15478 is zip code located in Smithfield, Pennsylvania. The population is 6,636, making 15478 the largest zipcode in Smithfield and the 5th largest in Fayette County.
There are 0 public schools in 15478 with an average Homefacts rating of NA. , and there are 11 registered sex offenders residing in the zip code 15478. Unemployment in 15478 is high.