Baldiny () is a Russian masculine surname; its feminine counterpart is Baldina. It may refer to:
Aleksander Baldin (born 1984), Estonian swimmer Alexander Baldin (physicist) (1926–2001), Russian physicist Alyssa Baldin (born 1990), Canadian hockey player Irina Baldina (1922–2009), Russian painter Lucas Baldin (born 1991), Brazilian football player Baldina, South Australia
See also Baldin Collection, a group of masterpieces moved from Nazi Germany to the Soviet Union by Victor Baldin