How many email patterns does Jefferson County, Colorado use?

Jefferson County, Colorado uses 14 known email patterns.

What domain does Jefferson County, Colorado use for work emails?

Jefferson County, Colorado uses jeffco.us, co.jefferson.co.us for work email addresses.

Most Common Email Formats at Jefferson County, Colorado

Jefferson County, Colorado's most common email format is FLast@jeffco.us (ex. JDoe@jeffco.us), used for 80% of jeffco.us addresses. Jefferson County, Colorado uses 7 email patterns across 2 domains: jeffco.us and co.jefferson.co.us. Percentages are the share of addresses within each domain.

@jeffco.us

3 patterns

Format	Example	Share of jeffco.us
FLast@jeffco.usMost common	JDoe@jeffco.us	80%
First.Last@jeffco.us	John.Doe@jeffco.us	19%
LFirst@jeffco.us	DJohn@jeffco.us	1%

@co.jefferson.co.us

4 patterns

Format	Example	Share of co.jefferson.co.us
FLast@co.jefferson.co.usMost common	JDoe@co.jefferson.co.us	79%
Last@co.jefferson.co.us	Doe@co.jefferson.co.us	18%
FiLast@co.jefferson.co.us	JoDoe@co.jefferson.co.us	2%
F.Last@co.jefferson.co.us	J.Doe@co.jefferson.co.us	1%

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Browse Jefferson County, Colorado's employee directory (about 2.7K employees) and reveal verified emails free.

Frequently Asked Questions

What does Jefferson County, Colorado do?

Jefferson County, Colorado was founded in 1861 and operates in the Government Administration industry, alongside similar companies like Boulder County, Gunnison County and Pitkin County. You can visit jeffco.us or contact Jefferson County, Colorado's headquarters by phone at

+1-303-982-****

. Explore Jefferson County, Colorado's company overview page for more information.

What is Jefferson County, Colorado's email address format?

Jefferson County, Colorado's email format typically follows the pattern of FLast@jeffco.us; this email format is used 80% of the time. Other contacts within LeadIQ's database had email formats such as First.Last@jeffco.us and LFirst@jeffco.us. Looking for more contact data? Unlock accurate emails and phone numbers from millions of profiles verified in real-time.

How many employees does Jefferson County, Colorado have currently?

Jefferson County, Colorado has approximately 2.7K employees as of October 2026. Key team members to contact include Chief Executive Officer: A. M., Chief Information Security Officer: J. F. and Chief Compliance Officer: L. W. For more team information and contact data, explore Jefferson County, Colorado's employee directory with LeadIQ.

Jefferson County, Colorado Email Format

Government AdministrationColorado, United States1001-5000 Employees

Jefferson County, Colorado operates as a county-level government administration based in Golden, delivering a broad set of public services to residents. The organization supports professional growth and a diverse workforce within a long-standing tradition of public service. Its responsibilities span planning and development activities and the management of parks and open-space resources to serve the community, while its Golden location situates it near both historic city life and outdoor recreation opportunities. 

In July 2025, the county launched NextRequest, a platform to streamline how the public submits open records requests.

Most common format

FLast@jeffco.us

Example: JDoe@jeffco.us

7 patterns across 2 domains. See all formats

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Most Common Email Formats at Jefferson County, Colorado

@jeffco.us

@co.jefferson.co.us

Need a specific person's email?

Frequently Asked Questions

What does Jefferson County, Colorado do?

What is Jefferson County, Colorado's email address format?

How many employees does Jefferson County, Colorado have currently?

Jefferson County, Colorado Email Format

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What you can expect from LeadIQ:

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Everything for prospecting,
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