Harlan is an unincorporated town in Springfield Township, Allen County, Indiana, United States. As of the 2010 Census, Harlan has a population of 1,634. Present-day Harlan is the mergance of the towns of Harlan and Maysville. The border between the two towns was Georgetown Road (Indiana State Road 37) with Harlan being on the north side of the road.
Maysville faded from existence when the post office was built in Harlan sometime around the turn of the 20th century.
Harlan is located at 41°11′46″N 84°55′11″W / 41.19611°N 84.91972°W / 41.19611; -84.91972. It is located on State Road 37, approximately 15 miles (24 km) northeast of Fort Wayne and 7 miles (11 km) west of the Ohio state line.