BackgroundIn India, twenty-five percent of women who menstruate are unable to utilize sanitary methods, and even among those who have access, there are multiple obstacles to achieving proper menstrual hygiene management. The consequences of inadequate menstrual health may extend to affect a girl’s socialisation, empowerment, overall well-being, and even survival. ObjectivesTo estimate the prevalence of unmet menstrual practice needs and its determinants among college going women in Coimbatore district, India. MethodologyA questionnaire based analytical cross-sectional study was conducted among 3144 college going women from October 2022 to January 2023. Menstrual Practice Needs Scale (MPNS-36) was used to collect data regarding the unmet needs and their mean scores were compared across socio-demographic variables, menstrual knowledge, and the choice of hygiene material. ResultsThe mean (SD) age of the study population was 19.3 (1.8) years. The prevalence of unmet menstrual practice needs was 62.8% with a mean (SD) MPNS score of 1.8 (0.4). The total MPNS score was low for those currently residing in rural or having a rural hometown. The unmet need was better for those residing in-campus of the educational institute and having educated parents. The socioeconomic class and presence of a personal income also influenced the total MPNS scores significantly (p < 0.05). Menstrual talks with friends before puberty and with friends and family after puberty improved the MPNS scores. Regarding menstrual hygiene methods, modern menstrual methods (MMM), disposable and bio-degradable materials had a lower unmet need. Marital status, freedom to manage expenses, pre-pubertal menstrual talks with family, and total number of family members did not influence the scores of MPNS. Multivariate regression analysis showed that maternal education, menstrual talks with family after puberty, and type of menstrual hygiene method including its disposability were independent predictors of total MPNS scores. ConclusionAddressing unmet menstrual practice needs among college-going women in Coimbatore district necessitates a multifaceted approach encompassing education, access to affordable and sustainable menstrual products, and destigmatization efforts.