Adams County — 303-659-2120
broomfield.org
Alamosa County — 719-589-6365
alamosacounty.org
Arapahoe County — 303-795-4400
netronline.com
Archuleta County — 970-264-8310
e-caa.com
Baca County — 719-523-4332
bacacountyco.gov
Bent County — 719-456-2010
e-caa.com
Boulder County — 303-441-3530
bouldercounty.gov
Broomfield County (City & County of Broomfield) — 303-464-5819
broomfield.org
Chaffee County — 719-539-4016
chaffeecounty.org
Cheyenne County — (719) 767-5664
cheyenne.co.us
Clear Creek County — 303-679-2322
clearcreekcounty.us
Conejos County — 719-376-5585
e-caa.com
Costilla County — (719) 937-7670
costillacounty.gov
Crowley County — (719) 267-5229
qpublic.net
Custer County — 719-783-2218
e-caa.com
Delta County — 970-874-2120
e-caa.com
Dolores County — (970) 677-2385
netronline.com
Douglas County — 303-660-7450
e-caa.com
Eagle County — (970) 328-8640
eaglecounty.us
Elbert County — 303-621-3101
e-caa.com
Garfield County — 970-945-9134
garfieldcountyco.gov
Gilpin County — (303) 582-5451
opengov.com
Grand County — 970-725-3347
grand.co.us
Gunnison County — 970-641-1085
gunnisoncounty.org
Hinsdale County — 970-944-2225
e-caa.com
Huerfano County — 719-738-1191
e-caa.com
Jackson County — 970-723-4751
netronline.com
Jefferson County — 303-271-6511
jeffco.us
Kiowa County — 719-438-5521
kiowacounty-colorado.com
Kit Carson County — 719-346-8946
tylerhost.net
Larimer County — (970) 498-7050
larimer.gov
Las Animas County — (719) 846-2295
courthousedirect.com
Lincoln County — (719) 743-2049
e-caa.com
Logan County — (970) 522-0888
netronline.com
Mesa County — 970-244-1610
mesacounty.us
Mineral County — (719) 658-2331
mineralcountycolorado.com
Moffat County — (970) 824-9102
netronline.com
Montezuma County — (970) 565-3428
montezumacounty.gov
Morgan County — (not retrieved/verified yet)
Otero County — (not retrieved/verified yet).
Morgan County — 970-542-3512
tylerhost.net
Otero County — 719-383-3010
courthousedirect.com
Ouray County — 970-325-4371
e-caa.com
Park County — (not retrieved/verified yet)
Phillips County — 970-854-3151
e-caa.com
Pitkin County — 970-920-5160
pitkincounty.com
Prowers County — 719-336-8000
prowersco.gov
Pueblo County — 719-583-6597
pueblo.org
Rio Blanco County — 970-878-9410
rbc.us
Rio Grande County — (not retrieved/verified yet)
Rio Grande County — (719) 657-3326
tylerhost.net
Routt County — (970) 870-5544
routt.co.us
Saguache County — (719) 655-2521
tylerhost.net
San Juan County — (970) 387-5632
e-caa.com
San Miguel County — (970) 728-3174
sanmiguelcountyco.gov
Sedgwick County — (970) 474-2531
cichosting.com
Summit County — (970) 453-3480
summitcountyco.gov
Teller County — 719-689-2941
tellercounty.gov
Washington County Assessor (Colorado) — (970) 345-6662
cichosting.com
Weld County — (970) 400-3650
Yuma County — (970) 332-5032
yumacounty.net
County Assesors offices
Re: County Assesors offices
A county assessor’s office can help with the property and tax-record side of a mining claim, but it usually cannot determine whether a federal mining claim is legally valid.
It may help you find:
The owner of patented mining-claim land or other private property.
Parcel maps, legal descriptions, and assessor parcel numbers.
Tax records and recorded property transfers.
Easements, rights-of-way, and sometimes surface/mineral ownership information.
Whether a quarry or mine is treated as private property for assessment purposes.
Ask the assessor for records using the county name, parcel number, legal description, or mining-claim name. If the parcel is not in the regular tax system, that may indicate—but does not prove—that it is federal land or an unpatented claim.
For an unpatented federal mining claim, the assessor is usually not the primary source.
It may help you find:
The owner of patented mining-claim land or other private property.
Parcel maps, legal descriptions, and assessor parcel numbers.
Tax records and recorded property transfers.
Easements, rights-of-way, and sometimes surface/mineral ownership information.
Whether a quarry or mine is treated as private property for assessment purposes.
Ask the assessor for records using the county name, parcel number, legal description, or mining-claim name. If the parcel is not in the regular tax system, that may indicate—but does not prove—that it is federal land or an unpatented claim.
For an unpatented federal mining claim, the assessor is usually not the primary source.