[ToDo -- citations throughout]
The Oak Grove town site was first platted in 1890 from the original
Creighton and Crow donation land claims (DLCs) of the 1830s and 1840s.
Subsequent additions and subdivisions of the Oak Grove plat show clear
evidence that the area was marked for investment and growth as a result
of the trolley line's introduction early in 1893.
The author of Oregon Geographic Names credits a member of
the survey team for suggesting the name Oak Grove, based on an area they
came upon for lunch -- "a fine grove of oak trees in the northwest part
of the tract."
The town site's post office was opened in 1904. First called the
'Creighton Station' due to duplicate use of the name elsewhere on the
trolley line, the postal station name was changed permanently to 'Oak Grove'
when the confusion was sorted out and corrected in 1907.