Alan Philip Larson (born July 19, 1949) is a diplomat and a former United States Ambassador to the Organisation for Economic Co-operation and Development (OECD) in 1990–93.

[7] He then served as Principal Deputy Assistant Secretary of State for Economic and Business Affairs.

[7][3] In 1990-93, Larson was the United States Ambassador to the Organisation for Economic Co-operation and Development (OECD) in Paris, France.

[7] In 1999–2005, appointed by President Clinton, Larson served as US Undersecretary of State for Economic, Business, and Agricultural Affairs (the first career Foreign Service officer to hold this office; he was reappointed by President George W. Bush in 2001, becoming the only individual in this role to be supported by both Democratic and Republican administrations), OECD, as senior economic advisor to Secretary of State Colin Powell, with his responsibilities including the entire range of international economic policy.

[6][10] Larson currently serves as the Senior International Policy Advisor for Covington & Burling, a position he has held since 2005.

[8] In that capacity he advises clients on matters at the intersection of international business and public policy.