Nazareth is a city in Castro County, Texas, United States. The population was 311 at the 2010 census, down from 356 at the 2000 census.

Castro County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 7,371. Its county seat is Dimmitt. The county was named for Henri Castro, who was consul general to France for the Republic of Texas and the founder of a colony in Texas.