Lorentz Fisker may refer to:
Lorentz Henrik Fisker (1753–1819) Danish admiral and oceanographer, awardee of the Grand Cross of the Order of the Dannebrog Henrik Lorentz Fisker (1720–1797) Danish admiral (1684–1757), Danish (county officer) for Nysted and (county officer) for Copenhagen (1731–1779), Norwegian, county officer for Christiansand og Agdesidens