Marshall is a major city of the northeastern region of the U.S. state of Texas, United States. It is a major cultural and educational center in East Texas, and the multi-state Ark-La-Tex region. As of the 2000 U.S. Census, the population of Marshall was 23,935. It is the county seat of Harrison County. Marshall apartments for rent comparison page shows most up to date rent information on Marshall apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.