This year's race is on Sunday, moving from its traditional Saturday slot.
"Assen has been present since the beginning in 1949. It’s really fantastic and a big honour to renew with the circuit of Assen for the next 10 years," said Carmelo Ezpeleta, chief executive of MotoGP promoters Dorna.
Ezpeleta said contract extensions were normally for five years but Assen had been given 10 due to the circuit's need for guarantees as a result of a five to seven-year programme of investment in upgrading the facilities.
(Reporting by Alan Baldwin, editing by Ed Osmond)