Lenoir Rock (Bulgarian: скала Леноар, romanized: skala Lenoir, IPA: [skɐˈla lɛnoˈɐr]) is the rock off the NW coast of Smith Island in the South Shetland Islands, Antarctica 230 m long in southwest-northeast direction and 85 m wide with a surface area of 1.29 ha.

The vicinity was visited by early 19th century sealers.

[1] The feature is named after Étienne Lenoir (1744-1832), a Belgian-French scientific instrument maker and inventor of the repeating circle; in association with other names in the area deriving from the early development or use of geodetic instruments and methods.

Lenoir Rock is located at 62°56′54″S 62°33′04″W / 62.94833°S 62.55111°W / -62.94833; -62.55111,[2] which is 380 m southwest of Jireček Point and 1.85 km northeast of Villagra Point.

This article includes information from the Antarctic Place-names Commission of Bulgaria which is used with permission.