Eisenhower was the 34th president, so the answer is 33.
The answer is actually 32 because Grover Cleveland served two nonconsecutive terms.
There were 33 presidents before Eisenhower.
Eisenhower is the 34th President of the United States, therefore there was 33 Presidents who served before him.
Harry S Truman immediately preceded Eisenhower.
Five have been shot, four died, one lived.
Before Dwight Eisenhower was a president his occupation was a 5 star General.
Learn about U.S. President Eisenhower
The History of Gambling Presidents
President Eisenhower Secretly Met with Aliens?
Jim Newton on Dwight Eisenhower's Underrated Presidency