Oak Grove is a part of Lindenwald. Its unofficial boundaries were Pleasant and Elmo avenues, east and west, and Belle and Williams avenues, north and south, according to Joe Cella, a Journal-News writer in the 1940s, who gathered this information "from hand-me-down stories" told to and by his father-in-law. Oak Grove became a part of Lindenwald which, in turn, was annexed to Hamilton. The name came from a giant oak tree which stood in Oak Grove. Its borders were similar to those of a later subdivision, Ludlow Grove.