John G. Heimann (April 1, 1929 – January 31, 2024) was an American government official who was Comptroller of the Currency from 1977 to 1981, having been appointed by President Jimmy Carter and confirmed by the Senate.

Prior to this role he was the New York State Superintendent of Banking and subsequently Commissioner of Housing and Community Development.

He was an active participant in the reform effort that lifted the limits on, and differentials between, the interest rates that different types of financial institutions could pay to attract deposits.

[2] His career in the private sector includes: a founding partner of Warburg Pincus; Co-chairman of Warburg Paribas Becker; and Chairman of the Global Financial Institutions Group of Merrill Lynch and chairman, Merrill Lynch Europe, Middle East and Africa.

In the past Heimann served as co-chairman of the 2020 Andean Committee, Council on Foreign Relations; and was the Founding Chairman of the Financial Stability Institute of the Bank for International Settlements.