Ada County, ID Elevation & Topographic Map
Elevation
5,990 ft 1,825 m5,060 ft 1,545 m4,600 ft 1,400 m3,660 ft 1,115 m2,730 ft 835 m2,270 ft 690 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
Ada County averages about 3,050 ft (930 m) above sea level across all its land. Its ground runs from 2,270 ft on the southwest side to 5,990 ft on the northeast side.
Average elevation
3,050 ft 930 m
all land inside the county
Highest
5,990 ft 1,825 m
on the northeast side
Lowest
2,270 ft 690 m
on the southwest side
Ada County spans about 3,720 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.
| Figure | Elevation |
|---|---|
| Average of all land | 3,050 ft930 m |
| Highest point Inside the county, on the northeast side | 5,990 ft1,825 m |
| Lowest point Inside the county, on the southwest side | 2,270 ft690 m |
Elevation profile, west to east
23 mi west to east through Boise City.
Topographic Map
- Location
- County in Idaho, United States
- Population
- 535,799 2024 est.
- Land area
- 1,052.3 sq mi + 8.5 sq mi water
- Density
- 509 per sq mi
- Time zone
- Mountain UTC−7 / −6
- Landform region
- Columbia Plateau
- Drains to
- Pacific Ocean
⤓ Download this map
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Sources: U.S. Census Bureau, USGS
Nearby Places
Neighboring counties sharing a border, by average
- Boise County5,520 ft
- Owyhee County4,800 ft
- Elmore County4,740 ft
- Gem County3,570 ft
- Ada County3,050 ft
- Canyon County2,480 ft
Rankings by average elevation
- Counties in Idaho39th highest of 44
- Counties in the United States376th highest of 3,151
Peaks and hills highest inside
- Shaw Mountain5,907 ft
- Table Rock, Ada County3,660 ft
- Big Foot Butte3,538 ft
- Christmas Mountain3,502 ft
- Cinder Cone Butte3,430 ft
All 8 towns in Ada County by typical elevation
- Avimor3,300 ft
- Hidden Springs2,910 ft
- Boise City2,710 ft
- Kuna2,690 ft
- Garden City2,610 ft
- Meridian2,590 ft
- Eagle2,570 ft
- Star2,470 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 1 arc-second (≈100 ft, 30 m) grid. Land means the boundary minus Census area water.
- Highest and lowest: the highest land cell. Lowest: the lowest land cell; coastal ground within 3 ft (1 m) of named tidal water counts as sea level.
- 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. All public domain.