U.S. Route 223

U.S. Route 223

US Route 223 or US Highway 223 (US 223) is a diagonal (northwest–southeast) US Highway lying in the US states of Michigan and Ohio. The southern most section is completely concurrent with the US 23 freeway, including all of the Ohio segment. It connects US 23 in the south near Toledo, Ohio with US 127 and US 12 south of Jackson, Michigan. The highway passes through farmland in southern Michigan and woodland in the Irish Hills. Including the concurrencies on each end, US 223 is 47.11 miles (75.82 km) in total length.

The highway designation was created in 1930 out of the southern end of US 127. Three sets of reroutings through Adrian have resulted in the creation of two different business loops through the city. A change proposed in the 1960s and implemented in the 1970s shifted the southern end of US 223 to replace M-151 and then run along the US 23 freeway between Whiteford Township, Michigan and Sylvania, Ohio. Since the 1980s, US 223 no longer reaches Toledo, Ohio, instead feeding into the freeway system of greater Toledo. Changes proposed and enacted into law in the 1990s would upgrade the highway as an Interstate Highway. Congress has designated this corridor as part of Interstate 73 (I-73), although neither state intends at this time to complete the freeway.