In 39th Place: 1792
Unique for being one of two unanimous elections (along with 1789). It also featured the first political race for an executive office: Adams versus Clinton for the office of VP (Adams won 77-50). It didn't have the newness of 1789, but it was still exciting any time the country got a chance to elect 'Father of our Country' Washington president.
Only election in which an elector voted for two persons from the same State. The 4 Kentucky electors voted for George Washington and Thomas Jefferson, both of Virginia. Even under the terms of the 12th Amendment, the constitutional impediment is for an elector casting both his votes for someone from the elector's State. Maybe the newly admitted Kentuckians wanted to emphasize that they were no longer part of Virginia.
While in 1789, Georgia's electors misinterpreted the Constitution and believed that they were two vote for two people
exactly one of which was not to be from Georgia.
Now, if that were the rule, presidential history would look a good bit different...