William Lawrence Shirer (February 23, 1904 – December 28, 1993) was an American journalist and historian. He became known for his broadcasts on CBS from the German capital of Berlin through the first year of World War II.

Shirer first became famous through his account of those years in his Berlin Diary (published in 1941), but his greatest achievement was his 1960 book, The Rise and Fall of the Third Reich, originally published by Simon & Schuster. This book of well over 1000 pages is still in print, and is a detailed examination of the Third Reich filled with historical information from German archives captured at the end of the war, along with impressions Shirer gained during his days as a correspondent in Berlin. Later, in 1969, his work The Collapse of the Third Republic drew on his experience spent living and working in France from 1925 to 1933. This work is filled with historical information about the Battle of France from the secret orders and reports of the French High Command and of the commanding generals of the field. Shirer also used the memoirs, journals, and diaries of the prominent British, Italian, Spanish, and French figures in government, Parliament, the Army, and diplomacy.

Born in Chicago in 1904, Shirer attended Washington High School and Coe College in Cedar Rapids, Iowa. He graduated from Coe in 1925. Working his way to Europe on a cattle boat, intending to spend the summer there, he remained in Europe for the next fifteen years.