17921 is zip code located in Ashland, Pennsylvania. The population is 7,377, making 17921 the largest zipcode in Ashland and the 4th largest in Columbia County.
There are 2 public schools in 17921 with an average Homefacts rating of C-. The total crime rate for Ashland is very low , and there are 4 registered sex offenders residing in the zip code 17921. Unemployment in 17921 is very high.