About Tri-County Health Department

Tri-County Health Department is the health department for Adams and Arapahoe counties serving over 1.2 million people and provides public health services to Douglas County serving over 357,000 people. Our home office is in Greenwood Village, Colorado and we have ten other offices within the 3,000 square mile area of the three counties we serve. 

We offer over 60 programs and services ranging from birth certificates, immunizations, and health care referrals to restaurant inspections and infectious disease investigations. The agency's jurisdiction includes 26 municipalities and three unincorporated counties, 15 school districts with more than 360 public schools, 12 acute care hospitals, three Federally Qualified Healthcare Centers with multiple facilities, three community mental health service providers, and one Regional Collaborative Care Organization (Colorado Access).

The Public Health Accreditation Board awarded Tri-County Health Department accreditation in 2018. Accreditation means that Tri-County Health Department is committed to continuous quality improvement so that we can meet our community’s needs in improving health outcomes. Review our key documents and plans supporting our work to build community partnerships and to increase the overall health and wellbeing of the people we serve: 

Our History

Tri-County District Health Department opened on Jan. 1, 1948, serving 160,000 people in Adams, Arapahoe, and Jefferson counties. In 1958, Jefferson County separated to form its own local public health department. On Jan. 1, 1966, after the South Platte River Floods of 1965, Douglas County officially joined the Tri-County District Health Department. On Sept. 14, 2021, during the COVID-19 pandemic, Douglas County separated from Tri-County Health Department to form its own local public health department with an Intergovernmental Agreement for Tri-County Health Department to continue providing public health services through the end of 2022. Tri-County Health Department serves over 1.5 million people in Adams, Arapahoe, and Douglas counties. 

Statement of Inclusion

Tri-County Health Department values and welcomes people of all ages; ethnicities; genders; gender identities/expressions and sexual orientations; languages spoken; nationalities and cultures; physical, mental, and developmental abilities; races; religions; and, socio-economic, insurance, and immigration status.


Optimal health across the lifespan for the populations we serve.


Promote, protect and improve the lifelong health of individuals and communities in Adams, Arapahoe, and Douglas counties through the effective use of data, evidence-based prevention strategies, leadership, advocacy, partnerships, and the promotion of health equity.

Values and Guiding Principles

Values for the agency are demonstrated in the behavior and decisions of all our employees and in how we conduct our efforts in the communities we serve. Tri-County Health Department, its Board, and its employees have adopted these eight core values that guide behavior, organizational policy, and decision-making. These values not only apply to how we interact with each other internally, but how we treat our partners and clients externally.

  • Respect: We treat others with the same dignity as we wish to be treated. We honor the whole person and recognize the importance of work-life balance and diverse perspectives. We recognize the power of teamwork and appreciate the unique contributions that each member of a team can make.
  • Integrity: We maintain consistency in what we say and what we do. We uphold high ethical standards and maintain accountability to each other and the communities that we serve.
  • Courage: We stand up for what is right in the face of adversity. We communicate openly and welcome honest feedback. We advocate for those who cannot do it for themselves.
  • Excellence: We strive for the highest quality in everything that we do. We pursue opportunities and seek creative and innovative solutions to the challenges that face us.
  • Leadership: We believe that everyone can be a leader. We empower others to act; we encourage everyone to reach their fullest potential; and, we model our core values.
  • Collaboration: We seek to sustain and enhance the reach and impact of our efforts through respectful engagement with community partners (local, regional, and state).
  • Stewardship: We maintain good stewardship of public monies and facilities through active management and will always strive to provide high-quality, targeted, and cost-effective services for the community.
  • Innovation: We seek and encourage innovative approaches to address public health issues, reach diverse communities, and improve agency operation.

Services Brochure

Downloadable brochure in English and Spanish