Dupuyer is a census-designated place and unincorporated community situated within Pondera County in the state of Montana, United States. It occupies a specific geographic position along the course of Dupuyer Creek, which serves as a natural border for the settlement. The community is defined by its rural character and lack of municipal incorporation, functioning instead as a distinct statistical entity for demographic purposes within the broader county administration.

The origins of Dupuyer trace back to 1877 when it began as a stagecoach stop on the historic Fort Benton–Fort Browning road. This early transportation role established its initial significance in the region. The community derives its name directly from Dupuyer Creek, which borders the town and provides the geographical anchor for its identity. This foundational history as a transit point on a major route shaped its early development.

The physical character of the place is defined by its location along U.S. Route 89 and the adjacent waterway. Infrastructure includes a post office that serves the local population with the ZIP code 59432. Educational facilities are organized into the Dupuyer Elementary School District and the Valier High School District, indicating the administrative structure for local schooling despite the unincorporated status of the community itself.

As an unincorporated rural community, Dupuyer does not feature commercial tourist attractions such as museums, festivals, or distinct culinary traditions in the provided records. Its appeal lies primarily in its historical context as a former stagecoach stop and its quiet, semi-arid environment. Visitors or residents experience a landscape shaped by its geographic isolation and historical role in regional transportation networks rather than curated cultural events.

According to the 2020 census, Dupuyer had a population of 93 residents. The local economy is not detailed beyond the existence of the post office and schools. Transportation access is provided via U.S. Route 89. The climate is classified as semi-arid under the Köppen system, abbreviated as BSk on climate maps, which influences the environmental conditions and seasonal patterns experienced by those living in this part of Montana.