Monroe County, FL Elevation & Topographic Map
Elevation
85 ft 26 m63 ft 19 m51 ft 16 m29 ft 9 m6 ft 2 m−5 ft −2 m
Zoom in for contour lines
USGS 3DEP · U.S. Census Bureau
How to use this mapviews, tools and data
- Elevation
- Ground colored by height from green (lowest) to white (highest), with contour lines every 40–500 ft (USGS data).
- Satellite
- A 2016 satellite photo at 33 ft (10 m) detail; contours off.
- 3D
- Tilt and turn the terrain; hills are raised 1.5×, or set ×1 for true height.
- Click or tap anywhere
- The exact elevation of that spot in ft and m.
- Measure
- Pick two points for the climb, descent and grade along a straight line.
- County area
- Fades everything outside the official county boundary (US Census).
Elevation Data
Monroe County averages about 1 ft (0 m) above sea level across all its land. Its ground runs from 5 ft below sea level on the northeast side to 85 ft on the southwest side.
Average elevation
1 ft 0 m
all land inside the county
Highest
85 ft 26 m
on the southwest side
Lowest
−5 ft −2 m
on the northeast side
Monroe County spans about 90 ft of height, so no single spot tells the whole story. The ruler shows where most of its land lies, and where the other numbers you'll see come from.
52% of Monroe County's land lies below the average daily high tide (MHHW, NOAA), and 38% lies less than 3 ft above it. Check flood zones on FEMA's map
| Figure | Elevation |
|---|---|
| Average of all land | 1 ft0 m |
| Highest point Inside the county, on the southwest side | 85 ft26 m |
| Lowest point Inside the county, on the northeast side | −5 ft−2 m |
Topographic Map
- Location
- County in Florida, United States
- Population
- 80,908 2024 est.
- Land area
- 983.0 sq mi + 4,306.5 sq mi water
- Density
- 82 per sq mi
- Time zone
- Eastern UTC−5 / −4
- Landform region
- Coastal Plain 87%
- Drains to
- Gulf of America 88%, Atlantic Ocean 13%
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Sources: U.S. Census Bureau, USGS
Nearby Places
Neighboring counties sharing a border, by average
- Collier County11 ft
- Miami-Dade County5 ft
- Monroe County1 ft
Rankings by average elevation
- Counties in Floridalowest of 66
- Counties in the United States3,145th highest of 3,151
Peaks and hills highest inside
- Basin Hills42 ft
- Johnson Mound10 ft
- Hamilton Mound9 ft
- Sandy Mound5 ft
- Bear Lake Mound3 ft
All 13 towns in Monroe County by typical elevation
- North Key Largo4 ft
- Key Largo4 ft
- Islamorada, Village of Islands3 ft
- Tavernier3 ft
- Key West3 ft
- Duck Key3 ft
- Big Coppitt Key3 ft
- Key Colony Beach3 ft
- Marathon3 ft
- Stock Island2 ft
- Big Pine Key2 ft
- Cudjoe Key2 ft
- Layton1 ft
How we measure
- Average: every USGS 3DEP bare-earth cell of land inside the Census county boundary (TIGER/Line, Jan 1 2026), weighted equally, on a 3 arc-second (≈300 ft, 93 m) grid, coarsened from 1 arc-second so the whole area fits one run. Land means the boundary minus Census area water (on this grid, water areas of at least half a cell).
- Highest and lowest: the highest land cell, re-read at 1 arc-second around the 25 highest grid cells. Lowest: the lowest land cell, re-read at 1 arc-second around the 25 lowest grid cells; coastal ground within 3 ft (1 m) of named tidal water counts as sea level.
- Pits: the lowest point is the lowest ground outside closed hollows (quarry floors, mine pits, terrain-model artifacts): any hollow under 0.4 sq mi (1 km²), and any hollow under 2 sq mi (5 km²) whose floor is more than 100 ft (30 m) below its rim; and outside patches below sea level of under 0.4 sq mi (1 km²). The single lowest 3DEP cell, −20 ft at 24.6104° N, 81.6504° W, is in such a hollow or patch and is not counted.
- Nearby Places: neighboring counties and rankings use each one's average elevation, on its own grid, the same figure its page shows. Peaks and hills: the highest summits inside the county with at least 980 ft (300 m) of prominence, then the highest federal (GNIS) summits inside it when there are fewer than 5; each is the 3DEP top on a ~7 ft (2 m) window, or the NGS published height when a usable survey mark sits within 160 ft (50 m) of it (shown as published).
- Towns: each town's typical elevation (population-weighted median of its own 2020 blocks at 1 arc-second); a town is listed when any of its 2020 residents live in the county.
- Rounding: computed heights are rounded to 10 ft (5 m), or to 1 ft (1 m) under 100 ft; 3DEP is good to about a meter, not a foot. Published figures (NGS survey heights) are shown as their publisher gives them.
- Datum: North American Vertical Datum of 1988 (NAVD 88). NGS plans to replace NAVD 88 with a new datum (NAPGD2022); heights will then shift slightly.
- Sources: USGS 3DEP, GNIS, Watershed Boundary Dataset and physiographic provinces; U.S. Census Bureau (TIGER boundaries and water, 2020 blocks, 2024 population estimates, county adjacency); NOAA NGS survey heights; BTS time zones; NOAA tidal surfaces (MHHW). All public domain.