Aaron of Lincoln is an English Jewish financier (born at Lincoln, England, about 1125, died 1186).

He is believed to have been the wealthiest man in Norman England; it is estimated that his wealth exceeded that of the King.

He is first mentioned in the English pipe-roll of 1166 as creditor of King Henry II for sums amounting to £616 12s 8d in nine of the English counties.

He conducted his business through agents, and sometimes in conjunction with Isaac, fil Joce; by these methods building up what was practically a great banking association that spread throughout England.