Lek Nana (Thai: เล็ก นานา; 1924 – April 1, 2010) was a Thai businessman and politician. One of the founders of Thailand's Democrat Party at the end of World War II, he served as Deputy Foreign Minister as well as Minister of Science, Technology, and Energy. A Muslim of Gujarati ancestry, he was a senior member of the Central Islamic Committee of Thailand. The Nana area on Sukhumvit Road derives its name from him.
Nana became Deputy Foreign Minister in 1975 under Prime Minister Seni Pramoj, losing his office in the military coup that followed the October 1976 massacre of leftist protesters at Thammasat University.
He served as an honorary consul-general for Iraq in Thailand until 1981. In December 1982, a powerful bomb exploded in his office building in Bangkok's Chinatown, killing a police bomb disposal expert, injuring 20 other people, and causing a fire that damaged five buildings. Nana was not in the office at the time. His office had formerly been the Iraqi consulate, and a connection to the Iran-Iraq War was suspected to have been the reason.
In 1982 Nana became secretary general of the Democrat Party under party leader Bhichai Rattakul. He also served on the party's executive board repeatedly.
In 1985, Prime Minister Prem Tinsulanonda appointed Nana as Minister for Science and Technology, following the suicide of the previous minister, Damrong Latthapipat, said to have been displeased by the inadequate funding he had received.
Nana was nicknamed the "landlord of Bangkok" and owned a great deal of property along Bangkok's Sukhumvit Road, especially in the area is now known as "Soi Nana" (Sukhumvit Soi 4). The name Nana is also used for the nearby Skytrain station, the Nana Hotel and the Nana Plaza entertainment complex.