How many US Presidents have there been?

There have been 44 men who served as US President as of 2011. It is often said that President Barack Obama is the 44th President of the United States of America. However, President Obama is only the 43rd different person to serve as President of the United States. This is due to the fact that President Grover Cleveland served non-consecutive terms and so is usually counted as both the 22nd and the 24th President.