Abstract
This study aims to obtain an overview of the population structure of Hisar cattle and the potential for natural increase. The study was conducted in Sumbawa Regency, West Nusa Tenggara Province, Indonesia. Data were obtained from 65 respondents from Hisar cattle breeders. The research method used was a survey method with data collection through interviews with Hisar cattle breeders. The variables collected in this study were the number of mature males, mature females, young males, young females, male calves, and female calves, birth rates, mortality rates, and natural increase (NI). Data analysis used descriptive statistical analysis and presented as percentages. The results showed that the Natural Increase Value (NI) of Hisar cattle in Sumbawa Regency, West Nusa Tenggara Province, was 17.7%. The need for replacement cattle for females was 6.54%, while for males it was 3.20%. The availability of replacement cattle was 4.76% for males and 12.94% for females. Based on calculations according to age information, when the cow is 3 years old, 6.54% of female cattle and 3.20% of males are needed, so there is an excess availability of female cattle (6.40%) and male cattle (1.56%).