The Old Guard (French Vieille Garde) were the elite veteran elements of the Emperor Napoleon's Imperial Guard. As such it was the most prestigious formation in Napoleon's Grande Armée. French soldiers often referred to Napoleon's Imperial Guard as "the Immortals."

Old Guard generally refers to a veteran or group of veterans, a conservative faction, or an older segment of a population. More specifically, the term may refer to:

• Old Guard, units of the French Imperial Guard under Napoleon Bonaparte
• Old Guard, the Southern high society in the Reconstruction era of the United States, especially in major cities like Charleston and Atlanta
• Old Guard, a segment of the leather subculture
• Old Guard (Australia), a right wing organisation of the 1920s and 1930s
• Old Guard (Atlanta), a division of the Gate City Guard of Atlanta, Georgia, United States
• Old Guard (New York), a ceremonial battalion of New York City infantry veterans, founded 1826
• Old Guard (Philadelphia), a ceremonial battalion in Philadelphia, Pennsylvania
• Old Guards (Russia), the collective term for military units serving as personal guards of the Emperor of Russia
• Bolshevik old guard
• Old Guard faction, an organized grouping in the Socialist Party of America in the early 1930s, which left in 1936 to establish the Social Democratic Federation
• The Old Guard, an American magazine published from 1863 to 1867
• Nickname of the 3rd U.S. Infantry Regiment and its
  • Old Guard Fife and Drum Corps
• The Old Guard (film), a 1934 Italian film directed by Alessandro Blasetti