 The episode received overwhelmingly positive reviews from critics. Eric Goldman of IGN gave the episode a score of 9.5 out of 10, a series high alongside "Chuck Versus the Colonel", Season 3's "Chuck Versus the Beard" and "Chuck Versus the Subway", Season 4's "Chuck Versus the Cliffhanger", and Season 5's "Chuck Versus the Kept Man" and "Chuck Versus the Goodbye". Goldman described the episode as an "especially strong installment, which delivered on a lot of fronts." Goldman praised the scene depicting Sarah and Mauser's confrontation, writing, "The entire ambience of the scene was terrific – a rainy night at a Christmas tree lot, with Chuck secretly watching as Sarah shot the unarmed, surrendering Mauser in cold blood - to the tune of 'Silent Night', no less. Of course she did this because she loves Chuck and wants to protect him, but all Chuck knows is that he just saw Sarah in a very scary light, and it's a great new dynamic to their relationship." HitFix writer Alan Sepinwall wrote, "Chuck vs. Santa Claus" was moving along amusingly enough when it still seemed like Ned Rhyerson was just a hapless criminal with the bad luck to crash into a store built above a top-secret government intelligence facility, but the surprising left turn it took when Chuck flashed on Lt. Mauser took things to another level. "Steve Heisler of The A.V. Club gave the episode an A-, writing" Santa Claus certainly delivered (character) goodies to everyone tonight. Morgan gets to be a hero, even if no one notices, taking down Ned with a fake snow machine. Jeff calls his mother – in prison – then finds the time to break up a mistletoe makeout session. Lester sneaks a smooch from Anna, and isn't even remotely fazed when it causes her to run for the hills. And Big Mike's embrace of cousin Big Al is a keeper. "
