Edward Dean Adams (April 9, 1846 – May 20, 1931) was an American businessman, banker, power broker and numismatist.
He was the president of Niagara Falls Hydraulic Power and Manufacturing Company which built the first hydroelectric power plants in Niagara Falls, New York City.
The Adams Power Plant Transformer House is named after him.
He was "conspicuously successful in corporate reorganizations".
Adams appeared on the cover of TIME Magazine on May 27, 1929.He also had wide cultural interests, including numismatics.