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

[3] Construction of the Mississippi, Ouachita and Red River Railroad—the first chartered railway in Arkansas—began in 1852, and 7 mi (11 km) of track had been laid west from Eunice by the start of the Civil War.

The railroad was completed after the war, but abandoned in 1875 after flooding on the Mississippi River damaged the railbed and bridges.

[3] In 1901, a line of the Missouri Pacific Railroad was built through Halley.

[7] The Halley Volunteer Fire Department is located in the settlement.