Acorn Ridge or Acornridge is an unincorporated community in Stoddard County, in the U.S. state of Missouri. The community is on Missouri Route J, approximately seven miles west of Bloomfield.
A post office called Acorn Ridge was established in 1860, and remained in operation until 1909. The community was named for the acorn oak timber near the original town site. A variant spelling was "Acornridge".