When was Eagle County founded?

Eagle County was founded in 1883, formed from Summit County, and named after Eagle River, Colorado.

What is the county seat of Eagle County?

The county seat of Eagle County is Eagle.

Is there an online parcel map for Eagle County?

Yes. Eagle County publishes a parcel map of 25,124 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Eagle County's boundary or name changed?

Eagle County was created in 1883 from Summit County. The Atlas of Historical County Boundaries records no boundary change since.

Who issues building permits in Eagle County?

The county's page on building permits: Online Permit Portal. Inside a city or town, ask that city first.

Who issues septic and well permits in Eagle County?

The county's page on septic systems and wells: Avoid Bare Hand Contact.

Is my lot in a flood zone?

We do not have flood maps for Eagle County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

County · code 08037

Eagle CountyColorado

Eagle County is a county in Colorado with its seat in Eagle. It was formed on February 11, 1883, from Summit County and named after Eagle River.

Founded1883
County seatEagle
Named forEagle River, Colorado
Land area1,684 sq mi + 7.3 sq mi water
Population55,731 2020 Census
Parcels mapped25,124 checked 15 October 2026

Open the free map Click any parcel in Eagle County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated 19 October 2026

Census outline · seat marked

History

Formed in 1883 from Summit County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Eagle County was created from Summit County on February 11, 1883.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

1883
Eagle County created Eagle created from Summit.
from Summit
11 February 1883 · Colo. Laws 1883, 4th sess., pp. 127-130

Land and parcels

What the maps cover in Eagle

Who publishes each layer, how good it is, and when we last checked.

Parcels Good enough

Lot lines and tax-map numbers for 25,124 parcels from Eagle County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 15 October 2026
Address points Missing

No public address points layer found for Eagle County yet.
Buildings Reference

Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026

Official: from the office that keeps the record
Good enough: a reliable statewide or national copy
Fallback: a guide only; check the official record
Missing: nothing public found yet

People and land

Eagle by the Census

Population

55,731 2020 Census count

Housing units

32,967 2020 Census count

Land area

1,684 square miles

Water area

7.3 square miles

People per sq mi

33 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Who to ask before you build, dig or sell

Official county pages only. We link to them; we do not copy them, because they change.

Inside a city or town, permits usually come from that city rather than the county.

Records

Assessor and property records 970-328-8640from eaglecounty.us · checked 13 October 2026
Clerk of court: deeds and plats
Contact Commissioners
from eaglecounty.us · checked 13 October 2026

Permits

Health department: septic and well 970-328-8755from eaglecounty.us · checked 13 October 2026
Online Permit Portalfrom css.eaglecounty.us
Online Permit Portal for Community Developmentfrom css.eaglecounty.us
Environmental Protection Agency: Septic Systemsfrom epa.gov
Free PFAS Testing & Free Private Well Water Assessmentfrom cdphe.colorado.gov

Zoning and code

Planning and zoningfrom eaglecounty.us · checked 13 October 2026
Search Ordinancesfrom publiclaserfiche.eaglecounty.us
Ordinancesfrom eaglecounty.us
Planning & Zoningfrom eaglecounty.us

GIS and maps

County GIS and maps 970-328-8789from eaglecounty.us · checked 13 October 2026

County government

County government
The official website of Eagle County.
eaglecounty.us

See your own lot on these maps

Open Eagle County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

Open the free map no sign-in Pro early access

Questions

Common questions about Eagle County

When was Eagle County founded?: Eagle County was founded in 1883, formed from Summit County, and named after Eagle River, Colorado.
What is the county seat of Eagle County?: The county seat of Eagle County is Eagle.
Is there an online parcel map for Eagle County?: Yes. Eagle County publishes a parcel map of 25,124 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Eagle County's boundary or name changed?: Eagle County was created in 1883 from Summit County. The Atlas of Historical County Boundaries records no boundary change since.
Who issues building permits in Eagle County?: The county's page on building permits: Online Permit Portal. Inside a city or town, ask that city first.
Who issues septic and well permits in Eagle County?: The county's page on septic systems and wells: Avoid Bare Hand Contact.
Is my lot in a flood zone?: We do not have flood maps for Eagle County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

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