Garden City is a city in and the county seat of Finney County, Kansas, United States. As of the 2020 census, the population of the city was …Garden City is a city in and the county seat of Finney County, Kansas, United States. As of the 2020 census, the population of the city was 28,151. The city is home to Garden City Community College and the Lee Richardson Zoo, the largest zoological park in western Kansas.