Timothy Franz Geithner born August 18, 1961 is an American economist and central banker who served as the 75th United States Secretary of the Treasury, under President Barack Obama, from 2009 to 2013. He was previously the president of the Federal Reserve Bank of New York from 2003 to 2009.

Geithner's position includes a large role in directing the Federal Government's spending on the Financial crisis of 2007–2008, including allocation of $350 billion of funds from the Troubled Asset Relief programme enacted during the previous administration. At the end of his first year in office, he continued to deal with multiple high visibility issues, including administration efforts to restructure the regulation of the nation's financial system, attempts to spur recovery of both the mortgage market and the automobile industry, demands for protectionism, President Obama's tax changes, and negotiations with foreign governments on approaches to worldwide financial issues.