U.S. Federal Route 23 is a north-south highway in Eastern Alcona County. It runs from the Alcona/Iosoco County Line, north of Oscoda, to the Alcona/Alpena County Line, south of Ossineke. U.S. Rt. 23 passes through the following towns in Alcona County. Greenbush Harrisville
U.S. Rt. 23 is not multi-plexed in Alcona County. U.S. Rt. 23 intersects the following highways in Alcona County. Michigan State Route 72, at Harrisville.
NB U.S. Rt. 23 north of Greenbush. NB U.S. Rt. 23 south of Harrisburg. NB U.S. Rt. 23 near Clark Road. NB U.S. Rt. 23 at MI St Rt 72. A guide marker on EB MI St Rt 72. NB U.S. Rt. 23 north of Harrisville. NB U.S. Rt. 23 near Trask Lake Road. NB U.S. Rt. 23 near Beaton Road.
