Comanche is a city located in Comanche County in the U.S. state of Texas. The population was 4,211 at the 2020 census. It is the count…Comanche is a city located in Comanche County in the U.S. state of Texas. The population was 4,211 at the 2020 census. It is the county seat of Comanche County. A military road known as the "Corn Trail" came through in 1850 to supply area forts and encourage settlement. The town was established in 1856 and the city was incorporated in 1858. Near the modern courthouse is the preserved log structure known as the "Old Cora Courthouse", one of the oldest standing wooden courthouses in Texas. Cora, the former county seat, later became Gustine.