"Christmas Tree Farm" is a Christmas song by the American singer-songwriter Taylor Swift. She wrote it on December 1, 2019, inspired by her affection for the holiday season, and produced it with Jimmy Napes. Republic Records released the track as a single on December 6 of that year. Opening with a 1950s-inspired jazzy intro, "Christmas Tree Farm" is a pop song driven by an upbeat arrangement, orchestral treatment, and jingle bells. The lyrics are about Swift's childhood memories of Christmas.

Music critics have praised "Christmas Tree Farm" as catchy and its lyricism as nostalgia-inducing; they have retrospectively listed it as one of the best Christmas songs. It reached number 91 on the Billboard Global 200 chart and the top 30 on the national charts of Croatia, Flanders, Hungary, and Scotland. The track received gold certifications in Australia, New Zealand, and the United Kingdom.

Swift directed the music video for "Christmas Tree Farm", which features childhood home footage of her and her family. She performed the song live in 2019 at the Jingle Bell Ball in London and the iHeartRadio Jingle Ball in New York City; the live version from the latter was released digitally in December 2020. An "Old Timey Version" of the track, in which the orchestral accompaniment is more emphasized along with elements of swing music, was released to digital music platforms in November 2022.

Having grown up in Pine Ridge Farm, a Christmas tree farm in Pennsylvania, Taylor Swift has expressed her love for the holiday season throughout her career and her desire for it to be "all year round". She stated that she helped her dad manage the farm during her childhood and that the environment influenced her affection for the season. Swift's first Christmas record, The Taylor Swift Holiday Collection (2007), features four covers of Christmas classics and two original tracks that she co-wrote.

Swift wrote, recorded, and released "Christmas Tree Farm" in under six days. She wrote the song on piano on December 1, 2019, and recorded her vocals the following day. On December 3, a group of choral singers provided background vocals. Swift announced the track on Good Morning America on December 5, before Republic Records released it as a single the following day. A behind-the-scenes video that showcases the song's creation process was released on December 23, 2019.

Republic Records released a live recording from iHeartRadio's 2019 Jingle Ball for digital download and streaming on December 19, 2020. On November 22, 2021, Swift announced an "Old Timey Version" of the track on Good Morning America, released on the same day as an Amazon Music exclusive. A behind-the-scenes video featuring the process of making the new version accompanied its release. The track was released to digital music platforms on November 23, 2022. A collection containing the original, new, and live versions was released digitally in November 2024.

Swift produced "Christmas Tree Farm" with Jimmy Napes, who provided background vocals and played piano. Gus Pirelli played Moog bass and recorded the track at London Lane Studios in the United Kingdom, assisted by Jamie McEvoy, Joseph Wander, and Will Purton. Serban Ghenea provided audio mixing, with John Hanes serving as the mixing engineer. Simon Hale conducted the string arrangement and Lawrence Johnson worked as the vocal arranger. Musicians who played instruments for "Christmas Tree Farm" include Bruce White (viola), Jodi Milliner (bass guitar), Ian Burdge (cello), Chris Laurence (double bass), and Ash Soan (drums); John Thurgood, Laurence Davies, and Martin Owen played French horn. Several singers provided choral background vocals, including Candice-Mimi Otohwo, Destinee Knight-Scott, Glenn Tatenda Gwazai, Jessica Mae Obioha, Lorrain Briscoe, Margeaux Michelle, Paul Lee, Tarna Renae Johnson, Tehillah Daniel, The LJ Singers, Travis J Cole, Wayne Hernandez, and Wendi Rose.

"Christmas Tree Farm" is 3 minutes and 47 seconds long. It is a Christmas-themed pop song and a sentimental ballad that features an upbeat arrangement, an uptempo rhythm, and 1960s music influences. It begins with a jazzy intro showcasing 1950s-inspired strings, which was compared to the music of Nat King Cole and Karen Carpenter by The A.V. Club's Gwen Ihnat. The song then transitions into the main upbeat pop part that features jingle bell percussion; critics stated that it evoked the music of Mariah Carey and Phil Spector. Parade's Jessica Sager likened the composition of "Christmas Tree Farm" to music on Spector's album A Christmas Gift for You from Phil Spector (1963). Ihnat and NME's Hannah Mylrea considered the track a return to Swift's country music roots. Featuring a new arrangement and a 70-piece orchestra, the "Old Timey Version" incorporates horns, strings, and muted jingle bells along with elements of swing music.