Lonsdale is a town in Garland County, Arkansas, United States.

Lonsdale is located in eastern Garland County on Highway 171, south of U.S. Route 70.

According to the United States Census Bureau, the town has a total area of 0.42 square miles (1.1 km2), all land.

28.6% of all households were made up of individuals, and 12.2% had someone living alone who was 65 years of age or older.

There were 14.7% of families and 22.3% of the population living below the poverty line, including 35.9% of under eighteens and none of those over 64.