Harby is a village and civil parish in the Newark and Sherwood district of Nottinghamshire, England.

It is close to Doddington, Lincolnshire, and is the easternmost settlement in Nottinghamshire, the boundary separating the two.

In the east wall of the tower is a statue in memory of Eleanor of Castile, Queen Consort of King Edward I of England.

The King ordered Eleanor crosses to be built at each place where her body had rested overnight on the journey.

The capless stump of a five-storey tower windmill, built about 1877, stands at the end of Mill Field Close (grid reference SK877707).