Population 411 · Census ACS 2020–24
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Median age by neighborhoodHistory and comparison ↓︎
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Population and households in Neptune
Household size in Neptune
| Period | Neptune | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 2.69 | 2.44 | 2.68 |
| 2010–14 | 2.65 | 2.45 | 2.73 |
| 2015–19 | 2.56 | 2.43 | 2.71 |
| 2020–24 | 2.58 | 2.43 | 2.65 |
| Change | −0.11 | −0.01 | −0.03 |
At 2.58 people per household, Neptune sits close to the national average of 2.65. The typical household here is bigger than in Iowa overall, where it has 2.43 people. Since 2006–10, household size has dropped from 2.69, but in a place this small, much of that may be survey noise rather than real change.
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 Neptune
| Period | Neptune | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 42.5 | 38.8 | 37.7 |
| 2010–14 | 43.5 | 39.3 | 38.6 |
| 2015–19 | 41.6 | 39.7 | 39.6 |
| 2020–24 | 46.8 | 39.8 | 40.1 |
| Change | +4.3 | +1.0 | +2.3 |
Neptune skews older: half of its residents are older than 46.8, 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 Neptune
| Period | Neptune | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 3.4% | 9.5% | 12.3% |
| 2010–14 | 12.0% | 9.9% | 12.3% |
| 2015–19 | 7.8% | 10.0% | 11.6% |
| 2020–24 | 5.4% | 10.0% | 11.6% |
| Change | +2.0 pts | +0.6 pts | −0.6 pts |
Single-parent households are relatively rare in Neptune: 5.4% of households, against 11.6% 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 Neptune
Renters in Neptune
| Period | Neptune | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 12.3% | 26.8% | 33.3% |
| 2010–14 | 13.7% | 28.2% | 35.6% |
| 2015–19 | 15.4% | 28.9% | 36.0% |
| 2020–24 | 16.4% | 28.3% | 34.8% |
| Change | +4.1 pts | +1.5 pts | +1.5 pts |
Only 16.4% of households in Neptune rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. More than four in ten owners (44.9%) have paid off their mortgages, above the national share of 39.8%.
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 Neptune
| Period | Neptune | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 7.2% | 8.7% | 11.4% |
| 2010–14 | 1.8% | 8.6% | 11.4% |
| 2015–19 | 4.4% | 9.4% | 11.1% |
| 2020–24 | 4.3% | 8.8% | 9.6% |
| Change | −2.9 pts | +0.1 pts | −1.8 pts |
Only 4.3% of homes in Neptune are vacant, far below the national rate of 9.6%, which usually means strong demand for housing.
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 Neptune
| Period | Neptune | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 1968 | 1965 | 1974 |
| 2010–14 | 1969 | 1967 | 1975 |
| 2015–19 | 1970 | 1969 | 1977 |
| 2020–24 | 1978 | 1971 | 1980 |
| Change | +9 | +6 | +6 |
Homes in Neptune are about the same age as the nation's housing: the median home was built in 1978, versus 1980 nationally. Homes here are newer than in Iowa overall, where the median home dates to 1971.
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 Neptune
| Period | Neptune | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | $568 | $669 | $965 |
| 2010–14 | $759 | $732 | $1,040 |
| 2015–19 | $741 | $821 | $1,213 |
| 2020–24 | $889 | $1,020 | $1,571 |
| Change | +$321 | +$351 | +$606 |
Rent in Neptune runs $889 a month at the median, utilities included, well below the U.S. median of $1,571. Rent takes 21.1% of the typical renter's income, comfortably under the 30% mark often used to define affordable rent.
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 Neptune
Bachelor's degrees in Neptune
| Period | Neptune | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 21.7% | 26.5% | 28.4% |
| 2010–14 | 24.6% | 27.9% | 29.6% |
| 2015–19 | 23.6% | 29.3% | 32.1% |
| 2020–24 | 23.1% | 32.3% | 35.6% |
| Change | +1.4 pts | +5.8 pts | +7.2 pts |
College degrees are relatively uncommon in Neptune: 23.1% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%.
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 Neptune
| Period | Neptune | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 93.9% | 90.4% | 84.9% |
| 2010–14 | 95.8% | 91.4% | 86.1% |
| 2015–19 | 96.3% | 92.1% | 87.7% |
| 2020–24 | 95.7% | 93.0% | 89.3% |
| Change | +1.8 pts | +2.7 pts | +4.3 pts |
High school completion is high in Neptune: 95.7% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%.
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 Neptune
| Period | Neptune | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 2.5% | 5.2% | 8.1% |
| 2010–14 | 2.4% | 5.4% | 9.4% |
| 2015–19 | 1.9% | 3.7% | 5.6% |
| 2020–24 | 1.7% | 3.7% | 5.4% |
| Change | −0.8 pts | −1.5 pts | −2.7 pts |
The job market in Neptune has been strong: just 1.7% of the labor force was out of work and looking, well below the national rate of 5.4%. 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).
Neptune 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Neptune | 2.58 | 46.8 | 5.4% | 16.4% | 4.3% | 1978 | $889 | 23.1% | 95.7% | 1.7% |
| Hinton | 2.59 | 47.9 | 5.0% | 15.0% | 2.8% | 1988 | $976 | 24.4% | 96.2% | 0.9% |
| Merrill | 2.61 | 42.2 | 7.9% | 14.6% | 13.0% | 1958 | $721 | 16.6% | 94.4% | 2.0% |
| Lawton | 2.46 | 45.0 | 3.1% | 13.4% | 4.0% | 1975 | $953 | 34.5% | 97.7% | 2.2% |
| Sioux City | 2.65 | 36.2 | 16.1% | 34.1% | 8.1% | 1959 | $1,071 | 22.6% | 85.9% | 4.2% |
| Union Center | 3.00 | 41.1 | 10.2% | 5.6% | 9.9% | 1954 | $761 | 12.2% | 94.8% | 4.5% |
| West Le Mars | 2.33 | 37.7 | 3.9% | 34.6% | 6.9% | 1975 | $961 | 15.8% | 93.4% | 0.7% |
| Moville | 2.63 | 39.5 | 4.1% | 17.0% | 5.5% | 1968 | $680 | 34.5% | 96.3% | 2.4% |
| Kingsley | 2.46 | 43.2 | 3.5% | 17.0% | 6.8% | 1963 | $802 | 27.0% | 95.0% | 1.5% |
| Millnerville | 2.51 | 49.5 | 1.5% | 14.8% | 3.1% | 1979 | $646 | 20.0% | 93.8% | 0.3% |
| Le Mars | 2.42 | 38.9 | 11.3% | 37.4% | 5.7% | 1974 | $952 | 21.4% | 94.2% | 2.7% |
All figures 2020–24.
Cities with similar populations: Eris, OH · Filley, MO · Fidelity, IL · Felch, MI · Fame, MS · Falmouth, IL · Fair Oaks, TX · Eunice, KY · Essex, OH · Filley, NE
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 Neptune. 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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