Seneca County, OH Elevation & Topographic Map

Topographic elevation map of Seneca County, Ohio, shaded from 640 ft on the north side to 1,000 ft on the southeast side
Elevation
1,000 ft 305 m910 ft 280 m870 ft 265 m780 ft 235 m690 ft 210 m640 ft 195 m
Contours every 500 ft, bold every 2,500 ft
USGS 3DEP · U.S. Census Bureau
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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

Seneca County averages about 810 ft (250 m) above sea level across all its land. Its ground runs from 640 ft on the north side to 1,000 ft on the southeast side.

Average elevation
810 ft 250 m
all land inside the county
Highest
1,000 ft 305 m
on the southeast side
Lowest
640 ft 195 m
on the north side

Seneca County spans about 360 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.

FigureElevation
Average of all land810 ft250 m
Highest point
Inside the county, on the southeast side
1,000 ft305 m
Lowest point
Inside the county, on the north side
640 ft195 m

Elevation profile, south to north

18 mi south to north through Tiffin.

Topographic Map

Topographic elevation map of Seneca County, Ohio, shaded from 640 ft on the north side to 1,000 ft on the southeast side
County boundary (dashed) over shaded terrain, with contours every 40 ft (12 m).
Location
County in Ohio, United States
Population
54,730 2024 est.
Land area
551.0 sq mi + 1.8 sq mi water
Density
99 per sq mi
Time zone
Eastern UTC−5 / −4
Landform region
Central Lowland
Drains to
Great Lakes
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Crawford County1,020 ft
  2. Huron County890 ft
  3. Wyandot County860 ft
  4. Hancock County810 ft
  5. Seneca County810 ft
  6. Wood County670 ft
  7. Sandusky County650 ft

Rankings by average elevation

  • Counties in Ohio66th highest of 88
  • Counties in the United States1,780th highest of 3,151
All 30 towns in Seneca County by typical elevation
  1. Attica950 ft
  2. Venice Township940 ft
  3. Bloomville930 ft
  4. Bloom Township, Seneca County930 ft
  5. Reed Township900 ft
  6. Republic880 ft
  7. Scipio Township870 ft
  8. Melmore870 ft
  9. Big Spring Township830 ft
  10. New Riegel830 ft
  11. Seneca Township810 ft
  12. Eden Township810 ft
  13. Thompson Township, Seneca County800 ft
  14. Flat Rock800 ft
  15. McCutchenville partly790 ft
  16. Adams Township, Seneca County790 ft
  17. Clinton Township, Seneca County780 ft
  18. Loudon Township780 ft
  19. Hopewell Township, Seneca County780 ft
  20. Bascom770 ft
  21. Fostoria770 ft
  22. Tiffin760 ft
  23. Jackson Township, Seneca County740 ft
  24. Kansas730 ft
  25. Liberty Township, Seneca County710 ft
  26. Bettsville700 ft
  27. Fort Seneca700 ft
  28. Green Springs700 ft
  29. Pleasant Township, Seneca County700 ft
  30. Old Fort690 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.
  • 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, 520 ft at 41.2299° N, 83.2160° 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. All public domain.