This is somewhat of a trick question. The answer could be "one" or "two" depending on the coin's date.
The portrait on the front of the cent is essentially the same one that's appeared since the coin was first made in 1909. However .... all Lincoln Memorial cents (1959-2008) have a tiny image of Lincoln's statue inside the Lincoln Memorial on the reverse side, and two of the four 2009 commemorative cents also have images of Lincoln on the reverse.
Abraham Lincoln is the only president to appear on the US cent (a/k/a penny)
Assuming you are asking about a current US Lincoln cent, then the images on the reverse are: 1909-1958: The words ONE CENT between two wheat ears 1959-2008: The Lincoln Memorial 2009: Various images from Lincoln's life 2010-: The Union Shield President Abraham Lincoln is on the front. The original design was created by Victor D. Brenner.
The Lincoln cent entered circulation in August, 1909.
Abraham Lincoln, the 16th president of the US.
The Indian Head cents were replaced by Lincoln cents in 1909.
Abe Lincoln!
Abraham Lincoln
Lincoln was placed on the US cent in 1909 to commemorate his 100th birthday.
Abraham Lincoln's likeness is on the 5$ bill and the penny (1 cent).
A 1997 US one cent piece? is a Lincoln cent and only face value.
The U.S. Mint has never issued a 4 cent coin.
Kennedy is on the US half dollar (50 cent) coin and Lincoln is on the penny (1 cent) coin.