The wealthiest 1 percent of U.S. households had an average income of $1,153,298 in 2013 compared to $45,567 for the other 99 percent, according to a recent analysis by the Economic Policy Institute.
Zoom in and rollover/tap any county on this map for details behind the average income of the top 1% in 2013.
The top 1 percent of earners in the United States had an average income of $1,153,298 in 2013 compared to an average of $45,567 for the other 99 percent, according to a recent analysis by the Economic Policy Institute.
The minimum income to be in the top 1 percent was $389,436, the EPI study said.
EPI is a left-leaning, Washington D.C.-based think tank that studies economic issues impacting low- and middle-income families. For this study, EPI used 2013 data from the Internal Revenue Service.
Below are some highlights of the EPI analysis.
1. The Northeast is the wealthiest region of the county.
The top 1 percent of the Northeast have a 2013 average income of $1,564,388 compared to $1,188,400 in the West, $988,670 in the South and $914,240 in the Midwest.
For the other 99 percent, the average income was $49,108 in the Northeast, $47,396 in the West, $45,593 in the Midwest and $43,421 in the South.
2. The minimum income of the top 0.01 percent was $16,869,759 in 2013.
The average income for the top 0.01 percent -- i.e, the top 1 percent of the top 1 percent -- was $26,106,656 in 2013.
Connecticut ranked first among the 50 states in this category, followed by New Jersey and Massachusetts. The bottom three were West Virginia, Arkansas and New Mexico.
3. The country's most affluent county is in Wyoming.
The top 1 percent had an average income of $28.2 million in Teton County, Wy., which includes the upscale ski resort town of Jackson Hole.
The county has a population of a little over 22,000. The average income for the other 99 percent is $120,884.
Ranked No. 2 is New York County -- i.e., Manhattan -- where the 1 percent have an average income of $8.1 million, and No. 3 is the Fairfield County in Connecticut, with an average income of $6.1 million for the top 1 percent.
4. Georgia has three of the bottom five counties when ranking by average salary of the top 1 percent.
The lowest ranked of 3,065 U.S. counties is Quitman County in Georgia, where the average income of the top 1 percent is $127,425.
Also in the bottom five: The Georgia counties of Chattahoochee and Taliaferro, plus Wade Hampton County in Arkansas and Robertson County in Kentucky.
5. North Dakota has three of the top five U.S. counties when ranking by average income of the other 99 percent.
An oil and gas boom paired with a sparse population has driven up average salaries in western North Dakota.
The top five counties and their average salary for the other 99 percent: McKenzie County, N.D. ($141,110), Williams, ND ($122,496), Teton, WY ($120,884), Loudoun, VA ($112,602) and Mountrail, N.D. ($111,009).
Loudon includes affluent suburbs in the Washington D.C. metro area.
The bottom five counties and their average salary for the other 99 percent: La Paz, AZ ($13,291), Telfair, GA ($14,711), Saguache, CO ($15,666), McCreary, KY ($16,190) and Dixie, FL ($16,319).
6. U.S. households in the top 1 percent earned, on average, 25 percent times the average income of households in the other 99 percent.
The ratio was the lowest in the Midwest, at 20 to 1, and highest in the Northwest, where the wealthiest 1 percent had 32 times the average income of the other 99 percent.
The ratio was 22 to 1 in the South and 25 to 1 in the West.
7. The top 1 percent are seeing their income increase much faster than the other 99 percent in recent decades.
The top 1 percent of Americans received 59 percent of the nation's overall income growth during economic expansions since 1980, according to EPI's calculations.
By comparison, the bottom 99 percent got 90.5 percent of the overall income growth during economic expansions between 1949 and 1979.
In 1928, just before the 1929 stock market crash, the top 1 percent accounted for 23.9 percent of the U.S. personal income income. That compares to 10 percent in 1979, 23.5 percent in 2007 and 20.1 percent in 2013.
Database: Look up income averages for all U.S. counties