This paper assesses the influence of environmental (non-genetic) factors of kid production traits of Kacang goats under smallholder production systems in Purwodadi regency in Central Java. The traits evaluated in this study were birth weight, weaning weight and pre-weaning growth weight. The environmental factors assessed were sex, type of birth, and dam's parity (1-7). Data was analysed statistically using the General Linear Model. The results showed that dam's parity, birth type and sex of the kid were significant sources of variation for Kacang kid production traits. Furthermore, the average birth weight, weaning weight and pre-weaning growth of males (2.07±0.02 kg; 10.457±0.1 kg; 69.35±0.73 g/d) were found to be higher than females (1.95±0.02 kg; 9.15±0.09 kg; 60.73±0.71 g/d). Kid production traits increased with parity, with the largest values at the fourth parity and then slightly decreased thereafter. The average male and female production traits of single kids were heavier than twins and triplets indicating the influence of the mothering ability of doe. The authors recommend that farmers consider maternal ability for improvement of weaning weight and growth rate of Kacang kids.