Western Grove is a town in northeastern Newton County, Arkansas, United States.

According to the United States Census Bureau, the town has a total area of 2.8 km2 (1.1 mi2), all land.

As of the 2020 United States census, there were 354 people, 186 households, and 136 families residing in the town.

As of the census[5] of 2000, there were 407 people, 169 households, and 126 families residing in the town.

24.3% of all households were made up of individuals, and 11.8% had someone living alone who was 65 years of age or older.