Alexander del Mar (aka Alexander Del Mar and Alexander Delmar; August 9, 1836 – July 1, 1926) was an American political economist, historian, numismatist and author. He was the first Director of the Bureau of Statistics at the U.S. Treasury Department from 1866–69. Del Mar was a rigorous historian who made important contributions to the history of money. During the mid-1890s, he was distinctly hostile to a central monetary role for gold as commodity money, championing the cause of silver and its re-monetization as a prerogative of the state.