ZIP codes in Winnebago County
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- 61016 Cherry ValleyWinnebago County
- 61024 DurandWinnebago County
- 61063 PecatonicaWinnebago County
- 61072 RocktonWinnebago County
- 61073 RoscoeWinnebago County
- 61077 SewardWinnebago County
- 61079 ShirlandWinnebago County
- 61080 South BeloitWinnebago County
- 61088 RockfordWinnebago County
- 61101 RockfordWinnebago County
- 61102 RockfordWinnebago County
- 61103 RockfordWinnebago County
- 61104 RockfordWinnebago County
- 61107 RockfordWinnebago County
- 61108 RockfordWinnebago County
- 61109 RockfordWinnebago County
- 61111 Loves ParkWinnebago County
- 61112 RockfordWinnebago County
- 61114 RockfordWinnebago County
- 61115 Machesney ParkWinnebago County