The present study aims to assess age at first service and calving, calving interval, open days, and number of service per conception of dairy cows under small holder in Siltie zone, Ethiopia. To do so, a total of one hundred eighty sample size was selected from three selected districts of Siltie zone purposively. Data were collected through interviews with household heads using a detailed and pre-tested questionnaire. All data collected from demographic information and management practices of dairy cows were analyzed using SPSS software, version 27.0 while all data obtained from reproduction performances of dairy cows were analyzed using SAS version 9.4 in the General Linear Model (GLM). In this investigation, we found that long age at first service (41.34±12.23, 37.561±85 and 30.87±8.65), for indigenous and (31.12±10.23, 27.24±7.35 and 25.45±8.45) for crossbred dairy cows in rural, peri‑urban and urban, months, respectively. Generally, the dairy cow were characterized by long time taken to reach age at first services and calving, long calving interval and, open days in the study area. Therefore, selective breeding program should be applied rather than rely only on AI/Bull service crossbreeding. Moreover, supportive materials that used for grinding and mixing feed such as fodder and crop residue should be provided for small holder producers by respective institutions.