New Jersey and Florida account for almost half of the 50 U.S. counties whose housing markets are most vulnerable to the economic effects of the coronavirus, an Attom Data Solutions report said.
Attom ranked 483 counties across the country based on the percentage of housing units receiving a foreclosure notice in the fourth quarter, the number of underwater properties in each county and the percentage of local wages required to pay for major homeownership expenses.

Thirty-six of the top 50 most vulnerable counties had median home prices in the $160,000-to-$300,000 range, the report noted.
Of the 10 most vulnerable counties, six are in New Jersey, including Sussex at No. 1 and Warren at No. 2.
"It looks like the Northeast is more at risk than other areas," Todd Teta, Attom's chief product officer, said in a press release. "As we head into the spring home buying season, the next few months will reveal how severe the impact will be."
Among the New Jersey counties that would be most affected, five are in the New York metropolitan area: Bergen, Essex, Passaic, Middlesex and Union. However, of the four counties in New York that Attom considered to be most vulnerable, only Rockland was in proximity to New York City.
Michelle Bonat is the chief AI officer at AI Squared, with a history of leadership roles in AI and technology, including AI CTO at JPMorgan Chase and head of AI Innovation at Chase. She led global engineering and product initiatives at Oracle across 30 countries and founded a fintech startup. A patent holder and hands-on data scientist always experimenting with the next new innovation, Michelle also drove product leadership at three companies that were acquired including Ariba (acquired by SAP).
Rathi Murthy is the Chief Technology Officer at Varo Bank, the first nationally chartered all-digital consumer bank in the United States. In this role, she leads the company's end-to-end technology strategy, overseeing the design and development of secure, scalable, and AI-powered digital banking platforms. Her leadership is instrumental in advancing Varo's mission to build inclusive, accessible, and real-time financial solutions for millions of consumers.
A seasoned technology executive, Rathi brings over 25 years of experience leading innovation and digital transformation at some of the world's most recognized technology and financial services companies. Prior to joining Varo, she served as Chief Technology Officer and President of Expedia Product & Technology at Expedia Group, where she modernized the company's global travel infrastructure, integrating AI-driven personalization, modular architecture, and advanced cloud capabilities across its family of brands.
Earlier, she held executive leadership roles at Verizon Media and Gap Inc., where she led enterprise cloud migrations, e-commerce platform evolution, and large-scale product delivery initiatives across global markets.
Rathi also served as Senior Vice President and Chief Information Officer of Enterprise Growth at American Express, where she was responsible for the technology strategy and operations of the Serve platform and a suite of prepaid products including Bluebird.
Rathi's early career includes engineering leadership roles at eBay, Yahoo!, Sun Microsystems, and WebMD, where she consistently delivered improvements in platform stability, operational agility, and customer experience.
In addition to her executive work, Murthy is a board member at PagerDuty, Inc., a leader in digital operations management, and serves as an External Expert Advisor to the University of San Francisco's Board of Trustees Committee on Information Technology Strategy. She is also a regular speaker at industry events and leadership forums, offering thought leadership on topics such as fintech innovation, integrating AI, platform transformation, and executive technology leadership.
For New York City proper, all five boroughs were in the middle of the list: Staten Island was ranked 161, Queens was 271, Manhattan at 312, Brooklyn at 320 and the Bronx was 327.
Most of the Florida counties considered at risk are in the northern and central portions of the state. But Broward County, which includes Fort Lauderdale, is also on that list.
There were four counties in the metro Chicago area on the list were Kane, Lake, McHenry and Will in Illinois. Cook County, which includes Chicago proper, is ranked 53rd most vulnerable.
Meanwhile, the only California county on the 50 most vulnerable list is Shasta. Los Angeles County was No. 276. The Bay Area counties were also in the bottom half of the list.
At the other end of the spectrum, 10 of the counties where the housing market is least vulnerable to the coronavirus are in Texas. Seven are in Wisconsin and there are five in Colorado.
King County in Washington, where Seattle is located, was the 20th least vulnerable county according to Attom.