Only one U.S. president was born in Illinois: Ronald Reagan. He was born in Tampico, Illinois, on February 6, 1911. Although Reagan is the only president born in Illinois, another president, Barack Obama, is closely associated with the state. Obama was not born in Illinois but represented the state in the U.S. Senate and launched his presidential campaign from there.
So, while only one president was born in Illinois, the state has played a significant role in the lives and careers of two U.S. presidents.