What is the population of Monmouth city?

Monmouth city has 8,794 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #247 of 1,462 in Illinois.

What is the median household income in Monmouth city?

Median household income in Monmouth city is $59,690 a year, 24% below the national figure of $78,538.

How much does it cost to rent or buy in Monmouth city?

Median gross rent is $652 a month and the median home value is $88,100, so rent absorbs about 13.1% of median household income.

Is Monmouth city affordable compared with the rest of the US?

Homes cost about 1.5× the local median income here versus roughly 3.9× nationally, so Monmouth city is more affordable to buy in than the typical US market, and rent takes 13.1% of median income against the 30% cost-burden line.

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Illinois · Census place 50010

Monmouth, IL population, income and ZIP codes

Quick answer

The population of the city of Monmouth, Illinois (Monmouth, IL — Census place “Monmouth city”) is 8,794 residents, ranking #247 of 1462 places in Illinois. Median household income is $59,690, the median home is worth $88,100 and median gross rent runs $652 a month. Looking for the Monmouth Illinois ZIP code list? 1 ZIP codes serve Monmouth, IL: 61462.

Population: 8,794Monmouth city residents
Median household income: $59,690Past 12 months, inflation adjusted
Median home value: $88,100Owner-occupied units
Median gross rent: $652Rent plus utilities, monthly
Median age: 35 yrsAll residents
Homeownership rate: 71.4%Owner-occupied households

Monmouth ZIP codes (Illinois)

Census ZCTAs whose delivery area overlaps Monmouth.

The Monmouth IL ZIP code list below covers 1 ZIP code. Open any one for its population, income, housing and rent profile.

61462

What the numbers mean in Monmouth city

Housing cost measured against local earnings.

A household earning the Monmouth city median would spend about 13.1% of gross income on the median rent. The 30% mark is the federal threshold for cost burden, so anything above it signals a stretched rental market. The median home costs 1.5× the median household income; nationally that ratio sits near 4.5×. Poverty affects 16.5% of residents and 71.4% of households own their home.

Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year

Monmouth city, IL in context

How this area compares with national benchmarks.

Monmouth city is a mid-size town in Illinois, with 8,794 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #247 of 1,462 ranked by population — larger than 83% of them. The median age here is 35 years against 39.1 nationally, a slightly younger profile than the country as a whole. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.

Households in Monmouth city earn a median of $59,690 a year, 24% below the national figure of $78,538 and 20% below the $74,244 median for the 698 Illinois cities we cover. The median is the midpoint household, not an average, so a handful of very high earners cannot drag it upward the way they distort a mean. Poverty reaches 16.5% of residents here, above the 12.4% national rate.

The typical owner-occupied home in Monmouth city is valued at $88,100, 71% below the national figure and 51% below the $179,100 peer median, while median gross rent runs $652 a month, 53.6% below the national figure, or roughly $7,824 across a full year. A household on the local median income would put about 13.1% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is cheap relative to what people here earn. The home-price-to-income ratio works out to 1.5×, 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. 71.4% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Rent is reported gross — contract rent plus tenant-paid utilities — which is why it runs above the advertised price on a listing for the same unit.

All values below were released by the Census for this exact geography, with no gap-filling on our side. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.

Compare with nearby places

Places of similar size in Illinois.

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Frequently asked questions

Common questions about this area.

What is the population of Monmouth city?: Monmouth city has 8,794 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #247 of 1,462 in Illinois.
What is the median household income in Monmouth city?: Median household income in Monmouth city is $59,690 a year, 24% below the national figure of $78,538.
How much does it cost to rent or buy in Monmouth city?: Median gross rent is $652 a month and the median home value is $88,100, so rent absorbs about 13.1% of median household income.
Is Monmouth city affordable compared with the rest of the US?: Homes cost about 1.5× the local median income here versus roughly 3.9× nationally, so Monmouth city is more affordable to buy in than the typical US market, and rent takes 13.1% of median income against the 30% cost-burden line.
How current is this Monmouth city data?: All figures come from the US Census Bureau American Community Survey 2019-2023 ACS 5-year five-year estimates. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.