Home prices rose in 91 US cities in the first quarter as states hard hit by foreclosures began to recover and a tax credit cut the number of properties for sale.

The median price of a single-family home sold in Saginaw, Michigan, doubled to $60,800, the Chicago-based National Association of Realtors said in a report today. Prices in Akron, Ohio, climbed 90% to $95,300 and Grand Rapids, Michigan, recorded a 26% increase to $90,700. Nationally, the median declined 0.7%.

Cities that led the nation in foreclosures a year earlier had the biggest price increases as a tax credit of as much as $8,000 boosted demand and drove the supply of unsold homes to a four-year low in January, according to Lawrence Yun, chief economist for the Realtors’ group. Brian Bethune, chief US financial economist for IHS Global Insight, said an improving job market should sustain the fledgling rebound in real estate.