Data Last Updated: July 1, 2025

Larimer County, CO ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Larimer, CO.	33 ZIP Codes (17 General, 6 PO Box, 2 Unique, & 8 Multi County) [More Details]
Area Codes: The Telephone Area Codes that are associated with Larimer, CO. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	303, 720, 983, 970
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Mountain
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of Larimer, CO from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	359,066 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	08069
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	Fort Collins-Loveland, CO
Land Area: The approximate amount of land area covered by Larimer, CO in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	2,596 square miles
Water Area: The approximate amount of water area covered by Larimer, CO in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	38 square miles
Coordinates: The latitude/longitude centroid coordinates for Larimer County, CO.	-105.461139, 40.666396
Quick Link: Copy the direct link to the Larimer, COCounty page and use anywhere you like!	https://www.zip-codes.com/county/co-larimer.asp

Larimer, CO ZIP Code Boundaries

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Larimer County, CO Covers 33 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 80503 *	General	Longmont	35,863	--
ZIP Code 80504 *	General	Longmont	60,183	--
ZIP Code 80510	General	Allenspark	439	0.12%
ZIP Code 80511	P.O. Box	Estes Park	0	0.00%
ZIP Code 80512	General	Bellvue	2,056	0.57%
ZIP Code 80513	General	Berthoud	15,824	4.41%
ZIP Code 80515	General	Drake	845	0.24%
ZIP Code 80517	General	Estes Park	9,720	2.71%
ZIP Code 80521	General	Fort Collins	37,451	10.43%
ZIP Code 80522	P.O. Box	Fort Collins	0	0.00%
ZIP Code 80523	Unique	Fort Collins	0	0.00%
ZIP Code 80524	General	Fort Collins	39,030	10.87%
ZIP Code 80525	General	Fort Collins	55,901	15.57%
ZIP Code 80526	General	Fort Collins	45,624	12.71%
ZIP Code 80527	P.O. Box	Fort Collins	0	0.00%
ZIP Code 80528	General	Fort Collins	23,660	6.59%
ZIP Code 80532	P.O. Box	Glen Haven	214	0.06%
ZIP Code 80534 *	General	Johnstown	18,785	--
ZIP Code 80535	General	Laporte	2,543	0.71%
ZIP Code 80536	General	Livermore	2,023	0.56%
ZIP Code 80537	General	Loveland	43,603	12.14%
ZIP Code 80538	General	Loveland	49,084	13.67%
ZIP Code 80539	P.O. Box	Loveland	0	0.00%
ZIP Code 80540 *	General	Lyons	4,710	--
ZIP Code 80541	P.O. Box	Masonville	0	0.00%
ZIP Code 80545	General	Red Feather Lakes	1,051	0.29%
ZIP Code 80547	General	Timnath	6,536	1.82%
ZIP Code 80549	General	Wellington	13,530	3.77%
ZIP Code 80550 *	General	Windsor	38,909	--
ZIP Code 80553	Unique	Fort Collins	0	0.00%
ZIP Code 80612 *	General	Carr	669	--
ZIP Code 82063 *	General	Jelm	122	--
ZIP Code 82070 *	General	Laramie	20,308	--

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into Larimer, CO, but will mostly cover area in a different County. Not included in % of Population calculations.

Important Larimer, CO Information

Larimer County, CO Covers 33 ZIP Codes. This includes 17 General ZIP Codes, 6 PO Box ZIP Codes, and 2 Unique (reserved for Business and Volume Mail Receivers). There are also 8 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Larimer County.

The population for Larimer County is 359,066, according to the U.S. Census. Population Density is 138.32 persons per square mile. With 158,769 Housing Units, the Average Household Size is 2.41 persons. There are 144,360 Family Households with an Average Family Size of 2.92 persons. 5.12% of the population is without Health Insurance. The 64.13% Employment Rate is 4.33% above the national average of 59.8%.243,809 people aged 25+ have some educational achievement, with 51.74% (or 126,142 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

There are 4 area codes serving this area including303, 720, 983 and 970. Larimer is also located in the Mountain timezone and the current local time is shown above.

Larimer is part of the Fort Collins-Loveland, CO Core Based Statistical Area (CBSA). Its CBSA Code is 22660.It is classified as a metro area, which means the combined population is 50,000 or more (at its core).

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more (for a micro area) and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in Larimer, CO have 154,947 Residential mailboxes and 9,174 Business mailboxes.There are 11,468 businesses with a total of 131,294 employees. That is an average of 11.4 employees per business. Annual payroll for these businesses is $7,944,818,000. Other Demographics

Larimer County Demographic Profile

Population & People

Total Population

359,066

Income

Median Household Income

$91,364

Housing

Total Housing Units

158,769

Health

Without Healthcare Coverage

5.12%

Business & Economy

Total Businesses

11,468

Families

Total Households

144,360

Employment

Employment Rate

64.13%

Education

Bachelor's Degree or Higher

51.74%

Total Population: Total number of people from the 2020 U.S. Census for Larimer, CO. This reflects the exact count of this area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	359,066
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Larimer, CO. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	374,667
Total Households: Total number of Households from the 2020 U.S. Census for Larimer, CO. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	144,360
Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	158,769
Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.41
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.92

Other Larimer Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	154,947
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	9,174
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	294,215
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	44,405
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	23,081

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	11,468
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$1,902,672,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$7,944,818,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	131,294

Sum of all ZIP Codes assigned Larimer, CO as their primary County.

References

U.S. Postal Service [Last Updated: 7/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 7/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov