Marcus Lawrence Ward (November 9, 1812 – April 25, 1884) was an American Republican Party politician, who served as the 21st Governor of New Jersey from 1866–1869, and represented the state in Congress for one term, from 1873-1875.

Republicans nominated Ward for Governor in 1862, but he lost to Democrat Joel Parker. Ward was nominated again in 1865 and was elected Governor of New Jersey, serving from 1866 to 1869. After a Democratic-controlled legislature had not passed the Thirteenth Amendment, Ward worked with the new Republican-controlled New Jersey Legislature to secure state passage of both the Thirteenth and the Fourteenth Amendment, with its Due Process and Equal Protection clauses. Ward was chosen as a delegate to the 1860 Republican National Convention and was the chairman of the Republican National Committee from 1866 to 1868.

Ward served a single term in the United States House of Representatives from the newly-created New Jersey's 6th congressional district, from 1873-1875.

He died in Newark, New Jersey, and was buried there in Mount Pleasant Cemetery.