Geijer is a Swedish surname. People with this surname include:
Agnes Geijer (1898–1989), Swedish historian and archaeologistArne Geijer (1910–1979), trade unionistErik Gustaf Geijer (1783–1847), writer, composer, and historianEric Neville Geijer (1894–1941), herald and genealogistLennart Geijer (1909–1999), Minister for JusticeMona Geijer-Falkner (1887–1973), film actressReinhold Geijer (born 1953), bankerGeijer family, Swedish noble family of Austrian origin