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Historical Markers in Port William
Wilmington is the county seat for Clinton County
Port William is in Clinton County
ADJACENT TO CLINTON COUNTY
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| On Main Street (Ohio Route 134) at 2nd Street, on the left when traveling north on Main Street. Reported missing. |
| On Paintersville Road (County Route 5) at Main Street ( Route 134), on the right when traveling east on Paintersville Road. |
Nov. 13, 2026