Le Tellier or Letellier is a surname, and may refer to:
- Camille le Tellier de Louvois (1675-1718), French cleric
- Charles-Maurice Le Tellier (1642-1710), Archbishop of Reims
- François-Michel le Tellier, Marquis de Louvois (1641-1691)
- Hervé Le Tellier (1957 - ), French writer
- Louis Charles César Le Tellier, duc d'Estrées (1695-1771)
- Louis François Marie Le Tellier (1668-1701), French statesman
- Luc Letellier de St-Just *(1820-1881), Canadian politician
- L. S. LeTellier, football coach
- Michel le Tellier (1603-1685), French statesman