Westminster, CO: Population, ZIP Codes & Nearby Cities

Westminster, CO is an incorporated city located in Adams County in the state of Colorado. Our data estimates 113,166 residents, places it at 39.884°N, 105.062°W, and lists it in Mountain time. This page explains its population rank, ZIP codes, nearby cities and distance to big metros.

What are the key facts about Westminster, CO?

What is the population of Westminster, CO?

Westminster has an estimated population of 113,166. That makes it the 12th largest of the 448 places we list in Colorado, and the 3rd largest of 16 places in Adams County. The typical place in Colorado has about 914 residents, so Westminster is many dozens of times larger than a typical place in the state.

Estimates for places of this size carry wider margins of error than those for big cities, so treat the figure as a guide to scale. Our guide to understanding city population numbers explains why sources disagree.

Places in Colorado with a similar population include Boulder (124,345), Arvada (121,272), Centennial (110,937), Highlands Ranch (105,631), Longmont (102,474). Comparing these pages is a quick way to see how Westminster differs from communities of the same scale.

How dense is Westminster?

Westminster has about 3,582 people per square mile (1,383 per square kilometer), which we classify as suburban. Within Colorado, it is denser than about 94% of the listed places. Land at this level is usually a mix of single-family neighborhoods, shopping corridors and parks, where driving is common but destinations are close. Read how to interpret population density to see how we draw these lines.

What ZIP codes does Westminster use?

The postal data lists 8 ZIP codes for Westminster: 80030, 80031, 80234, 80005, 80003, 80021, 80020, 80035. A long list like this is typical of a large city, where dozens of delivery areas, PO box codes and institutional codes sit inside the same municipality. Codes beginning with 8 are assigned to the Mountain West (Arizona, Colorado, Idaho, Nevada, New Mexico, Utah and Wyoming). Learn more in our guide to how ZIP codes work or check any code with the ZIP code lookup.

What time zone is Westminster in?

Westminster is in the Mountain time zone, which is UTC−7 from Coordinated Universal Time in standard time (IANA zone America/Denver). The area observes daylight saving time, so clocks move forward in March and back in November. The nearest listed place in a different time zone is Colby, KS, about 216 miles away, which gives a sense of how far the nearest zone boundary may be. Current local time: see the Mountain time hub. For the rules behind these zones, read US time zones explained.

Where is Westminster located in Colorado?

Westminster lies in the northern part of Colorado, at 39.884° north latitude and 105.062° west longitude. The state capital, Denver, is about 13 miles to the southeast. The closest listed place in another state is Cheyenne, WY, roughly 88 miles to the north, which shows how near Westminster is to a state line. For big-city services, the nearest place with more than 100,000 people is Arvada, CO, 6 miles to the southwest.

Which cities are near Westminster, CO?

The closest listed place to Westminster is Shaw Heights, CO, 2.2 miles to the southeast. Of the eight nearest places below, 6 are in the same county. Distances are straight-line (great-circle) miles measured between place centers; see how distance is calculated.

Which county is Westminster in?

Westminster is in Adams County, which has the Federal Information Processing Standards (FIPS) code 08001. The county contains 16 places in our data, 13 of which have their own page here and 3 smaller communities that appear only in county and state lists. Other places in the county include Aurora (379,289), Thornton (141,464), Commerce City (60,336), Brighton (41,554), Northglenn (38,819). Codes like this one help separate places that share a name; see the guide to counties and FIPS codes.

How far is Westminster from major US cities?

Among six major hubs, Westminster is closest to Denver, CO at about 13 miles and farthest from New York, NY at about 1,633 miles in a straight line. Road distances are usually 10 to 30 percent longer. Try the distance calculator for any other pair.

Are there other places called Westminster?

Yes. Our data lists 6 other places named Westminster: Westminster, CA (90,643), Westminster, MD (18,640), Westminster, LA (2,760), Westminster, SC (2,591), Westminster, TX (956), Westminster, OH (492). When you search for Westminster, add the state or county so you land on the right one. This page covers the Westminster in Adams County, Colorado.

Where to go next

Population and density come from a compiled dataset and are estimates. They may differ from official Census Bureau counts. Verify important figures at census.gov.