Prior to World War II, the median age at marriage for white men was later than that for African American men. Since World War II, African American men have, on average, married later than white men. A discrete-time hazard model using data from the National Survey of Families and Households was analyzed to explain this racial cross-over in men's timing of marriage. Dramatic increases in the educational attainment of African American parents and the large movement of African Americans out of the South brought about the racial cross-over in the timing of marriage. Increased enrollment in higher education among African American men also contributed to the racial cross-over in the timing of marriage. Although lack of full-time employment and military service delayed marriage, these factors did not contribute to the racial cross-over.