Sherman is a city in Grayson County, Texas, United States. The population was 35,082 at the 2000 census. The population had increased to an estimated 37,623 in July 2006.It is the county seat of Grayson County. It is also one of two principal cities of and is included in the Sherman-Denison Metropolitan Statistical Area. Sherman apartments for rent comparison page shows most up to date rent information on Sherman apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.