50401 is zip code located in Mason City, Iowa. The population is 29,617, making 50401 the largest zipcode in Mason City and the largest in Cerro Gordo County.
There are 8 public schools in 50401 with an average Homefacts rating of C. The total crime rate for Mason City is moderate , and there are 87 registered sex offenders residing in the zip code 50401. Unemployment in 50401 is moderate.
Zip codes within Mason City include 50402.