Oregon Geographic Names (OGN) states that a local story about the possible origin of the name "Monitor" is that it is derived from a type of flour mill, the Monitor mill, in use in the early days of the community.

Furthermore, the community of Monitor did not exist until 1869, when the post office was established, and this was apparently the first use of the name for the locality.

Each spring, a tulip festival is held at the Wooden Shoe Tulip Farm about one mile north of the town center, across Butte Creek in Clackamas County.

Monitor shares its ZIP codes with the nearby cities of Woodburn (97071) and Mt.

This Marion County, Oregon state location article is a stub.