County Maps US

Montgomery County, Virginia

A county in Virginia, ranked 21 of 133 by population.

CountyFIPS 51121

Within Virginia
Montgomery County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Christiansburg, the county seat, located via the 2025 Census Gazetteer.

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Population
98,434
-1,159 (-1.2%) since 2020
Land area
386.8
square miles. A further 0.6% of the total area is water
Population density
254
people per square mile, computed rather than published
County seat
Christiansburg
Seat of county government.
Established
1772
253 years ago
Largest city
Blacksburg town
Population 45,104.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Montgomery County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Montgomery County, Virginia from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 729 by 800 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Montgomery County ranks

Position among the 133 counties and independent cities of Virginia, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn VirginiaNationally
Population98,43421st of 133634th of 3,144
Land area386.8 sq mi48th of 1332,580th of 3,144
Population density254 per sq mi50th of 133494th of 3,144
Median household income$72,71558th of 133999th of 3,143

Full data for Montgomery County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population98,434Vintage 2025 Population Estimates
Population in 202099,593Vintage 2025 Population Estimates
2020 estimates base?99,722Vintage 2025 Population Estimates
Land area386.8 sq mi2025 Gazetteer Files
Water area2.4 sq mi2025 Gazetteer Files
Total area389.3 sq mi2025 Gazetteer Files
Population density?254 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$72,715American Community Survey 2020-2024 5-Year Estimates
Median home value$304,600American Community Survey 2020-2024 5-Year Estimates
Median age30.2American Community Survey 2020-2024 5-Year Estimates
Households36,961American Community Survey 2020-2024 5-Year Estimates
Housing units42,794American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
-54
656 births, 710 deaths
Net migration
+126
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 6 areas bordering Montgomery County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Floyd CountyVirginia34 mi15,789
Pulaski CountyVirginia31 mi33,586
Roanoke CountyVirginia17 mi97,150
Radford cityVirginia14 mi17,243
Giles CountyVirginia11 mi16,564
Craig CountyVirginia11 mi4,800

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 133 counties and independent cities of Virginia

Open the interactive Virginia county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.