The decision was made following a meeting on Monday night.
Mr Fenton-Glynn is a Calderdale councillor who currently represents the Calder ward. He works for a charity, lives in Hebden Bridge and has previously lived in Brighouse.
He also stood for the seat in 2015 when he went up against current Conservative MP Craig Whittaker, who has announced he will stand again.
“I have a track record as an energetic and committed local councillor and an active member of our community, and I look forward to getting out on the campaign trail,” he said.
Jane Rendle, Chair of Calder Valley CLP said: “We are excited to have a candidate who we know local people can believe in and Labour members are proud to get behind.”