Deer is an unincorporated community and census-designated place (CDP) in Newton County, Arkansas, United States.

Deer is located on Arkansas Highway 16, 12.5 miles (20.1 km) south of Jasper.

Deer has a post office with ZIP code 72628.

[2] It was first listed as a CDP in the 2020 census with a population of 135.

[4] Due to its altitude, Deer is perhaps the only populated place in the central USA with a humid continental climate (Cfa) that borders on a temperate highland climate (Cfb), with average highs and lows comparable to parts of Western Oregon or Lyon, France.