This is a list of the Pennsylvania state historical markers in Sullivan County.
This is intended to be a complete list of the official state historical markers placed in Sullivan 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 seven historical markers located in Sullivan County.
|Marker title||Image||Date dedicated||Location||Marker type||Topics|
|Celestia||October 22, 1999||Pa. 42 1½ miles west of Laporte
||Roadside||Early Settlement, Religion|
|Celestia||July 12, 1951||U.S. 220 just NE of Laporte
|Harold "Red" Grange||August 25, 1999||Rte. 154 off of Rte 87, Forksville
||Roadside||Agriculture, Business & Industry, Football, Sports|
|Old Woolen Factory||January 12, 1951||Junction Pa. 87 & 154, Forksville
||Roadside||Buildings, Business & Industry|
|Rural Electrification||September 25, 1987||Pa. 87 just SW of Pa. 154, Forksville
||Roadside||Business & Industry, Electricity|
|Sullivan County||August 18, 1982||Courthouse, Main & Muncy Sts., Laporte
||City||Government & Politics, Government & Politics 19th Century|
|Wyalusing Path||January 12, 1951||U.S. 220 at Neech Glen, 1 miles S of Muncy Valley
||Roadside||Native American, Paths & Trails, Transportation|