River
St. Johns River
499 km from source to mouth · United States.
United StatesFlows into Atlantic Ocean
In numbers
Length
499km
Average flow
420m³/s
Basin
22,895km²
Drop
9m
from 6 m to -3 m
Country
1
The journey
From source to mouth
499 km of river and 36 stops on the way: 7 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmSourceat 6 m
- 19 kmLake Hell 'n Blazes0.8 km²
- 40 kmLake Washington11 km²
- 64 kmLake Winder5.8 km²
- 81 kmLake Poinsett15 km²
- 137 kmPuzzle Lake2.0 km²
- 151 kmLake Harney23 km²
- 172 kmLake Jesup31 km²
- 176 kmOsteen Bridge
- 191 kmLake Monroe33 km²
- 191 kmSt. Johns River Veterans Memorial Bridge
- 192 kmLake Monroe Bridge
- 192 kmSanford Railroad Bridge
- 200 kmWekiva Rivertributary
- 221 kmFrancis P. Whitehair Bridge
- 251 kmAstor Bridge
- 286 kmLake George185 km²
- 300 kmOcklawaha Rivertributary
- 339 kmMemorial Bridge
- 340 kmPalatka10,390 people
- 395 kmShands Bridge
- 403 kmGreen Cove Springs7,277 people
- 417 kmFruit Cove29,362 people
- 423 kmOrange Park8,702 people
- 428 kmBuckman Bridge
- 447 kmFuller Warren Bridge
- 448 kmFEC Strauss Trunnion Bascule Bridge
- 448 kmAcosta Bridge
- 448 kmDowntown Jacksonville8,000 people
- 448 kmMain Street Bridge
- 450 kmJacksonville949,611 people
- 452 kmHart Bridge
- 454 kmMathews Bridge
- 471 kmDames Point Bridge
- 477 kmBlount Island45 people
- 489 kmCharles E. Bennett Memorial Bridge
- 490 kmKingsley Plantation
- 499 kmAtlantic Oceanat -3 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in Florida, United States
At the mouth it carries 425 m³/s on average: an Olympic pool every 5.9 seconds. Its basin covers 22,895 km², about the size of BZ. 3.4 million people live in it. Highest water: from August to September. Its dams hold back little of its water (6.3% of a year's flow).
Where to start
- JacksonvilleLargest city on its banks · 949,611 people
- Jacksonville International Airport (JAX)Nearest airport with scheduled flights, 20 km from the cityCar hire at JAX airport (Jacksonville)Discover Cars · Affiliate link↗
- On the water107 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- From November to February and AprilThe best months to visit
St. Johns River, month by month
Highest water: from August to September
Best months to visit: from November to February and April.
From about 210 m³/s in the lowest month to 260 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.
Plan the trip
Plan the trip: boat trips, a bed by the river, a car
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
The basin
St. Johns River: the basin in numbers
24,673 km² of land send their water to this river. This is what lives on it.
- 3.4millionpeople live in the basin
- 150/km²people per km²
- 22maverage altitude of the basin
- 1,290mmof rain a year (basin average)
- 21.2°Caverage air temperature
- 3%protected areas
- 4.7%covered by lakes
- 0.5km³held in reservoirs
What covers the basin
- 51% Forest
- 7% Cropland
- 18% Pasture
- 13% Towns and cities
RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.
Along the river
St. Johns River: what you find on the way
- 2Weirs
- 3LocksBuckman Lock, Cross-Florida Barge Canal
- 5Waterfalls
- 34Boat rampsHighway 50 Boat Ramp, Lake Monroe Wayside Boat Ramp, Boat Ramp and 31 more
- 8Ferry piersFort George Island, Mayport Village and 6 more
- 64MarinasFree Marina Day Slips, Monroe Harbour Marina, Riviera Resort and Marina and 61 more
- 1River beachesShee Beach
From OpenStreetMap, within 2.0 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
St. Johns River in our other atlases
What our sister atlases know about the waterfalls on this river, the lakes it flows through, the beaches at its mouth, the mountains where it rises and the islands off its mouth.
9lakes on its wayLakeyas
1beach at the mouth or on the banksCoastya
1island off the mouthIslandyas
Lakes and reservoirs (9)
Lakes it flows through, by Lakeyas
- Lake Washingtonkm 34 · 4 m deep11km²
- Lake Winderkm 535.8km²
- Lake Poinsettkm 6815km²
- Puzzle Lakekm 1152.0km²
- Lake Harneykm 12723km²
- Lake Jesupkm 14531km²
- Lake Monroekm 16033km²
- Lake Georgekm 240 · 2 m deep185km²
1 more on LakeyasLakeyas is coming soonOpen Lakeyas ↗
Beaches (1)
At the mouth (25 km) and on the banks, by Coastya
- Seminole Beach3.8 km away28.0°C
Islands off the mouth (1)
Within 30 km of the mouth, by Islandyas
- Amelia Island24 km away47km²
Islandyas is coming soonOpen Islandyas ↗
From space
The source and the mouth, seen from orbit
Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.
Photos
St. Johns River in pictures
Tributaries
Where it flows, and what flows into it
Tributaries (7)
Also: Ocklawaha River, Wekiva River, Econlockhatchee River, Hontoon Dead River, Black Creek, Pottsburg Creek, Trout River
Where these numbers come from
| Name, length, places | Wikidata (Q1677915) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata |
| Flow | WaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0 |
| Climate along the river | WorldClim (RiverATLAS), 1970–2000 · CC BY 4.0 |
| Towns, bridges, dams | Wikidata · CC0; GeoNames · CC BY 4.0 |
| Along the river | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Our other atlases | Lakeyas, Coastya, Islandyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; HydroLAKES · CC BY 4.0; NOAA OISST |
Every source and licence is on the data sources page.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.
beaches
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Every lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit 
mountains
Every summit in 3D: summit weather, the 0 °C line, huts and trails.Visit 
waterfalls
Every waterfall: height, flow month by month and when it roars.Coming soonVisit islands
Every island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit 
rivers
Every river from source to sea: the journey, the flow and the basin in numbers.You are here
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Every canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit