Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — PREFIX/805

ZIP codes starting with 805

ZIP codes
42
States
CO
Largest city
Longmont, CO
Population
640,208

The first three digits of a ZIP code identify a sectional center facility — the postal processing plant that sorts mail for the area. It is a mail-routing grouping, not an administrative boundary.

Every ZIP code in 805xx

ZIP codes starting with 805
ZIP City Type Population Median income Median home
80501 Longmont , CO Standard 44,147 $80,911 $488,800
80502 Longmont , CO No street area — — —
80503 Longmont , CO Standard 35,846 $113,620 $755,500
80504 Longmont , CO Standard 63,451 $113,643 $591,700
80510 Allenspark , CO Standard 663 $101,250 $771,100
80511 Estes Park , CO No street area — — —
80512 Bellvue , CO Standard 1,903 $97,837 $625,000
80513 Berthoud , CO Standard 18,271 $126,726 $600,600
80514 Dacono , CO Standard 6,721 $104,494 $488,500
80515 Drake , CO Standard 934 $66,615 $544,900
80516 Erie , CO Standard 39,048 $168,725 $726,700
80517 Estes Park , CO Standard 9,657 $95,404 $701,700
80520 Firestone , CO Standard 1,140 $63,529 $449,400
80521 Fort Collins , CO Standard 38,776 $58,082 $564,900
80522 Fort Collins , CO No street area — — —
80523 Fort Collins , CO No street area — — —
80524 Fort Collins , CO Standard 40,030 $85,035 $561,400
80525 Fort Collins , CO Standard 54,211 $91,636 $588,400
80526 Fort Collins , CO Standard 44,326 $88,686 $551,800
80527 Fort Collins , CO No street area — — —
80528 Fort Collins , CO Standard 24,960 $130,350 $705,000
80530 Frederick , CO Standard 6,242 $124,000 $466,000
80532 Glen Haven , CO Standard 185 $53,295 $311,700
80533 Hygiene , CO No street area — — —
80534 Johnstown , CO Standard 20,502 $129,024 $553,300
80535 Laporte , CO Standard 1,896 $110,945 $483,300
80536 Livermore , CO Standard 2,383 $117,500 $630,800
80537 Loveland , CO Standard 44,425 $86,325 $484,300
80538 Loveland , CO Standard 50,110 $86,671 $497,700
80539 Loveland , CO No street area — — —
80540 Lyons , CO Standard 4,642 $139,521 $795,500
80541 Masonville , CO No street area — — —
80542 Mead , CO Standard 5,155 $133,500 $614,600
80543 Milliken , CO Standard 9,774 $104,574 $415,700
80544 Niwot , CO Standard 0 — —
80545 Red Feather Lakes , CO Standard 937 $93,207 $394,600
80546 Severance , CO Standard 271 $113,242 —
80547 Timnath , CO Standard 8,821 $180,492 $742,300
80549 Wellington , CO Standard 14,325 $107,614 $475,900
80550 Windsor , CO Standard 46,456 $126,132 $582,000
80551 Windsor , CO No street area — — —
80553 Fort Collins , CO No street area — — —

Cite this page

zipcodes.pro. “ZIP codes starting with 805.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/805

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