Tamar Jacoby (born 1954) is known primarily for her writing on immigration-related issues.

A native of New York City, Ms. Jacoby graduated from Yale University in 1976, after which she became a staffer on the New York Review of Books. From 1981 to 1987 she served as a deputy editor of the op-ed page of The New York Times, and from 1987 to 1989 as a senior writer and justice editor at Newsweek. She has also been assistant to the editor at the New York Review of Books.

Her writing with regard to race relations and immigration has been published in numerous publications, including Commentary, Dissent, The Nation, The New Republic, The Washington Post, the Los Angeles Times, and the New York Times Book Review, among other journals of political thought and newspapers of national or regional scope.