|Maintained by FDOT|
|Length||32.288 mi (51.962 km)|
|Existed||1945 renumbering (definition) - present|
|South end||/ near Green Cove Springs|
|North end||Downtown Jacksonville|
State Road 13 (SR 13) is a 28.25-mile-long (45.46 km) state highway in the U.S. state of Florida, running north from SR 16 near Green Cove Springs, through Switzerland to Jacksonville on the east shore of the St. Johns River.
Its southern terminus is with SR 16 and County Road 13 (CR 13) near Green Cove Springs. CR 13 continues south to Hastings and then southeast, along old Dixie Highway to US 1 (unsigned SR 5) near Bunnell.
SR 13 is known as San Jose Boulevard for much of its run through Duval County (coextensive with the city limits of Jacksonville). As it approaches Downtown Jacksonville, it becomes Hendricks Avenue, then turns west along Prudential Drive and then turns into San Marco Boulevard before crossing the St. Johns River at the Acosta Bridge. The road ends at an interchange with Riverside Avenue (former US 17).
|St. Johns||Wards Creek||0.000||0.000||east / south to - St. Augustine, Hastings||south end of SR 16 overlap|
|3.998||6.434||west to - Green Cove Springs||north end of SR 16 overlap|
|Orangedale||5.356||8.620||east / east - St. Augustine|
|Fruit Cove||16.303||26.237||Race Track Road / Fruit Cove Road|
|Duval||Jacksonville||20.66||33.25||(SR 9A) - St. Augustine, Orange Park||Exit 5 on I-295|
|22.488||36.191||Sunbeam Road||former SR 116|
|23.307||37.509||east (Baymeadows Road)||Western terminus of SR 152|
|26.990||43.436||east (University Boulevard)||Western terminus of SR 109|
|28.676||46.150||east (Emerson Street)||Western terminus of SR 126|
|30.056||48.370||To north / San Marco Boulevard|
|30.818||49.597||Gary Street||ramp from US 1 south / US 90 east|
|31.003||49.894||south / east (Prudential Drive / SR 5 south)||south end of US 1 / US 90 / SR 5 / overlap|
|31.28||50.34||north / west (Main Street / SR 5 north / SR 10 west) to south (SR 10 east)||interchange; north end of US 1 / US 90 / SR 5 overlap|
|31.367||50.480||To / south / east / west / San Marco Boulevard - Beaches||interchange|
|31.8||51.2||Acosta Bridge over St. Johns River|
|32.288||51.962||To / Riverside Avenue / Broad Street / Water Street - Convention Center||interchange; former US 17 / SR 15 / SR 228|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
County Road 13 (CR 13) is a road in western St. Johns County, Florida that runs from its southern terminus of US 1 near Bunnell, traveling northwest along old Dixie Highway until it reaches Hastings. North of Hastings, it travels along the St. Johns River until it reaches its northern terminus at SR 13 and SR 16.
County Road 13B (CR 13B) is a county-suffixed local route on the west side of SR 13, named Fruit Cove Rd in Fruit Cove.