Elstree Rural District (until 1941 known as Barnet Rural District) was a rural district in Hertfordshire, England from 1894 to 1974. It was formed under the Local Government Act 1894 as Barnet Rural District, as successor to the Barnet rural sanitary district. The rural district had an identical area to Barnet RSD except for the parish of South Mimms in Middlesex which went to form a single-parish South Mimms Rural District. The district was renamed Elstree Rural District in 1941. It was abolished in 1974, and merged with other districts to form the non-metropolitan district of Hertsmere.