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.
Gail McGiffin is the Managing Director and Global Insurance Advisory Lead at EPAM, where she helps insurers deliver large-scale transformation programs focused on growth, efficiency and digital innovation. With over 35 years of experience in insurance leadership, she specializes in underwriting modernization, data-driven platforms and operational efficiencies.
Before joining EPAM, Ms. McGiffin was the Chief Information and Operations Officer and board member at Vantage Group Holdings Ltd., where she led technology and operations. She previously served as Global Insurance Underwriting Lead and Partner/Principal at EY, Chief Information Officer and a member of the board of directors at ProSight Specialty Insurance and Managing Partner at Accenture, where she established and led the Global Underwriting Practice. Ms. McGiffin began her career at Chubb, holding leadership roles in underwriting and product innovation.
Justin Grooms is the president of Bolt, a checkout technology company.
Brian Moore leads the North American operations for Sollers Consulting, he has more than 20 years of experience in insurance technology leading professional services teams.
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.