Leofstan (also Ealhstan or Elstanus; died between 909 and 926) was a medieval Bishop of London.

Leofstan was consecrated between 909 and 926. He died between 909 and 926.^[1]

• Fryde, E. B.; Greenway, D. E.; Porter, S.; Roy, I. (1996). Handbook of British Chronology (Third revised ed.). Cambridge: Cambridge University Press. ISBN 0-521-56350-X.

• Ealhstan 15 at Prosopography of Anglo-Saxon England