Preliminary figures show attendance at Illinois' more than 30 historic sites was down slightly in 2011 compared to the year before.
The Illinois Historic Preservation Agency says more than 1.9 million people visited sites last year including the Lincoln Log Cabin.
That's down from more than 2 million people in 2010. Two sites have yet to be counted.
Historic preservation spokesman David Blanchette says the recession and high gas prices may explain the lack of growth overall.
But he says the numbers varied "site by site" and that some sites saw more visitors last year.
The Abraham Lincoln Presidential Museum reported a drop. But Lincoln's New Salem, a reconstruction of the village where Lincoln spent his early adulthood, had an increase.