Marr (Scottish Gaelic: Màrr) is one of six committee areas in Aberdeenshire, Scotland. It has a population of 34,038 (2001 Census). Someone from Marr is called a Màrnach in Scottish Gaelic.

In business and engineering, the minimum acceptable rate of return, often abbreviated MARR, or hurdle rate is the minimum rate of return on a project a manager or company is willing to accept before starting a project, given its risk and the opportunity cost of forgoing other projects. A synonym seen in many contexts is minimum attractive rate of return.