Kellgren is a surname. Notable people with the surname include:
Christer Kellgren (born 1958), Swedish ice hockey player Gary Kellgren (1939–1977), American audio engineer George Kellgren (born 1943), Swedish firearms designer Henry Kellgren (1886–1954), Swedish military officer Jessica Kellgren-Fozard (born 1989), English YouTuber Johan Henric Kellgren (1751–1795), Swedish poet and critic Jonas Kellgren (1911–2002), British physician Katherine Kellgren (1969–2018), American narrator