51103 is zip code located in Sioux City, Iowa. The population is 17,831, making 51103 the 3rd largest zipcode in Sioux City and the 3rd largest in Woodbury County.
There are 6 public schools in 51103 with an average Homefacts rating of D+. The total crime rate for Sioux City is moderate , and there are 74 registered sex offenders residing in the zip code 51103. Unemployment in 51103 is moderate.