Dyer is a city[3] in Crawford County, Arkansas, United States.

It is part of the Fort Smith, Arkansas-Oklahoma Metropolitan Statistical Area.

[6] Dyer is located in southeastern Crawford County in the Arkansas River valley.

According to the United States Census Bureau, Dyer has a total area of 2.6 square miles (6.8 km2), all land.

[4] As of the 2020 United States census, there were 772 people, 277 households, and 211 families residing in the city.