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Graphic of the state of Michigan with subset close up of Clinton, Eaton, and Ingham counties

Who We Are

The Tri-County Regional Planning Commission is a public planning agency established in 1956, serving Clinton, Eaton, and Ingham counties in Mid-Michigan. Tri-County makes our region a more prosperous community by planning for a strong economy, reliable transportation, and sustainable infrastructure and natural resources.


We are dedicated leaders and innovators, connecting local organizations and governments to funding, technical assistance, data resources, and opportunities to discuss trends and challenges affecting the Greater Lansing area.

Our Mission & Vision

The Tri-County Regional Planning Commission leads innovative public planning for Clinton, Eaton, and Ingham counties to foster prosperity in Mid-Michigan's communities.

We believe in developing a sustainable future for our region's economy, natural resources, and transportation system and infrastructure.


Tri-County is directed by a board of 19 commissioners representing the three counties, City of Lansing, and public transportation agencies. They come together to resolve problems and guide development of the Greater Lansing area with a regional perspective, looking past county and municipal boundaries for the greatest good of our region’s citizens.

History & Designations

The Tri-County Regional Planning Commission was formed under the Regional Planning Act, PA 281 of 1945. It was established pursuant to resolutions adopted by the Boards of Supervisors of Clinton, Eaton, and Ingham counties on July 18, 1956. Membership was expanded to include the City of Lansing in 1974. Tri-County serves 75 jurisdictions within the three-county region.

Tri-County is designated as the region’s Metropolitan Planning Organization (MPO) to coordinate federally funded transportation projects. The Commission is also certified by the U.S. Department of Commerce as the Economic Development District (EDD) to facilitate federally funded economic development programs and initiatives, particularly in public infrastructure, in support of business locations and expansions. Learn more about our federal and state designations and legal responsibilities below.

  • Planning Areas
    Pavement Condition Safety & Operations Non-Motorized (Bicycle & Pedestrian Paths) Traffic Congestion Public Transit Freight (Movement of Goods) Regional Travel Passenger Air Passenger Rail Bus Services Air Quality (Conformity) Performance Measures Short-Range Planning (TIP) Long-Range Planning (MTP)
  • Quick Links & Resources
    Tri-County RPC Transportation Planning Projects Transportation Improvement Program (TIP) 2045 Metropolitan Transportation Plan (MTP) Capital Area Regional Transportation Study (CARTS) Michigan Transportation Planning Association Transportation Data & Maps Michigan Traffic Crash Facts Michigan Transportation Asset Management Council (TAMC) Michigan Department of Transportation Federal Highway Administration Federal Transit Administration Intelligent Transportation Society of America National Association of Regional Councils Interactive Road Construction Tool
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