Some experts say Detroit's population will decline more over the next decade before possibly climbing back up.
Another 100,000 to 200,000 people could leave the financially troubled city, which lost a quarter of its population between 2000 and 2010.
The latest census says Detroit has about 713,777 residents -- down from 951,000 a decade ago. It was a city of 1.8 million in 1950.
Michigan-based financial consultant James McTevia says poor public schools, a collapsing infrastructure and high unemployment may prompt another 200,000 residents to flee.
Demographer Kurt Metzger sees it bottoming out at about 650,000, but growing to 850,000 to 900,000 in a decade or more if revival efforts are successful.
Mayor Dave Bing says a smaller Detroit still can be vibrant and meet the needs of its residents.