61531 is zip code located in Farmington, Illinois. The population is 3,329, making 61531 the largest zipcode in Farmington.
There are 3 public schools in 61531 with an average Homefacts rating of B-. The total crime rate for Farmington is moderate , and there are 0 registered sex offenders residing in the zip code 61531. Unemployment in 61531 is high.