsula", however, this is unconfirmed.