Essex is an unincorporated community in Flathead County, Montana, United States. Located in the northwestern part of the state, Essex lies near Glacier National Park, southwest of East Glacier and southeast of West Glacier. Amtrak's Empire Builder makes a flag stop at Essex, westbound at 7:41pm and eastbound at 8:55am. The Izaak Walton Inn hotel is by the Amtrak station platform. Essex also is home to a BNSF Railway yard, where helper units used to push freight trains over Marias Pass are based.