A nifty section of the Indiana Workforce Development website includes highlights of the Hoosier State's data by county. Each includes information on population, education, commuting, labor force, industry, income and firm size data. Surf on over and click away.
This Indianapolis Observer found out that "Marion County’s population estimate for 2006 was 865,504, up 0.6 percent from the 2000 Census total." And, "The average 2006 earnings for Marion County was $44,227 per year versus Indiana’s $36,411."
Well, OK, they need to work on their grammar a bit (aren't there any English majors in the Statehouse?), but their numbers are most informative!