Kuster is a surname; notable people with this surname include::
Andrew Kuster (born 1969), American writer, composer, conductor; former husband of Kristin Kuster
Ann McLane Kuster (born 1956), United States attorney and politician
Anton Kuster (born 1923), Swiss sprint canoer
Bill Kuster (1930–2006), American television meteorologist
Brigitte Kuster (born 1959), French politician
Ernst Kuster (footballer) (1940–1982), German footballer
Georg Gottfried Küster (1695–1776), German historian
Judith Kuster, American speech-language pathologist
Kristin Kuster (born 1973), American composer; former spouse of Andrew Kuster
Selina Kuster (born 1991), Swiss footballer
