In the present study, changes in the quality characteristics of the albumin and yolk parts of the eggs obtained from different poultry systems for four seasons were investigated. The highest egg weight, shell thickness, dry shell weight, shell deformation, shell fracture, and vitellin membrane strength values were determined to be in cage systems with 70.92 g, 0.45 mm, 9.46 g, 0.79 mm, 71.80 N, and 0.13 N, respectively. L* values of the white and yolk parts increased in the transition between seasons (spring-winter). The highest Salmonella spp. and Escherichia coli counts were determined in backyard poultry in winter with 9% and 5% in the albumin, and 6% and 4% in yolk parts, respectively. The highest Listeria spp. count was determined in the eggs obtained from backyard system in summer (2% in white part and 6% in yolk part). Only 5 out of 1,200 eggs collected were positive for Campylobacter spp.