McKenzie is an unincorporated community in Allegany County, Maryland, United States.

Its name is derived from a family which owned a large farm along the river bottom in the area. It is located directly across from the Allegany Ballistics Laboratory in Rocket Center, West Virginia. The area was formerly a railroad junction of the Patterson Creek Cutoff and the main B&O line. McKenzie is also the site of one of the first settlements in Allegany County. In the fields of the river bottom, arrowheads and flint can be found, suggesting a possible Native American community at one time, similar to the Barton, Maryland site.