Arcadia is a city in northeast Crawford County, Kansas, United States. As of the 2020 census, the population of the city was 254. Arcadia was f…Arcadia is a city in northeast Crawford County, Kansas, United States. As of the 2020 census, the population of the city was 254. Arcadia was founded in 1862. It was named for the ancient region of Arcadia, in Greece.