Zip code 63101 statistics: (Find on map) Estimated zip code population in 2016: 3,350 Zip code population in 2010: 2,620 Zip code population in 2000: 1,327 Mar. 2016 cost of living index in zip code 63101: 91.5 (less than average, U.S. average is 100) Land area: 0.4 sq. mi. Water area: 0.0 sq. mi. read more