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Colorado (Denver, Boulder, Longmont ... the area's biggest city by population; 860: ... November 4, 1990: prior to October 18, 1980, the area code served Tijuana ...
Clickable map of Colorado area codes in blue (with bordering states). [1] The U.S. state of Colorado is served by five telephone area codes of the North American Numbering Plan (NANP). Area code 303 is the original area code assigned to the entire state when the first nationwide telephone numbering plan was created in 1947.
On July 21, 2023, the OMB delineated three combined statistical areas, seven metropolitan statistical areas, and ten micropolitan statistical areas in Colorado. [1] As of 2023, the most populous of these statistical areas is the Denver-Aurora-Greeley, CO CSA, comprising the area around Colorado's capital and largest city of Denver.
The 1990 United States census, conducted by the Census Bureau, determined the resident population of the United States to be 248,709,873, an increase of 9.8 percent over the 226,545,805 persons enumerated during the 1980 census.
This list also details municipal population changes since the 2000 United States census and includes a gallery of the 20 most populous Colorado municipalities. With a 2023 population estimate of 716,577 residents, the City and County of Denver remains the most populous municipality in Colorado as it has since its original incorporation on ...
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To find out the 25 poorest and richest area codes, GOBankingRates used the 2015 Census Community Survey, the most recent data available, to rank cities across the nation in order of mean household ...
[a] This list also details the county population changes since the 2000 United States Census. [3] El Paso County with a 2023 population estimate of 744,215 remains the most populous county in Colorado, while Hinsdale County with a 2023 population of 765 is now the least populous county. Five of the 64 Colorado counties have more than 500,000 ...