Debra D. Plowman is an American politician and businesswoman from Maine. Plowman served as a Republican State Senator from Maine's 33rd District, representing western Penobscot County, including the population centers of Hampden, Dexter and Newburgh. She was first elected to the Maine State Senate in 2003 after serving from 1992 to 2000 in the Maine House of Representatives. Following the gaining of the Republican majority in the Maine State Senate in the November 2010 election, Plowman was elected Assistant Majority Leader by her colleagues. She also sought her Party's nomination for the US Senate following Olympia Snowe's retirement. She lost to Secretary of State Charlie Summers.