Bill Lordan (born May 22, 1947 in Minneapolis, Minnesota), is an American rock music drummer who has been in a number of bands, such as The Mystics, Gypsy, The Robin Trower Band and Sly & The Family Stone. He began playing in sixth grade when his teacher offered after-school lessons.

Lordan started his recording career with The Amazers, The Mystics, The Esquires and Gypsy, a progressive rock band from Minnesota, recording three albums with them from 1971 to 1973. He also recorded with Bobby Womack and Ike and Tina Turner. He then joined Sly & The Family Stone. By 1974, Sly & The Family Stone released the album Small Talk. Along with violinist Sid Page, The first drummer for Sly & The Family Stone was Greg Errico who was succeeded on the album Fresh by Andy Newmark. He and Page left in 1974 with drummer Jim Strassburg taking his place and violinist Vicki Blackwell taking Page's place.

In late 1974, Lordan joined Robin Trower's band debuting on the album For Earth Below. He stayed with Trower until 1981, his last recording during his stint being the B.L.T. album with Jack Bruce. In 1980 he endorsed The Zildjian Company and was included in the Zildjian Cymbal Set Up Book of famous drummers. He also endorsed Rogers and DW Drum Companies and Remo and Aquarian Companies. He played with the Darrell Mansfield Band, the Dave Steffen Band and The Chris Aaron Band before starting his own band, The Bill Lordan Experiment, in 2000.

Bill is married to Diana Olson, a freelance entertainment writer.