Longmont Flag

Longmont

County:
Boulder County
County Seat:
No
Area (mi²):
29.28
State:
Colorado

Longmont is a city located in Boulder County, Colorado. Longmont has a 2026 population of 100,124. Longmont is currently growing at a rate of 0.15% annually and its population has increased by 0.93% since the most recent census, which recorded a population of 99,206 in 2020.

The median household income in Longmont is $90,671 with a poverty rate of 8.6%. The median age in Longmont is 40.3 years: 38.8 years for males, and 42.5 years for females. For every 100 females there are 98.8 males.

100.1K
Total Population
3,419
Density (mi²)
153 0.15%
Growth

Longmont Population

Longmont Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026100,1241530.15%
202599,9711530.15%
202499,8187130.72%
202399,105990.1%
202299,006-735-0.74%
202199,7415350.54%
202099,2062870.29%
201997,3162,0652.17%
201895,2517190.76%
201794,5324780.51%
201694,0549641.04%
201593,0901,6421.8%
201491,4481,2031.33%
201390,2451,3011.46%
201288,9441,2841.46%
201187,6601,0441.21%
201086,6163460.4%
200071,09319,53837.9%
199051,5558,61320.06%
198042,94219,73385.02%
197023,20911,720102.01%
196011,4893,39041.86%
19508,0996939.36%
19407,4061,37722.84%
19306,0291813.1%
19205,8481,59237.41%
19104,2562,05693.45%
19002,20000%

Median Age

Overall: 40.3 years
Female: 42.5 years
Male: 38.8 years

Longmont Adults

There are 80,682 adults, (18,520 of whom are seniors) in Longmont.

Sex Ratio

Female: 50,014 (50.3%)
Male: 49,392 (49.7%)

Demographics

The racial composition of Longmont includes 72.2% White, 5.79% other race, 3.39% Asian, and smaller percentages for Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White71,77472.2%
Two or more races16,95817.06%
Other race5,7585.79%
Asian3,3713.39%
Black or African American8690.87%
Native American5800.58%
Native Hawaiian or Pacific Islander960.1%
Race
Population ↓
Percentage (of total)
Two or more races12,30012.37%
Other race5,5415.57%
White5,4965.53%
Native American3470.35%
Black or African American1100.11%
Asian540.05%
Race
Population ↓
Percentage (of total)
White66,27866.67%
Two or more races4,6584.69%
Asian3,3173.34%
Black or African American7590.76%
Native American2330.23%
Other race2170.22%
Native Hawaiian or Pacific Islander960.1%

Longmont Marital Status

Economics and Income Statistics

Longmont 's average per capita income is $56,356. Household income levels show a median of $90,671. The poverty rate stands at 8.6%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$133,509$159,297
Families$116,723$140,986
Households$90,671$115,584
Non Families$59,250$75,513

$56,356

Average Income

$90,671

Median Household Income

8.6%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)