Since 1900, a majority of Indiana counties have grown by less than 0.4% per year.  These 47 rural counties have been trapped in a time machine, slowly evolving from 20,000 to 24,000 people per county.  In 1900, they accounted for 38% of the population.  This dropped to 23% in 1950 and 17% in 2010.  These counties account for half of the counties and land, but only one-sixth of the population.  The urbanization of Indiana continues slowly, decade after decade.  The 47 rural counties had a population of 960,000 in 1900 when William McKinley of Ohio was elected president and only 1,120,000 in 2010.

 On the other hand, the urban counties have more than tripled in population (+241%), increasing from 1.6 to 5.3 million.  Indiana has grown by 155%, from 2.5 to 6.4M people.  Fully 96% of this growth has taken place in the 45 urban counties.

 The ten medium-sized cities and their immediate counties increased by two-thirds between 1900 and 1950 and then by one-sixth through 2010.  They accounted for 460,000 people in 1900, increased to 760,000 in 1950 and maintained minor growth to 870,000 in 2010.  Evansville, Anderson, Muncie, Terre Haute, Kokomo, Marion, Richmond, Bedford, New Castle, and Huntington grew from counties with 30-70,000 residents in 1900 to counties with 40-170,000 citizens across the century.

 The five largest cities – Indianapolis, Fort Wayne, Gary and South Bend/Elkhart – grew significantly faster.  They increased from about 0.4 million in 1910 to 1.4 million in 1950 to 2.2 million in 2010.  The rapid growth from 1900 to 1950 has since tapered off.  These 5 areas have grown from one-sixth of the state’s population to slightly more than one-third.  

 The greatest changes have taken place in the suburbs.  Fully 28 counties plus Lafayette and Bloomington have benefited from the growth of metropolitan areas.  These 30 counties have grown from a 1900 average population of 23,000 (abut the same as the rural counties) and total of 680,000 to 860,000 in 1950 (up 26%) to 1,950,000 (up a stunning 186%) in 2000 and an even higher level of 2,250,000 in 2010.  The suburban counties have increased from 27% to 35% of the Indiana population.

 Indiana’s population growth is expected to drop back to 6% for the 2010 decade after a 10% increase in 2000, 1% in 1990 and 6% in 1980.  This follows a post-war period where 15% growth per decade was the norm.  This decade continues to show very unequal growth.  The 30 suburban counties show a 14% growth of 305,000 people.  The other 62 counties increased by only 1%, from 4.1 to 4.2 million people.  The 30 suburban counties have 88% of the population growth. 

 Indiana has been blessed to have 6 urban areas that drive significant population growth: Chicago/Gary, South Bend/Elkhart, Ft. Wayne, Indianapolis, Cincinnati and Louisville.  The state legislature would be wise to adopt policies that reinforce this century long trend.