Hatoyama (written: 鳩山 lit "dove mountain") is a Japanese surname. Notable people with the surname include:
The Hatoyama family is a prominent political family. Members include:
Kazuo Hatoyama (1856–1911), Vice-Foreign Minister, Diet of Japan, University of Tokyo professor, principal of Waseda University, father of Ichirō Hatoyama and great-grandfather of Yukio Hatoyama and Kunio Hatoyama
Haruko Hatoyama, co-founder of Kyoritsu Women's University; mother of Ichirō Hatoyama and great-grandmother of Yukio and Kunio Hatoyama
Ichirō Hatoyama (1883–1959), Secretary of the Cabinet, Minister of Education, and Prime Minister of Japan
Kaoru Hatoyama, schoolmaster of Kyoritsu Women's University; wife of Ichirō, mother of Iichirō
Iichirō Hatoyama (1918–1993), Foreign Minister of Japan, eldest son of Ichirō Hatoyama and father of Yukio Hatoyama and Kunio Hatayama
Yasuko Hatoyama (1922–2013), wife of Iichirō, mother of Kazuko, Yukio and Kunio
Yukio Hatoyama, former Prime Minister of Japan, former leader of the Democratic Party of Japan, grandson of Ichirō Hatoyama, son of Iichirō Hatoyama and older brother of Kunio
Kunio Hatoyama (1948–2016), former Minister of Internal Affairs and Communications, Minister of Education, Labour, and Justice; grandson of Ichiro Hatoyama, son of Iichirō Hatoyama and younger brother of Yukio
