  State Road 23 | ||||
|---|---|---|---|---|
| Branan Field Road Cecil Commerce Center Parkway First Coast Expressway | ||||
 Completed section of SR 23 highlighted in red | ||||
| Route information | ||||
| Maintained by Florida's Turnpike Enterprise | ||||
| Length | 11.395 mi[1] (18.338 km) | |||
| Major junctions | ||||
| South end |  SR 21 near Middleburg | |||
| North end |   I-10 / US 90 in Jacksonville | |||
| Location | ||||
| Country | United States | |||
| State | Florida | |||
| Counties | Clay, Duval | |||
| Highway system | ||||
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State Road 23 (SR 23), also known as the First Coast Expressway, is a controlled-access toll road serving as an outer bypass around the southwest quadrant of Jacksonville, Florida. As of 2024[update], the first phase has been built, linking Interstate 10 (I-10) near Whitehouse with SR 21 (Blanding Boulevard) in the Middleburg area. The second phase to Green Cove Springs is currently under construction, and is expected to be completed in the second half of 2025.
The ultimate plan is for a 46.5-mile (74.8 km) four-lane controlled-access, electronically-tolled highway between I-10 and I-95. The total investment for the entire highway is estimated at $2 billion. Construction of the final section began 2024 and is expected to be completed by 2032. It extends from near Green Cove Springs, crosses the St. Johns River, then continues east through fast-growing northern St. Johns County to a point approximately 3.5 miles (5.6 km) north of the World Golf Village interchange along I-95.