57049 is zip code located in North Sioux City, South Dakota. The population is 5,751, making 57049 the largest zipcode in North Sioux City and the largest in Union County.
There are 4 public schools in 57049 with an average Homefacts rating of B. The total crime rate for North Sioux City is very low , and there are 12 registered sex offenders residing in the zip code 57049. Unemployment in 57049 is low.