My Local Guide

River Towns Framed by Forested Mountain Views

Sanders County, Montana

Explore Sanders County, Montana, through Thompson Falls, the Clark Fork corridor and communities around Plains and Trout Creek. This guide brings local places and practical public resources together so you can plan an outing, find a service or get to know the area. Start with Thompson Falls, the county seat, then explore the communities and landscapes around it. Follow the linked organizations for current schedules, access details and the information you need before heading out.

County at a Glance

Population14,062 (2025 estimate)
County seatThompson Falls
Largest communityThompson Falls
Established1905
ZIP coverage12
Total area2,789.9 sq mi (land and water; 2020 boundary data)
Major routesMT 200, MT 28
Area code406
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Meet Local Businesses

Support the businesses that help make our communities thrive. From family-owned shops and restaurants to trusted local services, discover businesses worth visiting throughout the county.

Greenfield County courthouse
Discover Sanders County

Sanders County

Sanders County was established in 1905, with Thompson Falls as its county seat. The Clark Fork corridor links towns and wooded mountain landscapes, while railroad and forest-related work helped shape community development. Plains and Trout Creek offer additional perspectives on the county’s river connections and local life. Historic interpretation, public services, agriculture and recreation each contribute to the area’s character. Traveling through the county reveals both a working landscape and a collection of communities whose identities are tied to the rivers and mountains around them.

Residents balance local routines with travel between communities along the river corridor. Thompson Falls provides county offices and services, while Plains and other towns have their own shops, health resources and gathering places. A visitor can combine community history with an outdoor outing, provided seasonal access and fees are checked first. Follow the individual park and business links for current details, and use the county’s public-service resources when planning practical needs. Weather and road conditions are useful checks before any longer trip.

What shapes us

Living Heritage

Discover how river crossings, railroad links and forest-related community development helped shape local identity. Historic places and community organizations offer starting points for understanding the county’s past and its continuing story.

Working Landscapes

Explore the Thompson Falls river setting and nearby state-park recreation alongside the landscapes that support everyday life. Local businesses and outdoor destinations connect the county’s natural setting with practical work and recreation.

Community Connections

Small-town services, local history, river recreation and community events bring residents and visitors into the same local places. Follow current programs and schedules to find opportunities that match your interests and the season.

Find your next connection in the places around you.
Sanders County Ledger

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Meet Local Businesses

Support the businesses that help make our communities thrive. From family-owned shops and restaurants to trusted local services, discover businesses worth visiting throughout the county.

Useful connections

Sanders County resources

Find official agencies and useful organizations for everyday needs. Open the relevant resource for current services and contact information.

Find your way around Sanders County

Practical answers for residents and visitors.

Local knowledge

Frequently asked questions

Start here, then follow the linked organization for current details.

Thompson Falls is the county seat of Sanders County. Start with Sanders County government for department contacts and public services.

Shop - Dine - Discover

Meet Local Businesses

Support the businesses that help make our communities thrive. From family-owned shops and restaurants to trusted local services, discover businesses worth visiting throughout the county.

My Local Guide

Find something fun

Explore local places

Plan your next stop with these specific local destinations.

Make time for a local discovery.Choose a place and check its current details.
My Local Guide — Montana community guide.