An ecological study was conducted in Zerat Afromontane Forest in North Showa Zone of Ethiopia. Systematic sampling was used to collect vegetation data from 66 sample plots of size 20 x 20 m. The altitude of each sample plot was measured using Garmin GPS. Anthropogenic disturbance in each plot was estimated using the following scales: 0 = no disturbance, 1 = slightly disturbed, 2 = moderately disturbed and 3 = highly disturbed. R statistical package was used to analyze the data. A total of 156 plants belonging to 67 families were identified. Cluster analysis revealed that there were three plant communities in the study area. Analysis of variance showed that plant distribution in Zerat forest was significantly related with altitude and disturbance. As disturbance has considerable influence on the plant communities, mitigation of disturbance should be one of the main measures that need to take into account in conservation planning in the study site.