Denmark is an unincorporated community in the southwest portion of Marion Township, Owen County, in the U.S. state of Indiana. It lies near the intersection of County Road 1400 West and County Road 150 South, which is a community about fifteen miles west of the city of Spencer, the county seat of Owen County. Its elevation is 722 feet, and it is locate…Denmark is an unincorporated community in the southwest portion of Marion Township, Owen County, in the U.S. state of Indiana. It lies near the intersection of County Road 1400 West and County Road 150 South, which is a community about fifteen miles west of the city of Spencer, the county seat of Owen County. Its elevation is 722 feet, and it is located at 39°16′11″N 87°1′33″W / 39.26972°N 87.02583°W.