James C. Lincoln, Jr. (born August 17, 1889, date of death unknown) was an American track and field athlete who competed in the 1920 Summer Olympics.
He was born in Saint Joseph, Missouri and died in Vancouver, Washington.
In 1920 he took part in the javelin throw competition. However, it is for what happened just before the competition that Lincoln is best remembered today. As the world record holder Jonni Myyrä was resting on the grass, his left (non-throwing) arm was struck near the elbow by a Lincoln warm-up throw. Myyrä went on to win the gold medal regardless, while Lincoln finished ninth.