List of Famous people who died in 1951

Archibald Clark Kerr, 1st Baron Inverchapel,, known as Sir Archibald Clark Kerr between 1935 and 1946, was a British diplomat. He served as Ambassador to the Soviet Union between 1942 and 1946 and to the United States between 1946 and 1948.

Nikolaus “Nik” Welter was a Luxembourgish writer, playwright, poet, professor, literary critic, and statesman. He wrote predominantly in German. He also served as a Minister for Education in the government of Émile Reuter.

Katharine Martha Houghton Hepburn was a U.S. feminist social reformer and a leader of the suffrage movement in the United States. Hepburn served as president of the Connecticut Woman Suffrage Association before joining the National Woman's Party. Alongside Margaret Sanger, Hepburn co-founded the organization that would become Planned Parenthood. She was the mother and namesake of actress Katharine Hepburn and the grandmother and namesake of actress Katharine Houghton.

Horace Griggs Prall was a New Jersey attorney and Republican politician. He served for a number of years as a state legislator and a short term as Acting Governor of the state in 1935.

Dennis Joseph Dougherty was an American prelate of the Roman Catholic Church. He served as Archbishop of Philadelphia from 1918 until his death in 1951, and was created a cardinal in 1921.

Lady Mabel Florence Harriet Wentworth-Fitzwilliam was an English socialist politician, later known as Lady Mabel Smith.

Alfred Ernst Christian Alexander Hugenberg was an influential German businessman and politician. An important figure in nationalist politics in Germany for the first few decades of the twentieth century, Hugenberg became the country's leading media proprietor during the interwar period. As leader of the German National People's Party he was instrumental in helping Adolf Hitler become Chancellor of Germany and served in his first cabinet in 1933, hoping to control Hitler and use him as his "tool." Those plans backfired, and by the end of 1933 Hugenberg had been pushed to the sidelines. Although Hugenberg continued to serve as a "guest" member of the Reichstag until 1945, he wielded no political influence.

Richard Reinhard Emil Schorr, was a German astronomer.

Admiral Sir Max Kennedy Horton, was a British submariner during the First World War and commander-in-chief of the Western Approaches in the later half of the Second World War, responsible for British participation in the Battle of the Atlantic.

Karl Koller was a German General der Flieger and the Chief of the General Staff of Nazi Germany's Luftwaffe during World War II.