Joan Maetsuycker (14 October 1606 – 24 January 1678) was the Governor of Zeylan during the Dutch period in Ceylon and Governor-General of the Dutch East Indies from 1653 to 1678. He was appointed as Governor of Zeylan in 24 March 1646 and was Governor until 26 February 1650. He was succeeded by Jacob van Kittensteyn.

 

Maetsuycker studied law in Leuven, and was a lawyer first in The Hague, and later in Amsterdam. From 1636, he lived in the Dutch East Indies. In 1646 he became the third Dutch Governor of Zeylan, and seven years later, the Governor-General of the Dutch East Indies. He stayed on that post for 25 years, which is the longest period for any Governor-General. The Dutch colony in the Indies flourished under Maetsuycker. Under his rule, the Portuguese lost Ceylon (1658), the coast of Coromandel (1658) and Malabar (1663); Makassar was conquered (1667), the west coast of Sumatra was occupied, and the first expedition to the interior of Java was held.