These will mark the 19th and 20th editions of broadcast television's longest-running reality competition series.
Jeff Probst, who won the Emmy Award for outstanding host for a reality or reality competition series, will continue as host, CBS said.
"'Survivor' is one of CBS's signature series and a symbol of enduring quality and entertainment on prime-time television," Nina Tassler, president of CBS Entertainment, said in a statement. "Every season delivers a fresh new adventure for viewers and a time period-winning performance on the network. We're excited to deliver audiences two more editions of outstanding production values, exotic scenery, new castaways and, of course, our Emmy Award-winning host."
"I am happy to be able produce two more editions of survivor for our loyal fans," added Mark Burnett, executive producer of "Survivor." "Our show stands for high-quality family entertainment and all of us on this team will continue to deliver on this promise."
"We have a unique relationship with our audience," said Probst. "They tell us what they like and we listen. It's worked for 18 editions and we're looking forward to delivering two more satisfying seasons."