Zip code 68502 statistics: (Find on map) Estimated zip code population in 2016: 26,780 Zip code population in 2010: 26,238 Zip code population in 2000: 27,659 Mar. 2016 cost of living index in zip code 68502: 85.1 (less than average, U.S. average is 100) Land area: 5.9 sq. mi. Water area: 0.0 sq. mi. read more