William Frederick "Bill" Rieflin (September 29, 1960 – March 24, 2020) was an American musician.
Rieflin came to prominence in the 1990s for his work mainly as a drummer with many notable groups (particularly in the industrial rock and industrial metal scenes) including Ministry, the Revolting Cocks, Lard, KMFDM, Pigface, Swans, Chris Connelly, and Nine Inch Nails. He worked regularly with R.E.M. following the retirement of Bill Berry in 1997. He was a member of King Crimson until his death in 2020.
