Colwich is a city in Sedgwick County, Kansas, United States. As of the 2010 census, the city population was 1,327.
Colwich is located at 37°46′50″N 97°32′26″W / 37.78056°N 97.54056°W / 37.78056; -97.54056 (37.780480, -97.540420). According to the United States Census Bureau, the city has a total area of 0.7 square miles (1.9 km²), all of it land.
As of the census of 2000, there were 1,229 people, 376 households, and 315 families residing in the city. The population density was 1,652.5 people per square mile (641.2/km²). There were 392 housing units at an average density of 527.1 per square mile (204.5/km²). The racial makeup of the city was 98.62% White, 0.57% Asian, 0.24% from other races, and 0.57% from two or more races. Hispanic or Latino of any race were 0.81% of the population.