Population 12,511 · Census ACS 2020–24
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Population and households in Derby
Household size in Derby
| Period | Derby | New Haven area | Connecticut | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.48 | 2.55 | 2.57 | 2.68 |
| 2010–14 | 2.55 | 2.60 | 2.61 | 2.73 |
| 2015–19 | 2.35 | 2.55 | 2.57 | 2.71 |
| 2020–24 | 2.13 | 2.53 | 2.55 | 2.65 |
| Change | −0.35 | −0.02 | −0.02 | −0.03 |
Households in Derby are small: just 2.13 people on average, compared with 2.65 nationally. That is typical of places where many people live alone or as couples, and fewer have children at home. Since 2006–10, household size has dropped from 2.48, a much bigger shift than nationally. Only six of the 145 Connecticut cities with 5,000+ people have smaller 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 Derby
| Period | Derby | New Haven area | Connecticut | U.S. |
|---|---|---|---|---|
| 2006–10 | 41.2 | 39.4 | 40.0 | 37.7 |
| 2010–14 | 41.7 | 40.3 | 41.0 | 38.6 |
| 2015–19 | 41.8 | 41.4 | 42.0 | 39.6 |
| 2020–24 | 46.2 | 41.7 | 42.1 | 40.1 |
| Change | +5.0 | +2.3 | +2.1 | +2.3 |
With a median age of 46.2, Derby is noticeably older than the country as a whole (40.1), an age mix that tilts toward empty nesters and retirees. The median age has climbed from 41.2 in 2006–10, as it has nationally. The youngest areas are in the center, the oldest in the north.
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 Derby
| Period | Derby | New Haven area | Connecticut | U.S. |
|---|---|---|---|---|
| 2006–10 | 11.1% | 12.7% | 11.2% | 12.3% |
| 2010–14 | 12.2% | 12.4% | 11.6% | 12.3% |
| 2015–19 | 11.8% | 12.0% | 10.8% | 11.6% |
| 2020–24 | 13.1% | 13.5% | 11.4% | 11.6% |
| Change | +2.0 pts | +0.8 pts | +0.2 pts | −0.6 pts |
Single parents head just over one in eight households in Derby (13.1%), a bit above the national share of 11.6%. The single-parent share has risen 2.0 points since 2006–10, even as the national share fell. Derby has a higher share of single-parent households than the great majority of Connecticut cities.
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 Derby
Renters in Derby
| Period | Derby | New Haven area | Connecticut | U.S. |
|---|---|---|---|---|
| 2006–10 | 41.4% | 34.7% | 30.8% | 33.3% |
| 2010–14 | 41.7% | 36.8% | 32.7% | 35.6% |
| 2015–19 | 42.6% | 38.2% | 33.9% | 36.0% |
| 2020–24 | 38.1% | 37.6% | 33.5% | 34.8% |
| Change | −3.3 pts | +2.9 pts | +2.7 pts | +1.5 pts |
Nearly four in ten households in Derby rent their homes (38.1%), a bit above the national share of 34.8%. Among homeowners, 33.7% have no mortgage at all, below the national share of 39.8%. Rentals cluster in the center; owners are most common in the east. Since 2006–10, the renter share has fallen 3.3 points, even as the national share rose.
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 Derby
| Period | Derby | New Haven area | Connecticut | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.8% | 9.1% | 8.8% | 11.4% |
| 2010–14 | 11.4% | 10.6% | 9.5% | 11.4% |
| 2015–19 | 15.0% | 10.8% | 10.2% | 11.1% |
| 2020–24 | 7.4% | 8.0% | 7.9% | 9.6% |
| Change | −3.5 pts | −1.2 pts | −0.9 pts | −1.8 pts |
Fewer homes sit empty in Derby than nationally: 7.4%, against 9.6% for the U.S. The New Haven area as a whole looks much the same. Vacancy has fallen 3.5 points since 2006–10, in line with the national trend.
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 Derby
| Period | Derby | New Haven area | Connecticut | U.S. |
|---|---|---|---|---|
| 2006–10 | 1955 | 1961 | 1963 | 1974 |
| 2010–14 | 1957 | 1961 | 1964 | 1975 |
| 2015–19 | 1958 | 1961 | 1964 | 1977 |
| 2020–24 | 1964 | 1964 | 1967 | 1980 |
| Change | +9 | +3 | +4 | +6 |
The housing in Derby is old by national standards: the median home dates to 1964, against 1980 for the U.S., so buyers will find more older houses, some of them due for updates. The median year built has moved up from 1955 in 2006–10, a sign of steady new building. The newest homes are mostly in the east, 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 Derby
| Period | Derby | New Haven area | Connecticut | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,126 | $1,093 | $1,127 | $965 |
| 2010–14 | $1,186 | $1,175 | $1,218 | $1,040 |
| 2015–19 | $1,151 | $1,288 | $1,380 | $1,213 |
| 2020–24 | $1,487 | $1,584 | $1,702 | $1,571 |
| Change | +$361 | +$491 | +$575 | +$606 |
The median renter in Derby pays $1,487 a month for rent and utilities, below the national median of $1,571. Rents are up $361 a month from 2006–10, a 32% rise, a slower climb than the nation's. Rent takes 31.0% of the typical renter's income, just over the 30% mark often used to define affordable rent. The priciest rents are in the east; the most affordable are in the center.
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 Derby
Bachelor's degrees in Derby
| Period | Derby | New Haven area | Connecticut | U.S. |
|---|---|---|---|---|
| 2006–10 | 19.3% | 31.6% | 35.5% | 28.4% |
| 2010–14 | 27.1% | 33.1% | 37.0% | 29.6% |
| 2015–19 | 20.1% | 34.5% | 39.2% | 32.1% |
| 2020–24 | 35.1% | 38.5% | 42.3% | 35.6% |
| Change | +15.8 pts | +6.9 pts | +6.8 pts | +7.2 pts |
Just over a third of adults 25 and older in Derby (35.1%) hold at least a bachelor's degree, close to the national share of 35.6%. The share is lower than in the wider New Haven area (38.5%). Since 2006–10, the share with a degree has risen 15.8 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 Derby
| Period | Derby | New Haven area | Connecticut | U.S. |
|---|---|---|---|---|
| 2006–10 | 83.8% | 87.4% | 88.1% | 84.9% |
| 2010–14 | 87.7% | 88.4% | 89.2% | 86.1% |
| 2015–19 | 86.5% | 89.6% | 90.4% | 87.7% |
| 2020–24 | 88.7% | 90.6% | 91.2% | 89.3% |
| Change | +4.9 pts | +3.2 pts | +3.1 pts | +4.3 pts |
About as many adults in Derby have finished high school as nationally: 88.7%, against 89.3%. The rate is lower than in the wider New Haven area (90.6%). The share with a diploma is up 4.9 points from 2006–10, in line with the national trend.
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 Derby
| Period | Derby | New Haven area | Connecticut | U.S. |
|---|---|---|---|---|
| 2006–10 | 11.7% | 8.5% | 7.8% | 8.1% |
| 2010–14 | 11.2% | 10.7% | 9.7% | 9.4% |
| 2015–19 | 10.5% | 6.7% | 6.2% | 5.6% |
| 2020–24 | 6.1% | 6.4% | 5.6% | 5.4% |
| Change | −5.7 pts | −2.2 pts | −2.1 pts | −2.7 pts |
At 6.1%, unemployment in Derby is close to the national rate of 5.4%. Unemployment has fallen 5.7 points since 2006–10, in line with the national trend. 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).
Derby compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Derby | 2.13 | 46.2 | 13.1% | 38.1% | 7.4% | 1964 | $1,487 | 35.1% | 88.7% | 6.1% |
| Ansonia | 2.65 | 40.3 | 14.6% | 41.9% | 9.5% | 1950 | $1,545 | 21.1% | 89.9% | 9.9% |
| Shelton | 2.62 | 45.6 | 7.5% | 23.5% | 6.2% | 1976 | $1,802 | 42.6% | 93.1% | 4.8% |
| Woodbridge | 2.76 | 48.2 | 5.4% | 6.8% | 10.5% | 1967 | $1,803 | 71.1% | 96.4% | 6.5% |
| Orange | 2.70 | 46.5 | 6.1% | 10.8% | 4.4% | 1966 | $2,762 | 59.1% | 96.9% | 3.3% |
| Seymour | 2.73 | 43.5 | 12.8% | 25.7% | 4.1% | 1972 | $1,598 | 32.1% | 92.6% | 5.3% |
| Spring Glen | 2.72 | 49.0 | 4.2% | 12.6% | 11.5% | 1969 | $1,721 | 57.5% | 93.5% | 2.3% |
| West Haven | 2.59 | 38.0 | 13.5% | 49.5% | 5.9% | 1959 | $1,488 | 31.7% | 88.2% | 7.5% |
| Milford | 2.38 | 46.2 | 6.7% | 24.4% | 7.7% | 1965 | $2,066 | 50.5% | 96.5% | 4.6% |
| Monroe | 3.11 | 42.6 | 7.8% | 4.3% | 8.5% | 1977 | $1,538 | 57.3% | 97.1% | 4.2% |
| Oxford | 2.64 | 45.9 | 1.6% | 9.4% | 4.1% | 1988 | $1,389 | 46.9% | 97.5% | 2.4% |
All figures 2020–24.
Cities with similar populations: Mohnton, PA · Midland, WA · Midway City, CA · Milan, MI · Milan, TN · Miller Place, NY · Millersville, PA · Mitchellville, MD · Mogadore, OH · Middleville, MI
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 Derby. 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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