"Work Song" is a song recorded by Irish singer-songwriter Hozier for his 2014 eponymous debut studio album. It was released on 16 March 2015 as the fifth single from the record, appearing on the Irish Singles Chart and Billboard Hot Rock & Alternative Songs chart.^[1] An accompanying music video was released in March 2015.

On 5 March 2015, Hozier played the song on The Tonight Show Starring Jimmy Fallon.^[2][3] The song impacted United States Rock Radio on 16 March 2015.^[1] "Work Song" was featured in the trailer for George Tillman Jr.'s 2015 film adaptation of The Longest Ride, a novel by Nicholas Sparks^{[citation needed]} as well an episode of NBC's occult drama Constantine.^{[citation needed]}

"Work Song" is a gospel-blues song listed as the ninth track on the album, written by Hozier.^[4] Hozier cites the song as one of his favorites from the record.^[5] "Work Song" has "nuances of soul" with a "strong melodic bass", composed of percussion, tambourines, guitar, and "murmurous" vocals, while the lyrics describe a love of "undying sweetness" and devotion.^[5][6][7] The song possesses gospel backing vocals and church-like hand-claps, with literary themes of love, sin, and religion returning to the record.^[8]

"Work Song" received acclaim from critics; The Arts Desk described it as an "elegiac spiritual head-nodder" that Hozier sings through with "easy familiarity", while The Irish Times described it as "mental-good", establishing him as "far from the boilerplate soul/blues of today".^[9][10] It is often cited as one of the strongest tracks on Hozier.^[10][11]

The song peaked at number 15 on Billboard Hot Rock & Alternative Songs, spending twelve weeks on the chart and appeared within the top twenty on the Bubbling Under Hot 100 and Adult Alternative Songs charts, respectively.^[12]

The official music video for "Work Song" was released on 23 March 2015.^[13] Hozier shot the video the day after the Grammy Awards, and reportedly woke up with an "outrageous hangover" during the shoot.^[14] The video features him performing for a crowd, where the audience begins to break out into synchronized, slow, dancing, that "verges on performance art", embodying the romantic lyrics of the track.^[13] The video has amassed over 79 million views on YouTube.^[15]