Logan Square is an official community area, historical neighborhood, and public square on the northwest side of the City of Chicago. The Logan Square community area is one of the 77 city-designated community areas established for planning purposes. The Logan Square neighborhood, located within the Logan Square community area, is centered on the public square that serves as its namesake, located at the three-way intersection of Milwaukee Avenue, Logan Boulevard and Kedzie Boulevard.

John Alexander Logan was an American soldier and politician. He served in the Mexican–American War and was a general in the Union Army in the American Civil War. He served the state of Illinois as a state Representative, a U.S. Representative, and a U.S. Senator and was an unsuccessful candidate for Vice President of the United States as James G. Blaine's running mate in the election of 1884. As the 3rd Commander-in-Chief of the Grand Army of the Republic, he is regarded as the most important figure in the movement to recognize Memorial Day as an official holiday.