John Wyndham Parkes Lucas Beynon Harris (10 July 1903 – 11 March 1969) was an English science fiction writer best known for his works published under the pen name John Wyndham, although he also used other combinations of his names, such as John Beynon and Lucas Parkes. Some of his works were set in post-apocalyptic landscapes.

His best known works include The Day of the Triffids (1951), filmed in 1962, and The Midwich Cuckoos (1957), which was filmed in 1960 as Village of the Damned, in 1995 under the same title, and again in 2022 in Sky Max under its original title.

Wyndham was born in Warwickshire and spent most of his childhood in private education in Devon and Hampshire. He tried several careers before publishing a novel and several short stories. He saw action during World War II and went back to writing afterwards, publishing several very successful novels, and influencing a number of other writers who followed him. On the plausibility of his writing, The Guardian states his "innocuously English backdrops are central to the power of his novels, implying that apocalypse could occur at any time — or, indeed, be happening in the next village at this moment", while The Times's reviewer of The Day of the Triffids described it as possessing "all the reality of a vividly realised nightmare."

John Wyndham's reputation rests mainly on the first four of the novels published in his life under that name. The Day of the Triffids remains his best-known work, but some readers consider that The Chrysalids was really his best. This is set in the far future of a post-nuclear dystopia where genetic stability is compromised and women are severely oppressed if they give birth to "mutants". David Mitchell, author of Cloud Atlas, wrote of it: "One of the most thoughtful post-apocalypse novels ever written. Wyndham was a true English visionary, a William Blake with a science doctorate."

The ideas in The Chrysalids are echoed in The Handmaid's Tale, whose author, Margaret Atwood, has acknowledged Wyndham's work as an influence.

Wyndham also wrote several short stories, ranging from hard science fiction to whimsical fantasy. Several have been filmed: "Consider Her Ways", "Random Quest", "Dumb Martian", "A Long Spoon", "Jizzle" (filmed as "Maria") and "Time to Rest" (filmed as No Place Like Earth). There is also a radio version of "Survival".

Wyndham married Grace Wilson in 1963; he had known her for more than 30 years. They lived in Petersfield, Hampshire, where he died in 1969.

"I really enjoyed going back to the mid fifties to recall the time spent with the Wyndham Sci-fi stories. The writing is a little dated now, but overall I really enjoyed listening to this classic sci-fi story!" - Audible review

"Excellent version of a sci-fi classic! Although I've read and heard various versions of this a number of times over the years, I found the narration engaging and sympathetic ... I liked the laid back but involving style. Certainly one of the best renditions and a great introduction to the classic works of John Wyndham." - Amazon.com review

"Fantastic! Never judge a book by its movie and this is ESPECIALLY relevant to Wyndham's books. John Wyndham was a genius. What an imagination. I listen to his best 4 -5 books every few years. Brilliant!! But Triffids is the best! And yet, here we are messing with genes in plants and animals .... If a strange meteorite storm happens ... don't look at it and carry weed killer (or flame throwers)! Highly recommend to the lovers of good science fiction." - Booktopia review