Lakeport is a city in Gregg County, Texas, United States. The population was 974 at the 2010 census, up from 861 at the 2000 census; in 202…Lakeport is a city in Gregg County, Texas, United States. The population was 974 at the 2010 census, up from 861 at the 2000 census; in 2020, its population was 976. Lakeport is located in southeastern Gregg County. Texas State Highway 149 forms the northeastern border of the city, and leads north 7 miles to Longview and southeast 13 miles to Tatum. Texas State Highway 322 passes through the west side of Lakeport, starting at Highway 149 and leading south 20 miles to Henderson. The city is bordered to the south by East Texas Regional Airport.