Who Succeeded Abraham Lincoln as president

Andrew Johnson (1808-1875), the 17th U. S. president, assumed office after the assassination of Abraham Lincoln (1809-1865). Johnson, who served from 1865 to 1869, was the first American president to be impeached. A tailor before he entered politics, Johnson grew up poor and lacked a formal education.

The answer to your question is

Andrew Johnson

he became the 17th president of the US. After Abraham Lincoln was assassinated.