The aim of this study was to determine the growth performance and survival rates in Romanov lambs (n=57) reared under a semi-intensive management system in Siirt province of Turkey. The live weights (LWs) of the lambs at birth and on days 30, 60, 90, 120, 150 and 180 were determined to be 3.09, 7.57, 15.75, 22.06, 26.79, 29.53 and 31.45 kg, respectively. The average daily live weight gains (ADGs) from birth to the 60th day, from the 61st to 90th days, from the 91st to 180th days, and during the overall period (from birth to 180 days) were 213.18, 205.91, 104.01 and 158.02 g, respectively. The survival rates of the lambs on the 60th, 90th and 180th day were 85.96, 82.46 and 80.70%, respectively. The dams age (except for during 61-90th days for ADG), sex (except for ADG during 91-180th days), and birth type (only birth weight, LW on 30th day and ADG during 1-180th days) were significant effect on the LWs and ADGs of the lambs (P<0.05); however, the effect of the weaning times was not significant on LWs and ADGs (except for during 61-90th days) (P>0.05), furthermore, the effect of birth type was significant on the survival rate on 180th day among all periods (P<0.05). Consequently, Romanov lambs may be weaned on the 60th day of age; early weaning management will facilitate lambing three times in 2 years in order to obtain more lambs, in addition to increasing the amount of milk obtained for commercial purposes.