List of municipalities in Sullivan County, Pennsylvania

State law defines the two kinds of municipalities present in the county: four boroughs and nine townships.

[2] The land which became Sullivan County was purchased from the Iroquois by the Province of Pennsylvania in 1768, as part of the first Treaty of Fort Stanwix.

[5] According to the official state publication The Pennsylvania Manual (2011), Sullivan County was named for Pennsylvania state senator Charles C. Sullivan, who "took an active part in procuring passage of the bill" establishing the county.

[2] However, according to former Pennsylvania state librarian Frederic A. Godcharles (1933) and oliver P. Williams' County Courthouses of Pennsylvania: A Guide (2001), the county is named for General John Sullivan, who led the Sullivan Expedition against the Iroquois in 1779.

[8] Much of this growth was fueled by lumber-based industry, but the virgin forests were almost all gone by 1900 and the population declined in eight of eleven decades since then, decreasing by a total of 47% between 1900 and 2010.

[7][9] The map shown below is clickable; click on any municipality name to be redirected to the article for that borough or township.