Population 432,998 · Census ACS 2020–24
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Population and households in Loudoun County
Household size in Loudoun County
| Period | Loudoun County | Washington area | Virginia | U.S. |
|---|---|---|---|---|
| 2006–10 | 3.13 | 2.73 | 2.63 | 2.68 |
| 2010–14 | 3.14 | 2.82 | 2.68 | 2.73 |
| 2015–19 | 3.12 | 2.86 | 2.68 | 2.71 |
| 2020–24 | 3.05 | 2.77 | 2.62 | 2.65 |
| Change | −0.07 | +0.04 | −0.01 | −0.03 |
Households in Loudoun County are large by national standards, averaging 3.05 people against 2.65 for the U.S. That usually means more families with children at home. Household size has edged down from 3.13 in 2006–10, in line with the national trend. Of Virginia's 133 counties, only four have larger households.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Loudoun County
| Period | Loudoun County | Washington area | Virginia | U.S. |
|---|---|---|---|---|
| 2006–10 | 35.0 | 37.0 | 38.2 | 37.7 |
| 2010–14 | 36.1 | 37.6 | 39.0 | 38.6 |
| 2015–19 | 37.3 | 38.5 | 40.0 | 39.6 |
| 2020–24 | 38.7 | 39.2 | 40.3 | 40.1 |
| Change | +3.7 | +2.2 | +2.1 | +2.3 |
Half of the people in Loudoun County are younger than 38.7 and half are older, close to the national median of 40.1. Since 2006–10, the median age has climbed from 35.0, mirroring the country.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Loudoun County
| Period | Loudoun County | Washington area | Virginia | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.7% | 11.3% | 11.1% | 12.3% |
| 2010–14 | 8.6% | 11.3% | 11.0% | 12.3% |
| 2015–19 | 7.4% | 10.4% | 10.5% | 11.6% |
| 2020–24 | 7.9% | 10.4% | 10.7% | 11.6% |
| Change | +0.2 pts | −0.9 pts | −0.4 pts | −0.6 pts |
Single parents head only 7.9% of households in Loudoun County, well below the national share of 11.6%. Compared with other Virginia counties, Loudoun County has a lower share of single-parent households than most.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Loudoun County
Renters in Loudoun County
| Period | Loudoun County | Washington area | Virginia | U.S. |
|---|---|---|---|---|
| 2006–10 | 19.2% | 34.0% | 31.1% | 33.3% |
| 2010–14 | 23.1% | 36.6% | 33.3% | 35.6% |
| 2015–19 | 21.9% | 36.8% | 33.7% | 36.0% |
| 2020–24 | 22.1% | 36.3% | 32.7% | 34.8% |
| Change | +2.9 pts | +2.3 pts | +1.5 pts | +1.5 pts |
Only 22.1% of households in Loudoun County rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Among owners, 19.8% have paid off their mortgages, well below the national share of 39.8%. Renting is most common in the east and least common in the southwest. Since 2006–10, the renter share has risen 2.9 points, as it has nationally.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Loudoun County
| Period | Loudoun County | Washington area | Virginia | U.S. |
|---|---|---|---|---|
| 2006–10 | 9.4% | 8.7% | 10.3% | 11.4% |
| 2010–14 | 5.8% | 7.3% | 10.2% | 11.4% |
| 2015–19 | 4.2% | 6.6% | 9.7% | 11.1% |
| 2020–24 | 3.8% | 5.9% | 8.7% | 9.6% |
| Change | −5.5 pts | −2.8 pts | −1.6 pts | −1.8 pts |
Only 3.8% of homes in Loudoun County are vacant, far below the national rate of 9.6%, which usually means strong demand for housing. Vacancy is down 5.5 points from 2006–10, a much bigger shift than nationally. Few Virginia counties have a lower vacancy rate: only two of 133.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Loudoun County
| Period | Loudoun County | Washington area | Virginia | U.S. |
|---|---|---|---|---|
| 2006–10 | 1996 | 1977 | 1978 | 1974 |
| 2010–14 | 1997 | 1978 | 1980 | 1975 |
| 2015–19 | 1998 | 1979 | 1981 | 1977 |
| 2020–24 | 2002 | 1982 | 1984 | 1980 |
| Change | +6 | +6 | +5 | +6 |
Much of the housing in Loudoun County is relatively new: half of its homes were built after 2002, compared with 1980 for the U.S. as a whole. The median year built has moved up from 1996 in 2006–10, a sign of steady new building. The newest homes are mostly in the southwest, the oldest in the northwest. Loudoun County has the newest homes of any Virginia county.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Loudoun County
| Period | Loudoun County | Washington area | Virginia | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,698 | $1,470 | $1,143 | $965 |
| 2010–14 | $1,750 | $1,583 | $1,238 | $1,040 |
| 2015–19 | $2,078 | $1,907 | $1,436 | $1,213 |
| 2020–24 | $2,605 | $2,236 | $1,743 | $1,571 |
| Change | +$907 | +$766 | +$600 | +$606 |
The median renter in Loudoun County pays $2,605 a month for rent and utilities, well above the national median of $1,571. Rents are up $907 a month from 2006–10, a 53% rise, a slower climb than the nation's. Rent takes 29.2% of the typical renter's income, just under the 30% mark often used to define affordable rent. No other Virginia county has higher rents.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Loudoun County
Bachelor's degrees in Loudoun County
| Period | Loudoun County | Washington area | Virginia | U.S. |
|---|---|---|---|---|
| 2006–10 | 58.9% | 46.6% | 35.2% | 28.4% |
| 2010–14 | 59.8% | 48.2% | 36.7% | 29.6% |
| 2015–19 | 62.6% | 51.0% | 39.3% | 32.1% |
| 2020–24 | 66.3% | 53.9% | 42.5% | 35.6% |
| Change | +7.5 pts | +7.3 pts | +7.3 pts | +7.2 pts |
College graduates are unusually common in Loudoun County: 66.3% of adults 25 and older have a bachelor's degree or higher, against 35.6% nationally. Education tends to track local incomes and the kinds of jobs nearby. Since 2006–10, the share with a degree has risen 7.5 points, in line with the national trend. Of Virginia's 133 counties, only two have a higher share of college graduates.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Loudoun County
| Period | Loudoun County | Washington area | Virginia | U.S. |
|---|---|---|---|---|
| 2006–10 | 94.1% | 89.4% | 86.8% | 84.9% |
| 2010–14 | 93.9% | 90.2% | 88.3% | 86.1% |
| 2015–19 | 94.2% | 90.8% | 89.9% | 87.7% |
| 2020–24 | 94.2% | 91.2% | 91.6% | 89.3% |
| Change | +0.1 pts | +1.7 pts | +4.7 pts | +4.3 pts |
High school completion in Loudoun County is above the national rate: 94.2% of adults have a diploma or equivalent, against 89.3%. Loudoun County has a higher share of high school graduates than the great majority of Virginia counties.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Loudoun County
| Period | Loudoun County | Washington area | Virginia | U.S. |
|---|---|---|---|---|
| 2006–10 | 3.7% | 5.9% | 6.0% | 8.1% |
| 2010–14 | 4.3% | 6.9% | 7.0% | 9.4% |
| 2015–19 | 3.2% | 4.7% | 4.7% | 5.6% |
| 2020–24 | 3.4% | 4.8% | 4.3% | 5.4% |
| Change | −0.2 pts | −1.1 pts | −1.7 pts | −2.7 pts |
Jobs have been easier to find in Loudoun County than nationally: unemployment was 3.4%, against 5.4%. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Loudoun County compared with nearby counties
| County | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Loudoun County | 3.05 | 38.7 | 7.9% | 22.1% | 3.8% | 2002 | $2,605 | 66.3% | 94.2% | 3.4% |
| Montgomery County | 2.85 | 41.4 | 9.8% | 34.7% | 5.0% | 1979 | $2,358 | 60.1% | 90.9% | 4.9% |
| Clarke County | 2.60 | 48.2 | 5.9% | 18.5% | 10.7% | 1981 | $1,307 | 40.1% | 92.9% | 2.5% |
| District of Columbia | 2.09 | 36.2 | 12.2% | 58.5% | 10.4% | 1963 | $2,078 | 63.4% | 92.7% | 7.0% |
| Prince George's County | 2.84 | 39.7 | 14.8% | 37.7% | 5.8% | 1979 | $2,013 | 36.8% | 86.1% | 6.4% |
| Warren County | 2.71 | 40.7 | 10.1% | 24.1% | 10.7% | 1985 | $1,260 | 25.1% | 88.9% | 4.7% |
| Winchester City | 2.39 | 38.5 | 13.7% | 56.4% | 10.3% | 1967 | $1,411 | 29.6% | 87.1% | 7.0% |
| Frederick County | 2.70 | 42.7 | 10.8% | 20.7% | 6.5% | 1996 | $1,700 | 32.6% | 90.1% | 4.0% |
| Anne Arundel County | 2.67 | 40.4 | 10.2% | 24.9% | 5.8% | 1983 | $2,121 | 45.8% | 93.6% | 3.8% |
| Hardy County | 2.43 | 47.4 | 8.5% | 22.7% | 27.0% | 1985 | $858 | 16.5% | 84.7% | 6.7% |
| Queen Anne's County | 2.60 | 44.4 | 8.7% | 17.1% | 9.6% | 1990 | $1,695 | 37.2% | 93.3% | 3.9% |
All figures 2020–24.
Counties with similar populations: Seminole County, FL · Hampden County, MA · Henrico County, VA · Hillsborough County, NH · Horry County, SC · Howard County, MD · Jefferson Parish, LA · Kane County, IL · Knox County, TN · Lake County, IN
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Loudoun County. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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