Strong is a city in Union County, Arkansas, United States.

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

As of the census[7] of 2000, there were 651 people, 256 households, and 171 families residing in the city.

There were 285 housing units at an average density of 254.5 per square mile (98.3/km2).

30.5% of all households were made up of individuals, and 14.1% had someone living alone who was 65 years of age or older.