There are 8 US Post Offices in Hopkins County serving a total of 34,115 residents equating to 4,264 residents per post office. It's estimated that approximately 54,451 packages are handled across the 8 county post offices annually. Hopkins County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 35,161. Its county seat is Sulphur Springs. Hopkins County is named for the family of David Hopkins, an early settler in the area. Hopkins County comprises the Sulphur Springs, TX Micropolitan Statistical Area, which is included in the Dallas-Fort Worth, TX Combined Statistical Area. Hopkins County was once known as the Dairy Capital of Texas. Although Dairy Farms declined in the area in the late 1990s there are still a number of dairy farms located there today. The Southwest Dairy Museum is located in Sulphur Springs."