Abstracted from A. J. Davis' History of Clarion County, published in 1887.
| Alum Rock Arthurs Asbury Blair's Corners Brinkerton Broken Rock Callensburg Catfish Church Clarion Curllsville East Brady Elk City Fairmount City Fern City Fisher Foxburg Frampton Frogtown Fryburg Haynie |
Helen Furnace Kingsville Knox Kossuth Lamartine Lawsonham Leatherwood Leeper Lickingville Limestone Lucinda Furnace Miola Monroe New Athens New Bethlehem Newmansville New Maysville North Pine Grove Philipston Piney Piollet |
Pollock Redbank Furnace Reidsburg Rimersburg St. Petersburg Scotch Hill Scrubridge Shannondale Shippenville Sligo Strattanville Strubleton Toby Truittsburg Turkey City Tylersburg Valley Vowinckel West Freedom West Millville West Monterey |
There were 74 post offices in the county in 1897.