Tega Cay is a planned city in York County, South Carolina, United States. The city is located north of Fort Mill, South Carolina. The population was recorded at 7,621 from the US 2010 census. The City of Tega Cay is located on a peninsula on Lake Wylie, which is twenty miles south of Uptown Charlotte and five miles north of Downtown Rock Hill. The name Tega Cay is Polynesian for “Beautiful Peninsula.”