Population 8,674 · Census ACS 2020–24
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Population and households in Twain
Household size in Twain
| Period | Twain | Iowa City | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.28 | 2.25 | 2.44 | 2.68 |
| 2010–14 | 2.37 | 2.25 | 2.45 | 2.73 |
| 2015–19 | 2.42 | 2.26 | 2.43 | 2.71 |
| 2020–24 | 2.66 | 2.32 | 2.43 | 2.65 |
| Change | +0.39 | +0.08 | −0.01 | −0.03 |
At 2.66 people per household, Twain sits close to the national average of 2.65. The typical household here is bigger than in Iowa City as a whole, where it has 2.32 people. Household size has climbed from 2.28 in 2006–10, 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 Twain
| Period | Twain | Iowa City | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 30.7 | 31.7 | 38.8 | 37.7 |
| 2010–14 | 30.4 | 31.1 | 39.3 | 38.6 |
| 2015–19 | 32.0 | 32.6 | 39.7 | 39.6 |
| 2020–24 | 33.0 | 32.3 | 39.8 | 40.1 |
| Change | +2.3 | +0.6 | +1.0 | +2.3 |
With a median age of just 33.0, Twain is far younger than the country as a whole (40.1), a population that tilts toward young adults and children. Iowa City as a whole looks much the same. Since 2006–10, the median age has climbed from 30.7, as it has nationally.
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 Twain
| Period | Twain | Iowa City | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.7% | 6.5% | 9.5% | 12.3% |
| 2010–14 | 16.1% | 7.8% | 9.9% | 12.3% |
| 2015–19 | 10.5% | 6.2% | 10.0% | 11.6% |
| 2020–24 | 7.0% | 6.3% | 10.0% | 11.6% |
| Change | −3.6 pts | −0.2 pts | +0.6 pts | −0.6 pts |
Single parents head only 7.0% of households in Twain, well below the national share of 11.6%. Iowa City as a whole looks much the same. The single-parent share has fallen 3.6 points since 2006–10, a much bigger shift than nationally.
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 Twain
Renters in Twain
| Period | Twain | Iowa City | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 33.7% | 47.3% | 26.8% | 33.3% |
| 2010–14 | 37.8% | 48.2% | 28.2% | 35.6% |
| 2015–19 | 39.7% | 49.2% | 28.9% | 36.0% |
| 2020–24 | 38.9% | 49.1% | 28.3% | 34.8% |
| Change | +5.2 pts | +1.7 pts | +1.5 pts | +1.5 pts |
About four in ten households in Twain rent their homes (38.9%), a bit above the national share of 34.8%. Locally, though, renters make up a smaller share here than in Iowa City overall (49.1%). Among homeowners, 35.0% have no mortgage at all, below the national share of 39.8%. Since 2006–10, the renter share has risen 5.2 points, a much bigger shift than 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 Twain
| Period | Twain | Iowa City | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.7% | 7.8% | 8.7% | 11.4% |
| 2010–14 | 6.5% | 5.0% | 8.6% | 11.4% |
| 2015–19 | 8.0% | 8.5% | 9.4% | 11.1% |
| 2020–24 | 11.2% | 9.5% | 8.8% | 9.6% |
| Change | +2.4 pts | +1.7 pts | +0.1 pts | −1.8 pts |
Vacancy runs a little high in Twain: 11.2% of homes are empty, against 9.6% nationally. The count includes vacation homes and homes between owners or tenants, not just abandoned ones. Since 2006–10, vacancy has risen 2.4 points, even as the national rate fell.
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 Twain
| Period | Twain | Iowa City | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 1979 | 1976 | 1965 | 1974 |
| 2010–14 | 1978 | 1976 | 1967 | 1975 |
| 2015–19 | 1982 | 1981 | 1969 | 1977 |
| 2020–24 | 1988 | 1984 | 1971 | 1980 |
| Change | +9 | +8 | +6 | +6 |
Homes in Twain are newer than the national norm: the median home was built in 1988, versus 1980 across the U.S. The median year built has moved up from 1979 in 2006–10, a sign of steady new building. Newer construction is concentrated in the south, while the north has the oldest housing.
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 Twain
| Period | Twain | Iowa City | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | $745 | $771 | $669 | $965 |
| 2010–14 | $977 | $882 | $732 | $1,040 |
| 2015–19 | $964 | $980 | $821 | $1,213 |
| 2020–24 | $1,114 | $1,206 | $1,020 | $1,571 |
| Change | +$370 | +$434 | +$351 | +$606 |
The median renter in Twain pays $1,114 a month for rent and utilities, well below the national median of $1,571. Rent has climbed $370 a month since 2006–10, up 50%, a slower climb than the nation's. The typical renter here spends 27.9% of household income on rent, just under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Rents run highest in the north and lowest in the south.
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 Twain
Bachelor's degrees in Twain
| Period | Twain | Iowa City | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 35.2% | 56.2% | 26.5% | 28.4% |
| 2010–14 | 36.0% | 55.9% | 27.9% | 29.6% |
| 2015–19 | 35.3% | 55.8% | 29.3% | 32.1% |
| 2020–24 | 39.2% | 58.7% | 32.3% | 35.6% |
| Change | +3.9 pts | +2.5 pts | +5.8 pts | +7.2 pts |
About four in ten adults 25 and older in Twain (39.2%) have a bachelor's degree or higher, a bit above the national share of 35.6%. Even so, the share is lower than in Iowa City overall (58.7%). The share with a degree has risen 3.9 points since 2006–10, as it has nationally.
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 Twain
| Period | Twain | Iowa City | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 88.6% | 95.0% | 90.4% | 84.9% |
| 2010–14 | 89.5% | 94.4% | 91.4% | 86.1% |
| 2015–19 | 92.5% | 94.5% | 92.1% | 87.7% |
| 2020–24 | 93.0% | 95.3% | 93.0% | 89.3% |
| Change | +4.4 pts | +0.3 pts | +2.7 pts | +4.3 pts |
High school completion in Twain is above the national rate: 93.0% of adults have a diploma or equivalent, against 89.3%. Even so, the rate is lower than in Iowa City overall (95.3%). The share with a diploma is up 4.4 points from 2006–10, as it has 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 Twain
| Period | Twain | Iowa City | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.5% | 4.7% | 5.2% | 8.1% |
| 2010–14 | 4.2% | 4.4% | 5.4% | 9.4% |
| 2015–19 | 3.9% | 4.4% | 3.7% | 5.6% |
| 2020–24 | 7.7% | 5.1% | 3.7% | 5.4% |
| Change | +3.2 pts | +0.4 pts | −1.5 pts | −2.7 pts |
Unemployment in Twain runs well above the national rate: 7.7% of the labor force was out of work and looking, against 5.4%. Unemployment is up 3.2 points from 2006–10, even as the national rate fell. Because the Census pools five years of responses (2020–24), these rates smooth over short swings and lag the current 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).
Twain compared with nearby neighborhoods
| Neighborhood | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Twain | 2.66 | 33.0 | 7.0% | 38.9% | 11.2% | 1988 | $1,114 | 39.2% | 93.0% | 7.7% |
| Longfellow | 2.12 | 28.6 | 5.3% | 65.0% | 12.9% | 1983 | $1,189 | 60.5% | 96.3% | 3.8% |
| Lucas | 2.14 | 42.2 | 6.7% | 29.2% | 7.5% | 1987 | $1,321 | 48.1% | 95.5% | 6.9% |
| Roosevelt | 2.09 | 26.9 | 4.7% | 53.2% | 11.8% | 1977 | $1,167 | 72.8% | 95.2% | 5.2% |
| Mann | 2.03 | 24.7 | 5.6% | 68.5% | 9.0% | 1987 | $1,325 | 69.9% | 95.5% | 6.6% |
| Weber | 2.68 | 37.1 | 6.8% | 28.1% | 8.0% | 1999 | $1,368 | 63.6% | 93.6% | 1.6% |
| Kirkwood | 1.96 | 34.3 | 8.4% | 67.9% | 10.0% | 1992 | $1,164 | 49.9% | 94.4% | 2.8% |
| Wickham | 2.79 | 37.7 | 4.9% | 19.7% | 3.2% | 2001 | $1,162 | 72.6% | 98.5% | 1.0% |
| Penn | 2.78 | 34.5 | 8.4% | 27.4% | 7.3% | 2001 | $1,216 | 55.2% | 99.0% | 3.3% |
| Southwest Area | 3.21 | 35.9 | 8.8% | 32.7% | 12.0% | 1961 | $1,056 | 12.1% | 95.2% | 2.9% |
| Taylor | 2.28 | 35.8 | 22.8% | 41.7% | 10.5% | 1958 | $1,191 | 16.8% | 91.6% | 4.6% |
All figures 2020–24.
Neighborhoods with similar populations: Bagley Downs, Vancouver, WA · Collister, Boise, ID · Bel Air, Los Angeles, CA · Bemiss, Spokane, WA · Cochran's Crossing, The Woodlands, TX · Burnham Park, Milwaukee, WI · Cedar Hills, Cedar Rapids, IA · Central Berkeley, Berkeley, CA · South Coconut Grove, Miami, FL · Plaza Terrace, Tampa, FL
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 Twain. 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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