# List of Pennsylvania state historical markers in Mercer County

This is a list of the Pennsylvania state historical markers in Mercer County.
This is intended to be a complete list of the official state historical markers placed in Mercer County, Pennsylvania by the Pennsylvania Historical and Museum Commission (PHMC). The locations of the historical markers, as well as the latitude and longitude coordinates as provided by the PHMC's database, are included below when available. There are 19 historical markers located in Mercer County.
Download coordinates as:
* KML
* GPX (all coordinates)
* GPX (primary coordinates)
* GPX (secondary coordinates)

## Historical markers

| Marker title | Date dedicated | Location | Marker type | Topics |
| Albert Bushnell Hart | April 30, 1948 | S side PA 258 at PA 18, across from Tara restaurant, just N of Sharpsville 41°17′00″N 80°25′43″W﻿ / ﻿41.28335°N 80.42853°W﻿ / 41.28335; -80.42853﻿ (Albert Bushnell Hart) | Roadside | Education, Professions & Vocations |
| Bigler Graves | November 12, 1946 | PA 58 (628 Mercer Rd.) at Salem Rd., SE of Greenville 41°21′47″N 80°21′18″W﻿ / ﻿41.36298°N 80.35499°W﻿ / 41.36298; -80.35499﻿ (Bigler Graves) | Roadside | Government & Politics, Government & Politics 19th Century, Governors |
| Bigler Home | November 12, 1946 | Pa. 58 SE of Greenville (MISSING) | Roadside | Government & Politics, Government & Politics 19th Century, Governors |
| Camp Reynolds | September 1, 1994 | Rte. 18 S of Greenville (MISSING) | Roadside | Military, Military Post-Civil War |
| Clay Furnace | January 20, 1949 | N side of US 62 at Clay Furnace Rd., W of Charleston 41°14′15″N 80°23′05″W﻿ / ﻿41.23742°N 80.38486°W﻿ / 41.23742; -80.38486﻿ (Clay Furnace) | Roadside | Business & Industry, Coal, Furnaces, Iron |
| Erie Extension Canal | April 30, 1948 | Wasser Bridge Rd. (SR 4003) just E of Pa. 18, S of Greenville (Missing) | Roadside | Canals, Environment, Navigation, Transportation |
| Erie Extension Canal | November 12, 1946 | PA 18 & 518 (Lamar Rd.), Lamonts Corners, east of Sharpsville 41°15′26″N 80°27′10″W﻿ / ﻿41.25722°N 80.45276°W﻿ / 41.25722; -80.45276﻿ (Erie Extension Canal) | Roadside | Canals, Navigation, Transportation |
| Erie Extension Canal | November 12, 1947 | Wasser Bridge Road, .3 mile E of Pa. 18, S of Greenville (Missing) | Roadside | Canals, Environment, Navigation, Transportation |
| Freedom Road | August 23, 1948 | US 62, across from Great Stoneboro Fair, SW of Sandy Lake 41°20′07″N 80°05′50″W﻿ / ﻿41.33535°N 80.09734°W﻿ / 41.33535; -80.09734﻿ (Freedom Road) | Roadside | African American, Underground Railroad, Women |
| General Hugh Mercer - PLAQUE | n/a | N Diamond St., N side of Co. courthouse, right column support, Mercer 41°13′38″N 80°14′21″W﻿ / ﻿41.22717°N 80.23911°W﻿ / 41.22717; -80.23911﻿ (General Hugh Mercer - PLAQUE) | Plaque | American Revolution, Forts, French & Indian War, Military |
| James Sheakley | March 6, 1967 | E side of US 19, across from church, N end of Sheakleyville 40°26′43″N 79°59′08″W﻿ / ﻿40.44521°N 79.98542°W﻿ / 40.44521; -79.98542﻿ (James Sheakley) | Roadside | Government & Politics, Government & Politics 19th Century |
| Johnston Tavern | August 24, 1948 | US 19 (across from 1561 Perry Hwy.), near Dydek's Lane, N of Leesburg 41°09′00″N 80°13′24″W﻿ / ﻿41.14998°N 80.22333°W﻿ / 41.14998; -80.22333﻿ (Johnston Tavern) | Roadside | Buildings, Business & Industry, Inns & Taverns |
| Kidd's Mill Covered Bridge | July 15, 1995 | SR 4012 at Kidd's Mill Rd. (Kidd's Mill State Park), 5 miles S of Greenville 41°21′17″N 80°23′50″W﻿ / ﻿41.35481°N 80.39709°W﻿ / 41.35481; -80.39709﻿ (Kidd's Mill Covered Bridge) | Roadside | Bridges, Transportation |
| Mercer County | May 12, 1983 | N Diamond St. at N side of Co courthouse, at Courthouse Square, Mercer 40°26′43″N 79°59′08″W﻿ / ﻿40.44521°N 79.98542°W﻿ / 40.44521; -79.98542﻿ (Mercer County) | City | Government & Politics, Government & Politics 19th Century |
| Pennsylvania | n/a | S side of Tamarack Dr. (Rt. 718), Five Points, NW of Sharpsville, at state line 41°18′38″N 80°31′05″W﻿ / ﻿41.31065°N 80.5181°W﻿ / 41.31065; -80.5181﻿ (Pennsylvania) | Roadside | Early Settlement, Government & Politics, Government & Politics 17th Century, William Penn |
| Pennsylvania | January 1, 1948 | SR 358 (Vernon Rd.) at state line, ~3 miles W of Maysville 41°23′14″N 80°31′07″W﻿ / ﻿41.38729°N 80.51867°W﻿ / 41.38729; -80.51867﻿ (Pennsylvania) | Roadside | Government & Politics 17th Century, Government & Politics 18th Century, William Penn |
| Pymatuning | November 12, 1946 | Pa. 258 E of Clark (Missing) | Roadside | Early Settlement, Native American |
| Pymatuning | November 12, 1946 | Pa. 258 E of Clark (Missing) | Roadside | Early Settlement, Native American |
| Shenango Town | March 14, 1947 | Pa. 118 SE of West Middlesex (Missing) | Roadside | Cities & Towns, Early Settlement, Native American |