In Manipur, characterized by its unique demographic landscape, fertility rates remain notably high within India. Despite efforts aligned with the National Population Policy (NPP) - 2000, comprehensive community-based studies on completed fertility determinants are lacking. This study investigates socio-demographic factors influencing completed fertility among menopausal women aged 50-55 in Manipur. Through retrospective cross-sectional analysis involving 1039 ever-married women in Bishnupur and Thoubal districts, data collected between March 2018 and February 2019 reveal significant associations between completed fertility (average 2.95 births) and education level (P<0.01), sex of the second-born child (P<0.01), and preference for sons (P<0.01). These findings offer insights for maternal health development and inform population control strategies, contributing to sustainable demographics in Manipur and beyond.