William Dingley was an American politician known for his role as a member of the United States House of Representatives. He served from 1895 to 1903, representing the state of Maine. Dingley was a member of the Republican Party and played a significant role in legislative matters during his time in office. He is perhaps best known for the Dingley Tariff Act of 1897, which aimed to raise tariffs on imported goods to protect American industries. This legislation was a key part of his political legacy and reflected the economic policies of the era, focusing on promoting domestic production and trade.