Portsmouth, OH GIS Map
Portsmouth is a city in Scioto County, Ohio, with a population of about 20,226. The map below shows its location, boundary and surrounding roads, with federal GIS layers you can turn on for the area.
- County
- Scioto County
- Population
- 20,226
- Elevation
- 534 ft
- Coordinates
- 38.7318, -82.9977
- ZIP code
- 45662
- Land area
- 10.7 sq mi
- Time zone
- America/New York
About Portsmouth, OH
Portsmouth is a city in Scioto County, Ohio, United States, and its county seat. Located in southern Ohio 41 miles (66 km) south of Chillicothe, it lies on the north bank of the Ohio River, across from Kentucky and just east of the mouth of the Scioto River. The population was 18,252 at the 2020 census. It is the principal city of the Portsmouth micropolitan area.
Source: Wikipedia (CC BY-SA 4.0)
Cities Near Portsmouth
GIS Data for Portsmouth, OH
The Portsmouth map loads live federal GIS layers in your browser, so you can check flood zones, terrain, land cover and district boundaries for any address in Portsmouth without a separate GIS login. Everything below is drawn from public U.S. government data.
Layers you can turn on
FEMA flood zones
National Flood Hazard Layer — flood insurance rate map zones.
Elevation contours and hillshade
USGS 3DEP terrain, so you can read slope and relief.
Land cover
NLCD land cover classes — forest, developed, wetland, water.
School districts
Census TIGER unified and elementary school district boundaries.
ZIP code and county boundaries
Census TIGER ZCTA and county boundary lines.
Map tools
Measure distance and area
Draw a line or polygon to get length in miles or area in acres.
Sketch and annotate
Add points, lines and shapes on top of the map.
Inspect any point
Click the map to read coordinates, elevation and the layers under your cursor.
Download the map
Save the current view as a PNG image.
Portsmouth Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
17,728
Households
7,334
Median household income
$34,713
Median age
39 years
Median home value
$103,300
Median gross rent
$747/mo
Owner-occupied homes
48.1%
Bachelor's degree or higher
17.4%
Below poverty level
35.4%
Land area
10.7 sq mi
Population density
1,652 / sq mi
County
ZIP codes in Portsmouth
Portsmouth Population Growth
Source: U.S. Census Bureau, 2010 Census and Population Estimates Program (Vintage 2024: April 2020 estimates base and July 1, 2024 estimate).
2010 Census
20,226
April 2020 (estimates base)
18,253
July 2024 estimate
17,489
Change 2010-2020
-9.8%
Change 2020-2024
-4.2%
Photos of Portsmouth
Hover over a photo to see it larger. Tap on mobile.
Photos from Wikimedia Commons, taken in or near Portsmouth. Credits and licenses are shown in the larger view.
Federal Buildings & Leases in Portsmouth
GSA-managed federal properties in and around Portsmouth.
| Property | Address | Status | Sq ft | Lease ends |
|---|---|---|---|---|
| Portsmouth Oh (921 4th St) SSA | 921 4th St, 45662 | Leased | 8,682 | Aug 2033 |
| Portsmouth Oh (822 4th St) SSA Building | 822 4th St Suite B, 45662 | Leased | 2,759 | Jul 2033 |
Source: U.S. GSA Inventory of Owned and Leased Properties (data.gov), September 2026.
Soils of Portsmouth
General soil map unit at the city center: Wheeling-Weinbach-Peoga-Nolin-Elkinsville
Soil Properties
- Drainage class
- Well drained
- Hydrologic soil group
- B (moderate infiltration)
- Available water storage (0–150 cm)
- 26.6 cm
- Typical slope
- 5%
- Flooding frequency
- None
- Min. annual water table depth
- 61 cm
Soil Components
- Elkinsville25%
Alfisols · Ultic Hapludalfs
- Weinbach15%
Alfisols · Aeric Fragiaqualfs
- Nolin12%
Inceptisols · Dystric Fluventic Eutrudepts
- Wheeling11%
Alfisols · Ultic Hapludalfs
- Peoga10%
Alfisols · Fragic Epiaqualfs
- Sardinia7%
Alfisols · Aquic Hapludalfs
Source: USDA NRCS U.S. General Soil Map (STATSGO2). General soil map data (1:250,000 scale) is not suitable for site-specific decisions.
Climate of Portsmouth
30-year averages (1991–2020) from the Portsmouth-Sciotoville, Oh weather station, elevation 540 ft, 6.2 miles from the city center.
Warmest month
Jul · avg high 87°F
Coldest month
Jan · avg low 23°F
Annual precipitation
43.1 in
Average Monthly Temperatures (°F)
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 41 | 45 | 55 | 67 | 76 | 83 | 87 | 86 | 80 | 69 | 56 | 46 |
| Avg low °F | 23 | 25 | 33 | 42 | 52 | 61 | 65 | 63 | 56 | 44 | 33 | 28 |
| Precip. in | 3.09 | 3.00 | 4.12 | 3.95 | 4.60 | 4.14 | 4.42 | 3.27 | 3.30 | 2.95 | 2.75 | 3.50 |
Source: NOAA NCEI U.S. Climate Normals, 1991–2020. Conditions at the station may differ from other parts of the city.
Natural Hazard Risk in Portsmouth
FEMA National Risk Index ratings for Scioto County, compared with all U.S. counties.
Overall risk
Score 70.2 of 100
Expected annual loss
Buildings, population & agriculture
Social vulnerability
Susceptibility to hazard impacts
Community resilience
Ability to prepare & recover
Risk by Hazard
- Heat WaveRelatively Moderate
- LandslideRelatively Low
- Inland FloodingRelatively Moderate
- Strong WindRelatively Moderate
- Winter WeatherRelatively Moderate
- LightningRelatively Moderate
- Ice StormRelatively Moderate
- EarthquakeRelatively Low
- TornadoRelatively Low
- HurricaneVery Low
- WildfireVery Low
- HailVery Low
- DroughtVery Low
- Cold WaveVery Low
Source: FEMA National Risk Index (December 2025 release). County-level ratings are relative to other U.S. counties and are not a property-specific assessment.
Portsmouth FAQ
What county is Portsmouth in?
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Portsmouth, Ohio is located in Scioto County.
What is the population of Portsmouth?
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Portsmouth has a population of about 20,226, making it the number 46 of the 52 Ohio cities listed on GIS Map.
What is the elevation of Portsmouth?
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The elevation of Portsmouth is approximately 534 feet (163 meters) above sea level at the city center.
What ZIP codes are in Portsmouth?
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The ZIP code for Portsmouth is 45662.
What time zone is Portsmouth in?
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Portsmouth is in the Eastern Time zone (America/New York).
How far is Portsmouth from Columbus?
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Portsmouth is about 85 miles from Columbus, the capital of Ohio, in a straight line.
What cities are near Portsmouth?
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Cities near Portsmouth include Ashland, KY (26 miles); Huntington, WV (37 miles); Maysville, KY (41 miles); Chillicothe, OH (42 miles); Morehead, KY (45 miles).
Local notes for Portsmouth, OH
Questions and local knowledge from people who know the area. Every note is read before it appears here.