John Guy Chewings (14 April 1920 – 12 September 1994) was a New Zealand politician of the National Party.
Chewings was born in 1920 at Invercargill. He received his education at Waitaki Boys' High School. During World War II, he was a flying instructor for the Royal New Zealand Air Force.
He represented the Invercargill electorate in Parliament from 1969 to 1972, when he was defeated.
The year after his defeat, he moved to Whangarei.