There are 1 US Post Offices in Sherman County serving a total of 2,366 residents equating to 2,366 residents per post office. It's estimated that approximately 3,776 packages are handled across the 1 county post offices annually. Sherman County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 3,034. Its county seat is Stratford. The county was created in 1876 and organized in 1889. It is named for Sidney Sherman, who fought in the Texas Revolution. Though both Sherman County and Sherman, Texas, are named for the same person, the city of Sherman is located in Grayson County, approximately 430 miles to the southeast."