David Cary Jacobson (born October 9, 1951) is an American lawyer who served as the 29th United States Ambassador to Canada.

A graduate of Johns Hopkins University and Georgetown University Law Center,[1][2] he spent much of his career working in the Chicago offices of Sonnenschein Nath & Rosenthal, a law firm.

[5] His credentials were accepted by Governor General Michaëlle Jean on October 2, 2009, and he took his post as ambassador.

[6] On May 21, 2013, Jacobson announced his departure from the Embassy after nearly four years as Ambassador to Canada, effective July 15.

[7] In October 2013, he became vice chairman of the Canadian-American BMO Financial Group.