New Territory is a master-planned community within the city of Sugar Land, Texas, United States. It was formerly a census-designated place and in the extraterritorial jurisdiction of Sugar Land, in unincorporated Fort Bend County. It was annexed into Sugar Land on December 12, 2017. The population was 15,186 at the 2010 census, up from 13,861 at the 20…New Territory is a master-planned community within the city of Sugar Land, Texas, United States. It was formerly a census-designated place and in the extraterritorial jurisdiction of Sugar Land, in unincorporated Fort Bend County. It was annexed into Sugar Land on December 12, 2017. The population was 15,186 at the 2010 census, up from 13,861 at the 2000 census.