Olin is an unincorporated community located in Olin Township, Iredell County, North Carolina, United States. The community is north of Statesville. The Olin post office was first established in 1852, and continues to operate with the ZIP code 28660.

History The Olin Creek, also knowns as the Middle Fork of Rocky Creek, is near where the New Institute post office was established on August 12, 1852. On February 14, 1856, this was renamed the Olin post office, after Stephen A. Olin, founder and first president of Randolph-Macon college (1832–1836). The first postmaster of Olin was William D. Watts (February 14, 1856).

The town of Olin had a prohibition of the manufacture and sale of liquor written into its charter.Keever, Homer M.; Iredell Piedmont County, with illustrations by Louise Gilbert and maps by Mildred Jenkins Miller, published for the Iredell County Bicentennial Commission by Brady Printing Company from type set by the Statesville Record and Landmark, copyright, November 1976, by Homer M. Keever; pages 179, 180, and 213Lewis, J.D.;

After Olin Township was established in 1868, Olin remained a town.

Olin United Methodist Church and Cemetery, founded in 1851, is located in Olin.

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