From the New York Times:

It may take $380,000 to be in the national 1 percent, but it takes $900,000 to be among the top 1 percent of earners in Stamford, Conn. Compared with that, the price of admission to the 1 percent in Clarksville, Tenn., is a bargain at $200,000. Of course, the cutoff is only one measure, and perhaps not the most telling one. The average income of the 1 percent, according to the Tax Policy Center, is $1.5 million, and the superrich — the 120,000 tax filers that make up the top tenth of this group — earned an estimated average of $6.8 million in 2011.

And:

Doctors are more likely than any other profession to be in the 1 percent — one in five is.

More here.