Longmont Colorado Genealogy Records
Longmont is a city on the plains northeast of Boulder. Over 99,000 people live here. The city was founded in 1871. It began as a planned community. The Chicago-Colorado Colony created it. The name means "Long Mountain" in French. It refers to Longs Peak visible from the city. Genealogy research here spans two counties.
The city spans Boulder and Weld counties. Most of Longmont is in Boulder County. The eastern part extends into Weld County. This affects where records are kept. You must know which county your ancestors lived in. This determines where to search.
Longmont Quick Facts
County Records for Longmont
Finding records in Longmont requires checking two counties. Most of the city is in Boulder County. This includes the western areas. The Weld County portion is in the east. You must know which county your ancestors lived in. This determines where to search.
For Boulder County portions, contact their Clerk and Recorder. They are in Boulder. For Weld County portions, contact their office in Greeley. Each office maintains marriage and land records. Birth and death records go through the state.
| Primary County | Boulder County Clerk and Recorder 1750 33rd Street, Boulder, CO 80301 303-413-7740 |
|---|---|
| Secondary County | Weld County Clerk and Recorder 1401 N. 17th Avenue, Greeley, CO 80631 970-304-6520 |
Records Available for Longmont
Marriage records for Longmont are in the county of the ceremony. If married in Boulder County, records are in Boulder. Weld County marriages are in Greeley. Land records follow the same rule. Property records are in the county where the land sits.
The Colorado State Archives holds older records. They have documents from both counties. You can search their database online. C.R.S. 24-80 guides records management. Birth and death records are at CDPHE. Older ones may be at the archives.
- Marriage licenses by county of ceremony
- Land records in county of property
- Court records at appropriate district court
- Probate records by county
- Census records for all areas
The Longmont Museum preserves local history. They have exhibits on the Chicago-Colorado Colony. The museum can help with research. They focus on the city's founding.
Local Genealogy Resources
The Longmont Library is excellent. They are part of the High Plains Library District. They offer access to genealogy databases. You can use Ancestry Library Edition there. They also have local history materials.
The Colorado State Archives is in Denver. They hold historical records from both counties. You can search their database first. Then visit to view original documents. Bring a photo ID for entry.
The Longmont Historical Society maintains archives. They have photos and documents from the city's past. This can help with family history research.
Colorado State Resources
The Colorado State Archives is essential for Longmont research. They have records from Boulder and Weld counties. Births before 1908 may be found there. Deaths before 1900 are also held there. The Archives Search database is free to use.
CDPHE Vital Records has certificates from 1900 onward. They are at 4300 Cherry Creek Drive South, Denver. Call 303-692-2200. Under C.R.S. 25-2-117, some records are confidential.
Other helpful resources include:
- Colorado State Archives: archives.colorado.gov
- Archives Search: Online database
- FamilySearch: familysearch.org
- VitalChek: vitalchek.com
- Colorado Historic Newspapers: coloradohistoricnewspapers.org
Nearby Cities
Longmont is near several other cities. Your ancestors may have lived in these areas. Check nearby jurisdictions for complete research.