Montgomery County may refer to:
Australia The former name of Montgomery Land District, Tasmania
United Kingdom The historic county of Montgomeryshire, Wales, also called County of Montgomery
United States Montgomery County, Alabama Montgomery County, Arkansas Montgomery County, Georgia Montgomery County, Illinois Montgomery County, Indiana Montgomery County, Iowa Montgomery County, Kansas Montgomery County, Kentucky Montgomery County, Maryland Montgomery County, Mississippi Montgomery County, Missouri Montgomery County, New York Montgomery County, North Carolina Montgomery County, Ohio Montgomery County, Pennsylvania Montgomery County, Tennessee Montgomery County, Texas Montgomery County, Virginia
See also List of places named for Richard Montgomery Lemuel P. Montgomery