Agua Dulce is a city in Nueces County, in the U.S. state of Texas. It is located on the Texas Mexican Railway at the intersection of State Highway 44 and Farm to Market Road 70 in west-central Nueces County. The name, Spanish for "sweet water", refers to a nearby creek. A town in Texas, Sweetwater in Nolan County in West Texas, uses the English name. The town was established by the 1900s. The population of Agua Dulce was 685 in the 2020 census.