The above map shows the distribution of officially designated National Historical sites by Florida county. Not surprisingly, Miami-Dade which has been home to Florida’s most metropolitan city for a hundred years has by far the most with 172. However, somewhat surprisingly Volusia County has the second most designated sites with 101 and Sarasota is third with 91. Other counties with over 60 designated National Historical sites are Duval, Hillsborough, Polk, Leon, Pinellas and Palm Beach.
Looking for the large county with the LEAST history in Florida? If you use a proportional scale it would be Broward with over 1.8 million residents and 1,200 square miles yet only 31 national historical sites. To put this in perspective, the city of Miami (less than 1/5th of Miami-Dade County’s population) has more than TWICE as many national historical sites than all of neighboring Broward County. In fact the City of Miami has more national historical sites than all but five counties. Per capita Orange County also lags behind the other metropolitan counties (save Broward of course) but that is understandable considering Central Florida’s explosive growth has been more recent than that of the other large metro areas in the state.
The counties with the most per capita historical sites? Probably St Johns and Monroe for obvious reasons- St Augustine and Key West respectively. The only country without a national historical site? Lafayette (though the map indicates Gilchrist has zero national historical sites as well, but TFS can report that the Cannon Farm just outside of Bell was just designated as a historical site late in 2013).