M-125 (Michigan highway)

M-125
M-125 highlighted in red
Route information
Maintained by MDOT
Length	19.480 mi[1] (31.350 km)
Existed	1973[2][3]–present
Tourist routes	Monroe Historic Heritage Route
Major junctions
South end	Ohio state line near Toledo, Ohio
Major intersections	Summit Street in Erie Township Luna Pier Road in Erie Township
North end	US 24 near Monroe
Location
Country	United States
State	Michigan
Counties	Monroe
Highway system
Michigan State Trunkline Highway System Interstate US State Byways
← M-124 → M-126

M-125 is a 19+1⁄2-mile-long (31.4 km) state trunkline highway in the US state of Michigan. The highway is entirely within Monroe County with the southern terminus on the Ohio state border near Toledo and a northern terminus at US Highway 24 (US 24) in Frenchtown Township, 5 miles (8.0 km) north of Monroe. M-125 runs through rural farmlands and connects a couple of smaller towns with Monroe. It has an unsigned connector highway that links the main highway with Interstate 75 (I-75).

The highway is a section of the former Dixie Highway and US 25 in the state. It was first added to the state highway system in 1926 and given its current number in 1973. Previously there were two other highways that carried the M-125 moniker. One in the 1930s ran through the Upper Peninsula near Thompson and a second from 1938 until the mid-1950s was located in Bay County. The current designation was created in 1973 when US 25 was decommissioned in Michigan. The section in downtown Monroe was named what is now a Pure Michigan Byway in 1995.