Ralph Anthony "Iggy" Ignatowski (April 8, 1926 – March 7, 1945) was a United States Marine Corps private who was captured and killed by the Japanese in the Battle of Iwo Jima during World War II.

He was a member of the Marine rifle company platoon who climbed to the top of Mount Suribachi and raised the American flag on February 23, 1945.

He became a close friend with one of his platoon's Navy corpsmen, John "Doc" Bradley, who was with Ignatowski on the battlefield just before he was captured on Iwo Jima.

The following entries from the 28th Marine Regiment records describe the timeline of their deaths: Although the exact circumstances are uncertain, Ignatowski was taken prisoner of war by Japanese troops, tortured, killed, and mutilated.

[3] Ignatowski's remains were initially interred with military honors in Grave 1201, Row 11, Plot 5, 5th Marine Division Cemetery, Iwo Jima.