Awarding the album four stars at CCM Magazine, Andy Argyrakis states, "there’s basically something for everyone on one of this season’s most inviting."[3] Christopher Smith, rating the album four stars from Jesus Freak Hideout, writes, "MercyMe, It's Christmas! is a huge success and sets a high bar for the rest of the Christmas releases this year. Though you might not be ready for it, it is a spectacular addition to any Christmas music collection."[6] Giving the album four and a half stars for New Release Today, Caitlin Lassiter says, "It's Christmas is certainly a success as far as Christmas records go and is sure to be the soundtrack to many holiday festivities in homes around the country this season."[7]
Allocating the album a nine out of ten for Cross Rhythms, Brendan O'Regan writes, "Mind you they might also be moved to dance by the pacey numbers."[4] Joshua Andre, indicating in a four star review by 365 Days of Inspiring Media, says, "MercyMe have crafted a fine effort".[2] Assigning the album nine stars out of ten at The Front Row Report, Reggie Edwards responds, "MercyMe have outdone themselves".[5] Sarah Baylor, signaling in a 4.8 out of five review from The Christian Beat, replies, "MercyMe has managed to create a brilliant Christmas album that contains their own unique, spirit-filled sound."[8]