The conducted study aimed to investigate the quantity and composition of municipal waste deposited in landfills in the Peja District of Kosovo over the period of 2005-2021. The study covered four municipalities within the district: Peja, Klina, Istog, and Deçan. A total of 705,246.7 tons of waste were deposited during the analyzed period, with the municipality of Peja depositing the largest amount (428,347.9 tons) and Deçan the smallest (67,143.6 tons). Regarding the composition of waste, the majority of municipal waste consists of biodegradable components (about 38%), followed by plastic (20 %), paper and cardboard (17 %), glass (7 %), textile (5%), diapers (3%), tetra-Pak (1.5%), metals (1%), construction materials (1%) and small waste (6.5%). This investigation contributes to municipal waste management to know the exact amount of waste produced and its composition.