Population 659,844 · Census ACS 2020–24
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Population and households in Arapahoe County
Household size in Arapahoe County
| Period | Arapahoe County | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.60 | 2.58 | 2.57 | 2.68 |
| 2010–14 | 2.69 | 2.66 | 2.63 | 2.73 |
| 2015–19 | 2.75 | 2.68 | 2.64 | 2.71 |
| 2020–24 | 2.66 | 2.57 | 2.54 | 2.65 |
| Change | +0.07 | −0.01 | −0.04 | −0.03 |
Households in Arapahoe County average 2.66 people, about the same as the country as a whole (2.65). The typical household here is bigger than in the Denver area as a whole, where it has 2.57 people. Since 2006–10, household size has crept up from 2.60, even as the national average fell.
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 Arapahoe County
| Period | Arapahoe County | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 37.0 | 36.7 | 36.9 | 37.7 |
| 2010–14 | 37.5 | 37.3 | 37.7 | 38.6 |
| 2015–19 | 38.2 | 38.0 | 38.5 | 39.6 |
| 2020–24 | 38.8 | 38.5 | 39.1 | 40.1 |
| Change | +1.8 | +1.8 | +2.1 | +2.3 |
Half of the people in Arapahoe County are younger than 38.8 and half are older, close to the national median of 40.1. Since 2006–10, the median age has climbed from 37.0, in line with the national trend. The youngest areas are in the north, the oldest in the southwest.
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 Arapahoe County
| Period | Arapahoe County | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 12.0% | 10.8% | 10.5% | 12.3% |
| 2010–14 | 11.8% | 11.0% | 10.8% | 12.3% |
| 2015–19 | 10.8% | 9.8% | 9.5% | 11.6% |
| 2020–24 | 10.8% | 9.6% | 9.3% | 11.6% |
| Change | −1.1 pts | −1.2 pts | −1.1 pts | −0.6 pts |
Single-parent households are about as common in Arapahoe County as they are nationally: 10.8%, against 11.6%. Single parents are more common here than in the Denver area as a whole (9.6%). Since 2006–10, the single-parent share has edged down 1.1 points, in line with the national trend.
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 Arapahoe County
Renters in Arapahoe County
| Period | Arapahoe County | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 34.1% | 33.5% | 32.4% | 33.3% |
| 2010–14 | 37.6% | 36.4% | 35.2% | 35.6% |
| 2015–19 | 36.5% | 36.1% | 34.8% | 36.0% |
| 2020–24 | 35.3% | 35.9% | 33.8% | 34.8% |
| Change | +1.2 pts | +2.4 pts | +1.4 pts | +1.5 pts |
Just over a third of households in Arapahoe County rent their homes (35.3%), close to the national share of 34.8%. Among homeowners, 26.7% have no mortgage at all, well below the national share of 39.8%. Rentals cluster in the north; owners are most common in the southeast. The renter share is up 1.2 points from 2006–10, in line with the national trend.
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 Arapahoe County
| Period | Arapahoe County | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.0% | 8.5% | 10.3% | 11.4% |
| 2010–14 | 6.1% | 6.6% | 8.7% | 11.4% |
| 2015–19 | 5.1% | 5.5% | 8.0% | 11.1% |
| 2020–24 | 5.6% | 6.0% | 7.3% | 9.6% |
| Change | −2.4 pts | −2.5 pts | −3.0 pts | −1.8 pts |
Only 5.6% of homes in Arapahoe County are vacant, far below the national rate of 9.6%, which usually means strong demand for housing. Since 2006–10, vacancy has fallen 2.4 points, as it has nationally. Of Colorado's 64 counties, only five have a lower vacancy rate.
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 Arapahoe County
| Period | Arapahoe County | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 1983 | 1980 | 1981 | 1974 |
| 2010–14 | 1984 | 1981 | 1982 | 1975 |
| 2015–19 | 1985 | 1982 | 1983 | 1977 |
| 2020–24 | 1988 | 1987 | 1988 | 1980 |
| Change | +5 | +8 | +7 | +6 |
Arapahoe County has newer housing than the country as a whole: the median home was built in 1988, versus 1980 nationally. The median year built has moved up from 1983 in 2006–10, a sign of steady new building. The newest homes are mostly in the southeast, the oldest in the west.
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 Arapahoe County
| Period | Arapahoe County | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,153 | $1,128 | $1,051 | $965 |
| 2010–14 | $1,253 | $1,245 | $1,165 | $1,040 |
| 2015–19 | $1,652 | $1,606 | $1,450 | $1,213 |
| 2020–24 | $2,201 | $2,181 | $1,963 | $1,571 |
| Change | +$1,048 | +$1,053 | +$912 | +$606 |
Rent in Arapahoe County runs $2,201 a month at the median, utilities included, well above the U.S. median of $1,571. Rents are up $1,048 a month from 2006–10, a 91% jump, faster than rents rose nationally. Rent takes 33.7% of the typical renter's income, well over the 30% mark often used to define affordable rent, so many renters here are stretched. Renters on a budget will find the lowest rents in the west; the highest are in the east.
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 Arapahoe County
Bachelor's degrees in Arapahoe County
| Period | Arapahoe County | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 38.2% | 38.1% | 36.4% | 28.4% |
| 2010–14 | 39.3% | 40.0% | 37.8% | 29.6% |
| 2015–19 | 42.4% | 43.5% | 40.9% | 32.1% |
| 2020–24 | 46.1% | 49.1% | 45.9% | 35.6% |
| Change | +7.8 pts | +11.0 pts | +9.4 pts | +7.2 pts |
College graduates are unusually common in Arapahoe County: 46.1% 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. Locally, though, the share is lower than in the Denver area overall (49.1%). Since 2006–10, the share with a degree has risen 7.8 points, mirroring the country.
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 Arapahoe County
| Period | Arapahoe County | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 90.8% | 88.8% | 89.5% | 84.9% |
| 2010–14 | 91.7% | 89.8% | 90.5% | 86.1% |
| 2015–19 | 92.5% | 91.1% | 91.8% | 87.7% |
| 2020–24 | 91.5% | 92.1% | 92.8% | 89.3% |
| Change | +0.8 pts | +3.3 pts | +3.3 pts | +4.3 pts |
High school completion in Arapahoe County is a bit above the national rate: 91.5% of adults have a diploma or equivalent, against 89.3%. That is in line with the rest of the Denver area. The share with a diploma has edged up 0.8 points since 2006–10, a smaller shift than nationally.
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 Arapahoe County
| Period | Arapahoe County | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 6.6% | 6.8% | 6.8% | 8.1% |
| 2010–14 | 8.0% | 7.5% | 7.9% | 9.4% |
| 2015–19 | 4.0% | 3.7% | 4.4% | 5.6% |
| 2020–24 | 4.9% | 4.4% | 4.6% | 5.4% |
| Change | −1.6 pts | −2.4 pts | −2.3 pts | −2.7 pts |
At 4.9%, unemployment in Arapahoe County is close to the national rate of 5.4%. Since 2006–10, unemployment has fallen 1.6 points, mirroring the country. 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).
Arapahoe 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Arapahoe County | 2.66 | 38.8 | 10.8% | 35.3% | 5.6% | 1988 | $2,201 | 46.1% | 91.5% | 4.9% |
| Denver County | 2.24 | 36.4 | 9.5% | 51.2% | 7.5% | 1979 | $2,029 | 55.9% | 91.0% | 4.9% |
| Jefferson County | 2.43 | 41.3 | 7.8% | 29.3% | 5.8% | 1982 | $2,135 | 52.4% | 95.8% | 3.9% |
| Clear Creek County | 1.99 | 49.2 | 5.2% | 18.4% | 15.1% | 1970 | $1,601 | 57.7% | 93.3% | 5.0% |
| Summit County | 2.59 | 41.7 | 6.9% | 27.9% | 48.3% | 1989 | $2,266 | 54.7% | 96.0% | 4.2% |
| Eagle County | 2.64 | 39.7 | 9.0% | 34.1% | 20.4% | 1995 | $2,051 | 50.5% | 94.9% | 4.2% |
| Garfield County | 2.66 | 38.2 | 9.0% | 30.4% | 7.2% | 1991 | $1,712 | 32.0% | 88.8% | 3.5% |
| Cheyenne County | 2.18 | 46.1 | 6.2% | 22.1% | 16.8% | 1951 | $664 | 22.2% | 88.7% | 2.4% |
| Phillips County | 2.11 | 46.4 | 9.7% | 22.0% | 18.2% | 1959 | $704 | 22.7% | 94.0% | 3.6% |
| Carbon County | 2.48 | 39.2 | 8.4% | 32.1% | 15.3% | 1966 | $884 | 19.1% | 92.5% | 6.5% |
| Smith County | 2.23 | 48.6 | 4.3% | 15.2% | 20.7% | 1950 | $631 | 25.5% | 95.6% | 0.7% |
All figures 2020–24.
Counties with similar populations: Bernalillo County, NM · Norfolk County, MA · Utah County, UT · Monmouth County, NJ · Brevard County, FL · Bucks County, PA · Jefferson County, AL · Providence County, RI · New Castle County, DE · Dane County, WI
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 Arapahoe 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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