This is a list of cities, towns, unincorporated communities, counties, and other places in the U.S. state of Arizona, which start with the letter O. This list is derived from the Geographic Names Information System, which has numerous errors, so it also includes many ghost towns and historical places that are not necessarily communities or actual populated places. This list also includes information on the number and names of counties in which the place lies, its lower and upper ZIP code bounds, if applicable, its U.S. Geological Survey (USGS) reference number(s) (called the GNIS), class as designated by the USGS, and incorporated community located in (if applicable).
Grove Oak is a small unincorporated community in DeKalb County, Alabama, United States. It is located atop Sand Mountain in northeastern Alabama.
Montmorenci is an unincorporated census-designated place in Shelby Township, Tippecanoe County, Indiana. Older maps sometimes spell the name Montmorency or Montmorencie.
Oak Grove is an unincorporated community and census-designated place (CDP) in Moreland Township, Pope County, Arkansas, United States. It was first listed as a CDP in the 2020 census with a population of 177.
Oak Grove is a census-designated place in northern San Diego County, California, United States. The community is on California State Route 79, 22 miles (35 km) east-southeast of Temecula. It is home to the Oak Grove Butterfield Stage Station.