The group's Liam Payne made the announcement in a Twitter post yesterday.
"Infinity is the next single off #MadeInTheAM!" so he wrote.
The track is the third single to be lifted off the boys' fifth studio installment, following "Drag Me Down" and "Perfect" which both peaked inside the top 10 of Billboard Hot 100.
Written by Jamie Scott, John Ryan and Julian Bunetta, the song was previously dropped as a promotional single.
The British-Irish boyband performed it live for the first time during their recent visit to BBC's "Live Lounge".
MITAM came out on November 13 as the foursome's parting gift before they go on a lengthy hiatus next year.