Teton County no longer ranks first among U.S. counties for average adjusted gross income, according to a Syracuse University website that tracks IRS data.
In 2008 and 2009, the county was ranked No. 1 in the nation, but in 2010 it fell to 40th.
The average adjusted gross income dropped from $142,000 in 2008 to $120,000 in 2009. By 2010, the latest data available, income had fallen to $80,800, a precipitous 43 percent decline.