Essex is an unincorporated community and census-designated place in Flathead County, Montana, United States.

Amtrak's Empire Builder makes a flag stop at Essex station, westbound at 7:41 pm and eastbound at 8:55 am.

The Izaak Walton Inn hotel is close to the Amtrak station platform.

Named for a county in England, Essex (originally known as Walton) began as a small town on the Great Northern Railway’s main line in 1890.

[3] Essex is also home to the Glacier-Waterton hamfest, which claims to be the oldest continually running such amateur radio event in the world, beginning in 1934 and held during the third full weekend in July at an area RV park.