The Honolulu Star-Bulletin dismissed entertainment reporter Tim Ryan for plagiarising content in six stories written since April 2001.
Wikipedia editors were first alerted to Mr Ryan's work during analysis of a feature he wrote on a Hawaiian airline disaster.
Contributors flagged up their discovery in one of Wikipedia's 'signpost' entries and an investigation at the newspaper followed.
In a message to readers, editor Frank Bridgewater said the stories did not contain inaccurate information but used phrases copied from the online encyclopedia. Most of the stories have since had correction notes added.
Many in the traditional media do not consider Wikipedia to be a reliable source of information but a recent study found its standards of accuracy to be comparable with Encyclopedia Brittanica.
More news from journalism.co.uk:
New York Times fooled by online myth
Site showcases miner reporting gaffes
Clash of the titans: old vs new media
Wikipedia vs Brittanica is a close call, research finds
Wikipedia prankster confesses to false posting
Journalism stalwart condemns 'flawed' Wikipedia
Free daily newsletter
- NYT uses data visualisation to bring climate change home. Literally.
- The Week in Good News, a weekly newsletter from the NYT, acts as an antidote to the daily news cycle
- NYT uses new interactive design to report on sexual consent on campuses
- Shifting focus from offers to promoting its journalism, The New York Times continues to build its subscriber base
- Throwback Thursday: What media stories made headlines in August 2010 and why?