Leonard L. Boswell (January 10, 1934 – August 17, 2018) was an American politician. He was the U.S. Representative for Iowa's 3rd congressional district from 1997 to 2013. Boswell was a member of the Democratic Party.

Boswell lost reelection in 2012, by 4th district incumbent Tom Latham, who decided to run against him after redistricting. Boswell left Congress in January 2013.

Boswell was born in Harrison County, Missouri. He studied at Graceland College. Boswell died at a hospital in Des Moines, Iowa from complications of gastrointestinal cancer on August 17, 2018, aged 84.^[1]

• Re—Elect Boswell U.S. Congressman Archived 2018-10-13 at the Wayback Machine official campaign site
• Biography at the Biographical Directory of the United States Congress
• Voting record maintained by The Washington Post
• Biography, voting record, and interest group ratings at Vote Smart
• Campaign finance reports and data at the Federal Election Commission

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