Wilmar is a city in Drew County, Arkansas, United States.

Wilmar is located in western Drew County along U.S. Route 278, which leads east 8 miles (13 km) to Monticello, the county seat, and west 8 miles (13 km) to Warren.

According to the United States Census Bureau, Wilmar has a total area of 1.6 square miles (4.1 km2), all land.

The racial makeup of the city was 27.50% White, 71.80% Black or African American, 0.18% Pacific Islander, and 0.53% from two or more races.

29.0% of all households were made up of individuals, and 12.6% had someone living alone who was 65 years of age or older.