Cardwell is a census-designated place (CDP) in Jefferson County, Montana, United States.

[5] The Jefferson River forms the southern boundary of the community as well as the Madison County line.

Cardwell is located at the mouth of Jefferson Canyon,[6] a stretch of the river ending near Willow Creek, Montana.

Lewis and Clark Caverns, about 8 miles (13 km) to the east, offer tours during the summer.

During the development of the caverns into a state park area, the Civilian Conservations Corps used Cardwell as a base camp.

[16] It airs classic country music, emergency messages, and public interest items.

Cardwell is home to the annual Headwaters Country Jam music festival.

[17] Interstate 90 forms the northern edge of the community, with access from Exit 256 (Montana Highway 359).