A.M. garnered generally positive reception by music critics to critique the album. At Allmusic, Stephen Thomas Erlewine told that the release was "steeped in modern vernacular", and showed Young "brightening up his sound by leaning on cheerful, chipper pop hooks and a production so gleaming it shows his reflection; he has even chosen to smile on his album cover for the first time ever." Lee Zimmerman of American Songwriter wrote that "In the hands of a wannabe, the aforementioned songs might sound somewhat cloying, but given Young’s rugged vocals and apparent reservoir of conviction, the emotions ring true." At Entertainment Weekly, they felt that Young "survives on his fourth album, but too often he falls into the "bro country" trap currently plaguing the genre." Bob Paxman at Country Weekly stated that "this disproves the popular belief that nothing good ever happens in the a.m. There’s plenty of good stuff here." At Roughstock, Matt Bjorke affirmed that "Everything about A.M. screams star-making and with a hard core collection of fans who already help him headline venues across The USA, Chris Young's only destined for bigger things because of A.M.."