Zip code 61103

Zip code 61103, IL

The zip code 61103, type standard, belongs to the following denominations: Rockford, Machesney Park, Machesney Pk . It is part of the county Winnebago County, state of Illinois. It has an estimated population of 18930.

The postal code 61103 has several names. If you are going to use the postal service be sure to use only those denominations marked as official (Rockford) or acceptable (Machesney Park, Machesney Pk).