The present Republic of Yemen (RDY) was formed in 1991 with the union of two Yemens namely, Yemen Arab Republic (YAR) or North Yemen and the Peoples Democratic Republic of Yemen (PDRY) or South Yemen. Studies on livestock breeds were undertaken in the former YAR during 1985–87 under the FAO Project UTFN/YEM/011. It was supplemented with a rapid survey for the former PDRY in 1991 by the senior author (HUH) under the FAO Project UTF/ PDY/013. The information on goats in Yemen has recently been published in FAO Animal Genetic Resources Information No: 8 (1992). Here is presented the information of the Yemeni sheep and cattle population.