Kestner is a German surname. Notable people with the surname include:
(Georg Christian) August Kestner (1777, Hanover - 1853), German antiquarian and diplomat
Kestner-Museum, Hanover, Germany, founded in 1889
kestnergesellschaft, an art gallery in Hanover, Germany, founded in 1916
Boyd Kestner (born 1964), American actor
Charles Kestner (1803 - 1870), German-French chemist and politician
Charlotte Kestner, née Buff (1753 - 1828), wife of Johann Christian Kestner
Hermann Kestner (1810 - 1890), German composer
Johann Christian Kestner (1741 - 1800), German jurist and archivust
Lars Kestner, American author of financial texts
Paul Kestner, founded the Kestner company in 1902, now part of the GEA Group
