"This Town Ain't Big Enough for Both of Us" is a song by American pop band Sparks. Written by Ron Mael, it is the opening track on their third studio album Kimono My House (1974), and was the lead single from the album. Although it did not chart on the Billboard Hot 100, "This Town Ain't Big Enough for Both of Us" achieved major success in Europe, peaking within the top ten of the charts in the Netherlands, Switzerland and the United Kingdom. In the latter country, the song peaked at number two on the UK Singles Chart, where it remained for two consecutive weeks. The song has become the highest-charting for Sparks on the UK Singles Chart, held off from the top spot by The Rubettes' bubblegum pop song "Sugar Baby Love".

Sparks is an American pop and rock duo formed by brothers Ron (keyboards) and Russell Mael (vocals) in Los Angeles. The duo is noted for their quirky approach to songwriting; their music is often accompanied by sophisticated and acerbic lyrics—often about women, and sometimes containing literary or cinematic references—and an idiosyncratic, theatrical stage presence, typified by the contrast between Russell's animated, hyperactive frontman antics and Ron's deadpan scowling. Russell Mael has a distinctive wide-ranging voice, while Ron Mael plays keyboards in an intricate and rhythmic style. Their frequently changing styles and visual presentations have kept the band at the forefront of modern, artful pop music.