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Post Offices by County
KNOX COUNTY,
ILLINOIS
ZIP Code
Post Office
Date Established
Date Discontinued
61410
ABINGDON
06/30/1837
61414
ALTONA
61428
DAHINDA
02/14/1888
61430
EAST GALESBURG
61401
GALESBURG
09/20/1837
61436
GILSON
61439
HENDERSON
05/01/1837
61448
KNOXVILLE
61458
MAQUON
05/05/1837
61467
ONEIDA
61472
RIO
61474
SAINT AUGUSTINE
09/13/1837
61485
VICTORIA
12/06/1837
61488
WATAGA
11/17/1853
61489
WILLIAMSFIELD
03/01/1888
61572
YATES CITY
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