Myrdal is a surname. Notable people with the surname include:
Alva Myrdal (1902–1986), Swedish diplomat, politician and writer
Arne Myrdal (1935-2007), Norwegian anti-immigrant activist
Gunnar Myrdal (1898–1987), Swedish economist and politician
Jan Myrdal (1927–2020), Swedish author, leftist-political writer and columnist
Janne Myrdal (born 1962), Norwegian-American politician
Rosemarie Myrdal (1929–2023), North Dakota Republican Party politician