51521 is zip code located in Avoca, Iowa. The population is 1,831, making 51521 the largest zipcode in Avoca and the 7th largest in Pottawattamie County.
There are 2 public schools in 51521 with an average Homefacts rating of B-. , and there are 8 registered sex offenders residing in the zip code 51521. Unemployment in 51521 is moderate.