Post Offices Prairie Farm - from 1852-1854
Gillespie - from 1854 to Present
Postal Zip Code = 6 2 0 3 3
Telephone Area Code = 2 1 7
Elevation = 663 feet
Latitude = 39.13
Longitude = 89.82
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Gillespie's history is basically comprised of coal mining, but also has strong agricultural roots,
including both grain and livestock farming.
Gillespie has an annual Black Diamond Days festival which is held on Macoupin Street
the weekend immediately following Memorial Day.
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