Secret Treaties is the third studio album by American rock band Blue Öyster Cult, released on April 5, 1974 by Columbia. It features the same band members and production team as their previous album.

The album spent 14 weeks in the US album charts, peaking at No. 53. It was certified gold by the RIAA in 1992.

In 1975, a poll of readers of the British magazine Melody Maker voted Secret Treaties the "Top Rock Album of All Time". In 2010, Rhapsody called it one of the all-time best "proto-metal" albums.

It is the only BÖC album that does not feature a track with lead vocals sung by guitarist Donald "Buck Dharma" Roeser. The band also did not write any of the lyrics to the album, handing that duty to producer Sandy Pearlman, rock critic Richard Meltzer and singer Patti Smith.