 However, as of 2010, this is no longer true.The county had been the least-populous county in the United States, with a 2010 census population of only 82 persons (an increase of 22.4% over the 2000 figure of 67 residents), but the 2015 estimate by the US Census Bureau places it as the second-least populous county in the US.With an average of only 0.0646 inhabitants/km2 (0.167/sq mi) as of 2015, the county is also the least-densely populated county outside of Alaska.