Population 773 · Census ACS 2020–24
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Median age by neighborhoodHistory and comparison ↓︎
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Population and households in Castalia
Household size in Castalia
| Period | Castalia | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 2.45 | 2.44 | 2.68 |
| 2010–14 | 2.48 | 2.45 | 2.73 |
| 2015–19 | 2.35 | 2.43 | 2.71 |
| 2020–24 | 2.49 | 2.43 | 2.65 |
| Change | +0.04 | −0.01 | −0.03 |
The average household in Castalia has 2.49 people, a bit under the U.S. average of 2.65. The picture is much the same across Iowa.
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 Castalia
| Period | Castalia | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 45.1 | 38.8 | 37.7 |
| 2010–14 | 45.8 | 39.3 | 38.6 |
| 2015–19 | 46.3 | 39.7 | 39.6 |
| 2020–24 | 45.5 | 39.8 | 40.1 |
| Change | +0.3 | +1.0 | +2.3 |
Castalia skews older: half of its residents are older than 45.5, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families.
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 Castalia
| Period | Castalia | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 9.3% | 9.5% | 12.3% |
| 2010–14 | 5.8% | 9.9% | 12.3% |
| 2015–19 | 11.7% | 10.0% | 11.6% |
| 2020–24 | 4.8% | 10.0% | 11.6% |
| Change | −4.5 pts | +0.6 pts | −0.6 pts |
Single parents head only 4.8% of households in Castalia, well below the national share of 11.6%. The single-parent share has fallen 4.5 points since 2006–10, but in a place this small, much of that may be survey noise rather than real change.
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 Castalia
Renters in Castalia
| Period | Castalia | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 13.1% | 26.8% | 33.3% |
| 2010–14 | 14.3% | 28.2% | 35.6% |
| 2015–19 | 15.4% | 28.9% | 36.0% |
| 2020–24 | 11.3% | 28.3% | 34.8% |
| Change | −1.8 pts | +1.5 pts | +1.5 pts |
Only 11.3% of households in Castalia rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. About four in ten owners (39.0%) have paid off their mortgages, about the same as 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 Castalia
| Period | Castalia | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 11.4% | 8.7% | 11.4% |
| 2010–14 | 7.8% | 8.6% | 11.4% |
| 2015–19 | 6.2% | 9.4% | 11.1% |
| 2020–24 | 7.9% | 8.8% | 9.6% |
| Change | −3.5 pts | +0.1 pts | −1.8 pts |
Fewer homes sit empty in Castalia than nationally: 7.9%, against 9.6% for the U.S. Iowa as a whole looks much the same.
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 Castalia
| Period | Castalia | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 1940 | 1965 | 1974 |
| 2010–14 | 1938 | 1967 | 1975 |
| 2015–19 | 1940 | 1969 | 1977 |
| 2020–24 | 1942 | 1971 | 1980 |
| Change | +2 | +6 | +6 |
Castalia is a place of older homes: half were built before 1942, while the national median is 1980. That means established neighborhoods, and more houses that may need updating.
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 Castalia
| Period | Castalia | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | $794 | $669 | $965 |
| 2010–14 | $735 | $732 | $1,040 |
| 2015–19 | $635 | $821 | $1,213 |
| 2020–24 | $789 | $1,020 | $1,571 |
| Change | −$5 | +$351 | +$606 |
Rent in Castalia runs $789 a month at the median, utilities included, well below the U.S. median of $1,571. The typical renter here spends 25.5% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally.
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 Castalia
Bachelor's degrees in Castalia
| Period | Castalia | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 8.2% | 26.5% | 28.4% |
| 2010–14 | 16.1% | 27.9% | 29.6% |
| 2015–19 | 16.6% | 29.3% | 32.1% |
| 2020–24 | 14.3% | 32.3% | 35.6% |
| Change | +6.1 pts | +5.8 pts | +7.2 pts |
Fewer adults in Castalia have a four-year degree than in the country as a whole: 14.3%, against 35.6% 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 Castalia
| Period | Castalia | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 88.2% | 90.4% | 84.9% |
| 2010–14 | 88.6% | 91.4% | 86.1% |
| 2015–19 | 91.5% | 92.1% | 87.7% |
| 2020–24 | 94.3% | 93.0% | 89.3% |
| Change | +6.1 pts | +2.7 pts | +4.3 pts |
High school completion in Castalia is above the national rate: 94.3% of adults have a diploma, against 89.3%. That is in line with the rest of Iowa.
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 Castalia
| Period | Castalia | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 3.0% | 5.2% | 8.1% |
| 2010–14 | 2.7% | 5.4% | 9.4% |
| 2015–19 | 2.2% | 3.7% | 5.6% |
| 2020–24 | 1.1% | 3.7% | 5.4% |
| Change | −1.9 pts | −1.5 pts | −2.7 pts |
Unemployment in Castalia has been low: just 1.1% of the labor force was out of work and looking, well below the national rate of 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).
Castalia 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Castalia | 2.49 | 45.5 | 4.8% | 11.3% | 7.9% | 1942 | $789 | 14.3% | 94.3% | 1.1% |
| Postville | 2.97 | 29.7 | 10.3% | 31.4% | 2.9% | 1951 | $865 | 16.8% | 87.6% | 3.4% |
| Ossian | 2.50 | 43.8 | 8.7% | 16.5% | 11.0% | 1946 | $847 | 20.8% | 93.5% | 2.6% |
| Clermont | 2.23 | 50.6 | 4.0% | 9.1% | 11.8% | 1956 | $478 | 23.4% | 95.8% | 2.4% |
| Luana | 2.88 | 30.5 | 10.6% | 31.7% | 5.8% | 1956 | $836 | 17.1% | 88.8% | 3.6% |
| Nordness | 2.41 | 43.9 | 2.8% | 16.6% | 2.8% | 1939 | $612 | 22.8% | 95.7% | 0.9% |
| Ludlow | 2.40 | 48.4 | 3.8% | 12.3% | 9.4% | 1975 | $738 | 27.7% | 96.9% | 1.8% |
| Festina | 2.47 | 42.9 | 7.2% | 16.6% | 15.7% | 1952 | $1,066 | 23.4% | 95.5% | 0.8% |
| Elgin | 2.19 | 49.7 | 3.7% | 16.7% | 10.7% | 1962 | $564 | 22.7% | 95.8% | 1.9% |
| Calmar | 2.45 | 41.2 | 6.2% | 26.0% | 11.7% | 1962 | $896 | 24.1% | 97.5% | 0.5% |
| Gunder | 2.42 | 52.9 | 2.6% | 16.2% | 13.9% | 1941 | $902 | 9.4% | 98.2% | 1.2% |
All figures 2020–24.
Cities with similar populations: Danbury, IA · Raisin, CA · Rankin, IL · Ravencliff, WV · Rhodes, IA · Riggins, ID · Elm Hall, MI · Elberon, VA · Easton, WA · Easton, 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 Castalia. 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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