Onslow, IA population, income and ZIP codes

Onslow city is a very small community in Iowa, with 306 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #603 of 1,026 ranked by population — larger than 41% of them. The median age here is 28 years against 39.1 nationally, a distinctly younger profile, typical of places with students, military posts or a fast-growing family population. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.

Households in Onslow city earn a median of $42,813 a year, 45.5% below the national figure of $78,538 and 37% below the $67,791 median for the 290 Iowa cities we cover. Median household income counts every pre-tax dollar arriving at an address — wages, self-employment, Social Security, pensions, interest and public assistance — for everyone living there, so multi-earner households pull the figure up even where individual pay is modest. Poverty reaches 34.6% of residents here, well above the 12.4% national rate, which is the single clearest signal in this dataset that median income here is carried by a narrow band of households.

The typical owner-occupied home in Onslow city is valued at $96,500, 68.2% below the national figure and 38% below the $156,300 peer median, while median gross rent runs not published a month. The home-price-to-income ratio works out to 2.3×, against roughly 3.9× nationally, so purchase prices are unusually low against local pay, the pattern in places where supply is plentiful and wage growth has been flat. 82.5% of occupied homes are owner-occupied versus 65% nationally, an owner-dominated market where rental listings are scarce and rent medians rest on a thin sample. Gross rent folds in the utilities a tenant pays separately, so it is closer to the real monthly outlay than a headline rent figure.

A median age of 28 means a large student or early-career population; income medians in places like this understate household resources, since many residents are supported from outside the address. With 306 residents, a handful of survey responses moves every median on this page. Compare Onslow city against its county rather than against national figures.

The Census withheld gross rent for Onslow city because the sample was too thin to publish at this geography. Those values were suppressed at the source, not lost in our dataset, and we do not model a replacement. Everything else on this page comes straight from the ACS 2019-2023 ACS 5-year tables.