Jacob Haight Morrison, IV (March 12, 1905 – December 4, 1974), was an attorney, journalist, author, and historical preservationist from New Orleans, Louisiana. He helped preserve the Vieux Carré or French Quarter, which has been designated as a National Historic District, and published a pioneer textbook on historic preservation law.He was born into a political family: his father was district attorney of Pointe Coupee Parish, and his half-brother deLesseps Story "Chep" Morrison, Sr.