U.S. Route 23 in Florida

U.S. Highway 23 marker
U.S. Highway 23
Map
US 23 highlighted in red
Route information
Maintained by FDOT
Length37.656 mi[1] (60.601 km)
Existed1950–present
Major junctions
South end US 1 / US 17 / SR 228 in Jacksonville
Major intersections
North end US 1 / US 23 / US 301 / SR 4 / SR 15 towards Folkston, GA
Location
CountryUnited States
StateFlorida
CountiesDuval, Nassau
Highway system
SR 22 SR 23
SR 136SR 139 SR 143

U.S. Highway 23 (US 23) is a United States Numbered Highway that runs from Jacksonville, Florida, to Mackinaw City, Michigan. In the U.S. state of Florida, US 23 is concurrent with US 1 south of Alma, Georgia, except in Downtown Jacksonville. US 23 is also concurrent with US 301 between Homeland, Georgia, and Callahan. In the Jacksonville area, US 23 is the unsigned State Road 139 (SR 139), which also continues east from the south end of US 23 along SR 10A to SR 115 near the Mathews Bridge.

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