49931 is zip code located in Houghton, Michigan. The population is 9,824, making 49931 the largest zipcode in Houghton and the largest in Houghton County.
There are 3 public schools in 49931 with an average Homefacts rating of A. The total crime rate for Houghton is low , and there are 7 registered sex offenders residing in the zip code 49931. Unemployment in 49931 is very high.