New Chapel Hill is a city in Smith County, Texas, United States. The population was 620 at the 2020 census. It is part of the Tyler, Texas …New Chapel Hill is a city in Smith County, Texas, United States. The population was 620 at the 2020 census. It is part of the Tyler, Texas Metropolitan Statistical Area. According to the United States Census Bureau, the city has a total area of 2.5 square miles, all land.