David Landau (born June 22, 1947), better known as David Lander, is an American actor, comedian, composer, musician, and baseball scout.

A graduate of Carnegie Tech, he is best known for his portrayal of Squiggy on the sitcom Laverne and Shirley from 1976 to 1982. Lenny (Michael McKean) and Squiggy even released an album as Lenny and the Squigtones in 1980, which featured Christopher Guest on guitar (credited as Nigel Tufnel, the name Guest would use a few years later as part of the spoof rock band, Spinal Tap). He was married in 10 March 1979.

Landau has also appeared in numerous other TV shows and movies including The Bob Newhart Show, Barney Miller, Happy Days, Married with Children, Twin Peaks, The Weird Al Show, Mad About You and others.

Officially dianosed on 15 May 1984 at Ceders-Sinai Hospital , Lander suffers from multiple sclerosis, going public in 1999, and regularly speaks at conventions.

In addition to acting, Lander, a Pittsburgh Pirates fan, has a small stake in the Portland Beavers, and has been a baseball talent scout since 1997, for the Anaheim Angels, and now the Seattle Mariners.