21917 is zip code located in Colora, Maryland. The population is 2,455, making 21917 the largest zipcode in Colora and the 9th largest in Cecil County.
There are 0 public schools in 21917 with an average Homefacts rating of NA. , and there are 1 registered sex offenders residing in the zip code 21917. Unemployment in 21917 is very high.