Angus is a city in Navarro County, Texas, United States. The population was 444 at the 2020 census. According to the United States Census …Angus is a city in Navarro County, Texas, United States. The population was 444 at the 2020 census. According to the United States Census Bureau, the city has a total area of 3.3 square miles, of which 3.3 square miles is land and 0.04 square miles is water.