Petersville is located at the junction of Maryland routes 79 and 180, 1.3 miles (2.1 km) northeast of Rosemont.
The village of Petersville has a long and prominent heritage in the history of Frederick County and the State of Maryland.
The land on which Petersville is situated was originally patented by Captain John Colvill as the "Merryland Tract" on November 5, 1731, containing over 6,000 acres.
[2] Shortly after the Revolutionary War, Petersville began to develop as a village, with lots facing the turnpike route and four cross streets.
The village also sat at the crossroads of one of the valley's north-south roads leading from Middletown to Berlin (today Brunswick).