List of Billboard Hot 100 number ones of 1965

The Billboard Hot 100 is a chart published since August 1958 by Billboard magazine which ranks the best-performing singles in the United States.^[1] In 1965, it was compiled based on a combination of sales and airplay data sourced from surveys of retail outlets and playlists submitted by radio stations respectively,^[1] and 26 different singles spent time at number one.

In the issue of Billboard dated January 2, the Beatles were at number one with "I Feel Fine", retaining the position from the previous week.^[2] Having released their first single in 1962,^[3] the British band had experienced a dramatic surge in popularity, dubbed "Beatlemania", in their native country in 1963.^[4] Capitol Records, the label which held the rights to their singles in the United States, initially declined to release them, however,^[5] deeming them unsuitable for the U.S. market.^[6] The band finally made their Hot 100 debut in January 1964, and by the end of the year, had achieved six number ones.^[7] After spending the first two weeks of 1965 in the top spot with "I Feel Fine", the Beatles returned to number one later in the year with "Eight Days a Week", "Ticket to Ride", "Help!" and "Yesterday", taking their total number of chart-toppers to ten within two years.^[8] Their total of 12 weeks at number one in 1965 was double that achieved by any other act.

Fourteen acts topped the Hot 100 for the first time in 1965. The success of the Beatles had triggered what was dubbed the British Invasion of the U.S. music scene,^[9] and six of the first-time chart-toppers were acts from the U.K.: Petula Clark, Freddie and the Dreamers, Wayne Fontana and the Mindbenders, Herman's Hermits, the Rolling Stones and the Dave Clark Five.^[10] The Righteous Brothers, Gary Lewis & the Playboys, the Temptations, the Four Tops, the Byrds, Sonny & Cher, the McCoys and Barry McGuire also reached number one for the first time in 1965.^[11] Herman's Hermits achieved two number ones during the year, but unusually neither single was released in their native U.K.^[12] The Rolling Stones also had two chart-toppers, the first of which, "(I Can't Get No) Satisfaction", tied with "Yesterday" for the year's longest-running number one, both singles spending four weeks atop the listing.^[8] In addition to the three British acts, the Supremes and the Byrds achieved multiple number ones during 1965. When the Supremes gained their third chart-topper of the year in June with "Back in My Arms Again", they became the first act to reach number one with five consecutive Hot 100 entries.^[13] The Dave Clark Five had the year's final number one with "Over and Over", which gave the group its sole week at number one on the Hot 100.^[14] Some of 1965's number ones have been considered among the greatest pop songs ever recorded. In 2004, Rolling Stone magazine ranked "(I Can't Get No) Satisfaction" at number 2 on its list of the 500 greatest songs of all time and "Yesterday" and "Help!" were also included in the top 30.^[15]