Warren's population was as of 2000 one of the oldest among large cities in the United States. 16.1% of Warren's population was 65 or older at the last census, tied for fifth with Hollywood, Florida among cities with 100,000+ population, and in fact the highest-ranking city by this measure outside of Florida or Hawaii. Warren is ranked 1st in the nation for longevity of residence. Residents of Warren on average have lived in that community 35.5 years, compared to the national average of eight years for communities of 100,000+ population. Warren remains a population center for people of Polish, Lebanese, Ukrainian, Albanian, Scots-Irish, Filipino, Maltese and Assyrian/Chaldean descent.