Suan Luang was a sub-district of Phra Khanong District. When Phra Khanong district was split into smaller districts on 9 November 1989, Suan Luang became part of the new Prawet District. On 14 January 1994 (following its announcement on 8 October 1993) Suan Luang was elevated to a district, merging the area once belonging to Suan Luang Sub-district with additional land from Prawet and Khlong Toei. Suan Luang Sub-district remained the only sub-district until 2017, when the two new sub-districts of On Nut and Phatthanakan were created. Its name literally translates to "royal garden," named after a sub-district in the area that once existed during the early
Rattanakosin era (18th century). ==Administration==