Kristjánsson is a surname of Icelandic origin, meaning son of Kristján. In Icelandic names, the name is not strictly a surname, but a patronymic. The name refers to:
Albert Kristjansson (1877–1974), Canadian politician from Manitoba; provincial legislator 1920–22
Broddi Kristjansson (contemporary), Icelandic Olympic badminton player
Guðjón Arnar Kristjánsson (b. 1944), Icelandic politician; member of the Alþing since 1999
Jón Kristjánsson (b. 1920, unknown if still living), Icelandic Olympic cross-country skier
Jónas Kristjánsson (b. 1924), Icelandic scholar and novelist
Matthías Kristjánsson (b. 1924, unknown if still living), Icelandic Olympic cross-country skier
Sigurður Kári Kristjánsson (b. 1973), Icelandic politician; member of the Alþing since 2003
Snorri Hergill Kristjánsson (b. 1974), Icelandic author
