Cortland is an unincorporated community in eastern Hamilton Township, Jackson County, Indiana, United States. It lies along State Road 258 northwest of the city of Seymour. Its elevation is 561 feet (171 m), and it is located at {{#invoke:Coordinates|coord}}{{#coordinates:38|58|23|N|85|57|51|W|type:city | |name= }} (38.9731084, -85.9641467). Although Cortland is unincorporated, it has a post office, with the ZIP code of 47228.