Mafa is a Local Government Area of Borno State, Nigeria. Its headquarters are in the town of Mafa.

It has an area of 2,869 km2 and a population of 103,518 at the 2006 census.

The postal code of the area is 611.

It is one of the sixteen LGAs that constitute the Borno Emirate, a traditional state located in Borno State, Nigeria.

On 2 February 2015, the Nigerian Army said it had recaptured Mafa from Boko Haram, along with the nearby towns of Gamboru, Abadam, Mallam Fatori, and Marte, following joint military operations by Nigerian and Cameroonian forces, civilian forces, and three days of Chadian airstrikes