This study was conducted to investigate the reproductive status in Jeju native cattle. Total 800 cows from 10 districts and 2 government faciities in 4 main area of Jeju-do were employed in this study. The results obtained regionally were summarized as follows; 1. The occurrence of the age at first estrus was average 26.3 months, but, regional differences in the first estrus were observed shortest in southern area (20.6 months) and the longest in eastern area (28.3 months). 2. The age of first insemination averaged 30.2 months but showed a few regional differences as that of sexual maturity. 3. The length of estrus cycle and gestation period of cows were average 21.0 and 284.3 nays respectively and no regional differences were found to except for calving interval;420 days south area) 444.8 days (north area.) 447.7 days (west area) and 453.2 days (east area), respectively. 4. The average age at first calving was 1127 days and those of cows in south and west area showed one month earlier than that of east and north area. 5. The first estrus after calving appeared on 70.7 days in south area and 77.3 days in northern area. Longest period was observed in as tern region and government fecilit.