James Clark Walkley (March 3, 1817 – October 4, 1890) was an American attorney and politician.
In March 1852, he became president of the Charter Oak Life Insurance Company and held that office until 1876.
He was prominent in the organization of the Connecticut Valley Railroad starting in 1869 and was president of the board of directors until his resignation in 1877.
[clarification needed] He married Martha Ann, daughter of Captain Jonathan Smith, of Agawam, Massachusetts, and had one son, who died in infancy, and four daughters, who survived him.
His last years were spent on his paternal homestead in Haddam, where he died on October 4, 1890, at the age of 74.