The Nigerian Conservation Foundation (NCF), in partnership with Population Matters, a UK based charity, and with the support of the Lagos State Government, commemorated the World Population Day on Thursday, 11th July 2019 at Lekki Conservation Centre. This maiden edition hosted by the foundation themed Population and sustainability in Nigeria and beyond had on, discuss topics such as population growth and environmental sustainability; overpopulation in the developed world and a global approach; health implication of increasing human population in Nigeria and impact of increasing human population on Lagos environment and possible solution. Some the causes of overpopulation the experts talked about are; Poverty (believed to be the leading cause of overpopulation), illiteracy, lack of family planning, increased birth rates and low mortality rates, male child preference, early marriage, and child brides, immigration, traditions and culture influence, and religious beliefs. The keynote speaker, Barrister Bimbola Salu-Hundeyin, Honourable Commissioner, National Population Commission (NPopC), who was represented by Mrs. Simiat Lawal, Deputy Director, NPopC Lagos observed that overpopulation affect human health especially the vulnerables. She stated that “It is my expectation that all stakeholders will continue to work together and harder to achieve the noble objectives of making life worth living for the…