Elstow Abbey was a monastery for Benedictine nuns in Elstow, Bedfordshire, England. It was founded c.1075 by Judith, Countess of Huntingdon, a niece of William the Conqueror, and therefore is classed as a royal foundation.

Elstow is a village and civil parish in the Borough of Bedford, Bedfordshire, England, about 2 miles (3.2 km) south of Bedford town centre.