What is the population of Longmont city?

Longmont city has 98,958 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #14 of 482 in Colorado.

What is the median household income in Longmont city?

Median household income in Longmont city is $89,724 a year, 14.2% above the national figure of $78,538.

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

Median gross rent is $1,755 a month and the median home value is $541,400, so rent absorbs about 23.5% of median household income.

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

Homes cost about 6× the local median income here versus roughly 3.9× nationally, so Longmont city is less affordable to buy in than the typical US market, and rent takes 23.5% of median income against the 30% cost-burden line.

Aerial view of a dense city center, illustrating the US cities ZIP code directory

Colorado · Census place 45970

Longmont, CO population, income and ZIP codes

Quick answer

The population of the city of Longmont, Colorado (Longmont, CO — Census place “Longmont city”) is 98,958 residents, ranking #14 of 482 places in Colorado. Median household income is $89,724, the median home is worth $541,400 and median gross rent runs $1,755 a month. Looking for the Longmont Colorado ZIP code list? 2 ZIP codes serve Longmont, CO: 80501, 80504.

Population: 98,958Longmont city residents
Median household income: $89,724Past 12 months, inflation adjusted
Median home value: $541,400Owner-occupied units
Median gross rent: $1,755Rent plus utilities, monthly
Median age: 40.1 yrsAll residents
Homeownership rate: 62.6%Owner-occupied households

Longmont ZIP codes (Colorado)

Census ZCTAs whose delivery area overlaps Longmont.

The Longmont CO ZIP code list below covers 2 ZIP codes. Open any one for its population, income, housing and rent profile.

What the numbers mean in Longmont city

Housing cost measured against local earnings.

A household earning the Longmont city median would spend about 23.5% 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 6.0× the median household income; nationally that ratio sits near 4.5×. Poverty affects 8.6% of residents and 62.6% of households own their home.

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

Longmont city, CO in context

How this area compares with national benchmarks.

Longmont city is a small city in Colorado, with 98,958 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #14 of 482 ranked by population — larger than 97% of them. The median age here is 40.1 years against 39.1 nationally, a slightly older profile than the country as a whole. At this size the Census also publishes one-year estimates; the five-year values used here are steadier and let you compare against smaller neighbours on the same basis.

Households in Longmont city earn a median of $89,724 a year, 14.2% above the national figure of $78,538 and 4% above the $86,484 median for the 223 Colorado 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 8.6% of residents here, below the 12.4% national rate.

The typical owner-occupied home in Longmont city is valued at $541,400, 78.4% above the national figure and 19% above the $453,600 peer median, while median gross rent runs $1,755 a month, 24.8% above the national figure, or roughly $21,060 across a full year. A household on the local median income would put about 23.5% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. The home-price-to-income ratio works out to 6×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 62.6% of occupied homes are owner-occupied versus 65% nationally, so the market leans more heavily on renters. Gross rent folds in the utilities a tenant pays separately, so it is closer to the real monthly outlay than a headline rent figure.

No figure on this page is estimated by us; each one comes straight from the published ACS tables for this area. 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 Colorado.

More Colorado coverage.

Frequently asked questions

Common questions about this area.

What is the population of Longmont city?: Longmont city has 98,958 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #14 of 482 in Colorado.
What is the median household income in Longmont city?: Median household income in Longmont city is $89,724 a year, 14.2% above the national figure of $78,538.
How much does it cost to rent or buy in Longmont city?: Median gross rent is $1,755 a month and the median home value is $541,400, so rent absorbs about 23.5% of median household income.
Is Longmont city affordable compared with the rest of the US?: Homes cost about 6× the local median income here versus roughly 3.9× nationally, so Longmont city is less affordable to buy in than the typical US market, and rent takes 23.5% of median income against the 30% cost-burden line.
How current is this Longmont city data?: All figures come from the US Census Bureau American Community Survey 2019-2023 ACS 5-year five-year estimates. At this size the Census also publishes one-year estimates; the five-year values used here are steadier and let you compare against smaller neighbours on the same basis.