Mildred O'Neill (1914?-October 6, 2003) was the widow of former Speaker of the United States House of Representatives Tip O'Neill. She spent 52 years as the eyes and ears of her husband's political campaigns.
She remained at the family home in North Cambridge, Massachusetts, during her husband's first seven terms in the House.
She died of a heart attack on October 6, 2003. She was 89.