Efraïn Jonckheer was a businessman and politician of the Netherlands Antilles. Jonckheer served as Prime Minister of the Netherlands Antilles from 8 November 1954 until 14 February 1968. He served as Minister Plenipotentiary of the Netherlands Antilles from 1968 until 1971, Ambassador of the Netherlands to Venezuela from 1971 until 1976, and to Costa Rica from 1976 until 1982. As of 2022, Jonckheer was the longest serving Prime Minister in the history of the Kingdom of the Netherlands.

Below is a list of prime ministers of the Netherlands Antilles from 1951 to 2010. In 2010 the position of Prime Minister of the Netherlands Antilles was abolished, together with the dissolution of the country itself.