Based on the 2010 Census, Montana currently has 19 qualifying urban and urbanized areas with population of 5,000 or greater. In conjunction with the 2010 Census and in accordance with FHWA Urban Boundary Criteria, MDT staff has worked with local officials to conduct urban boundary reviews based on the latest decennial Census. The adjusted boundaries must encompass Census-defined urban areas and are subject to approval by the Secretary of Transportation [23 USC 101 (a) (36)-(37) and 49 USC 5302(a) (16)-(17)]. The revised boundaries, including the new urban areas of Columbia Falls, Glendive, Hamilton, and Sidney, were developed in cooperation with local officials and have been discussed with a representative of FHWA. MDT staff have reviewed associated roadways for functional and logical connectivity and termini and identified associated functional classification changes.

Based on the 2020 Census, Montana currently has 20 qualifying urban and urbanized areas with population of 5,000 or greater. In conjunction with the 2020 Census and in accordance with FHWA Urban Boundary Criteria, MDT staff has worked with local officials to conduct urban boundary reviews based on the latest decennial Census. The adjusted boundaries must encompass Census-defined urban areas and are subject to approval by the Secretary of Transportation [23 USC 101 (a) (36)-(37) and 49 USC 5302(a) (16)-(17)]. The revised boundaries, including the new urban area of Polson, were developed in cooperation with local officials and have been discussed with a representative of FHWA. MDT staff have reviewed associated roadways for functional and logical connectivity and termini and identified associated functional classification changes.