Longmont, CO Profile: Facts, Map & Data


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Longmont, Colorado - Basic Facts

The City of Longmont had a population of 95,734 as of July 1, 2017. Longmont ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Colorado. See peer rankings below.

The primary coordinate point for Longmont is located at latitude 40.1698 and longitude -105.099 in Boulder County. The formal boundaries for the City of Longmont (see map below) encompass a land area of 27.25 sq. miles and a water area of 1.47 sq. miles. Boulder County is in the Mountain time zone (GMT -7). The elevation is 4,984 feet.

While the primary coordinates for City of Longmont are located in Boulder County, it should be noted that the formal boundaries for this community also extend into and Weld County.

The City of Longmont (GNIS ID: 2410869) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Colorado is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of Longmont is located within Longmont Division of Boulder County.

Beneath the boundary map are tables with Longmont population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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City of Longmont, CO Boundary Map

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Longmont, CO Data & Demographics (As of July 1, 2017)


Total Population 95,734
Daytime Population: Workers 39,667
Daytime Population: Residents 47,296
Total Daytime Population (TDP) 86,963
Ratio TDP/Total Population1 0.91
Population in Households 94,982
Population in Familes 76,998
Population in Group Qrtrs 752
Population Density2 3,513
Diversity Index3 58


Median Household Income $65,842
Average Household Income $89,018
Per Capita Income $34,339


Total Housing Units 37,725 (100%)
Owner Occupied HU 22,065 (58.5%)
Renter Occupied HU 14,507 (38.5%)
Vacant Housing Units 1,153 ( 3.1%)
Median Home Value $311,373
Average Home Value $340,876


Total Households 36,572
Average Household Size 2.6
Family Households 24,215
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 1.47% 1.33%
Households 1.34% 1.26%
Families 1.31% 1.22%
Median Household Income   3.17%
Per Capita Income   2.79%

Longmont, CO - Peer Comparisons by Rank and Percentile

The table below compares Longmont to the other 458 incorporated cities, towns and CDPs in Colorado by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 14 97th
Population Density # 30 94th
Diversity Index # 117 75th
Median Household Income # 147 68th
Per Capita Income # 152 67th

Additional comparisons and rankings can be made with a VERY EASY TO USE Colorado Census Data Comparison Tool.

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