The change in our ecosystem today has creates a lot social challenges. Climate change which is one of the major causes of ecological change is attributed to both the nature and human causes. The issue has resulted in many soft security issues such as health related security issue, food security issue and socio-economic issue. This study examines how ecological change has affected health security of the people in the study area. The study use a sample of three states in the North central zone of Nigeria. The study uses an observation of 385 and the data collected were analyses using Kendell tau test of concordance. The study has found that ecological changes have significant effect on health security in the study area. The study notes that ecological change increase vulnerability to diseases such as malaria, typhoid and zoonosis. These happening thus creates health related issues in the affected areas. On the basis of the finding, it is recommended people in the affect areas should need to be health cautious by treating their drinking water and using anti-mosquitos nets and to equally avoid contact with unfamiliar animals. Keywords: Ecological change, health security and test of concordance