Robert Todd Lincoln.

15. How many direct descendants of Abraham Lincoln are currently living?
A. 0
B. 1
C. 6
D. 11

A. 0. There are no direct descendants of Abraham Lincoln alive today. The only one of Lincoln’s sons to reach adulthood and have children of his own was Robert. Robert’s son Abraham had no children, and his daughters had three children between them, none of whom had children of their own. The last living descendant, Lincoln’s great-grandson Robert Lincoln Beckwith, died in 1985.