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MASON COUNTY,
ILLINOIS
ZIP Code
Post Office
Date Established
Date Discontinued
62617
BATH
09/07/1843
62633
EASTON
05/08/1873
61532
FOREST CITY
09/24/1861
62644
HAVANA
62655
KILBOURNE
61546
MANITO
62664
MASON CITY
62682
SAN JOSE
61567
TOPEKA
06/14/1861
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