Concrete is a widely used material in construction globally, with cement being a key component. However, cement is expensive and not always readily available. To address this, research has been conducted to explore replacing cement partially or entirely with more affordable or locally sourced materials. The use of ceramic and marble waste powder, which is often disposed of improperly, contributes to environmental pollution and public health. By repurposing these waste materials in various industries like construction, agriculture, glass, and paper, the environment can be safe guarded. A study conducted in Bahir Dar city aimed to assess the impact of substituting cement with ceramic and marble waste powder mix on mortar properties. The CWP and MWP materials have been characterized using x-ray fluorescence (XRF). CWP is classified as a Class F pozzolanic material, with the summation of SiO2, Al2O3, and Fe2O3 being 92.84%, which is greater than the required 70%. On the other hand, MWP does not meet the ASTM C618-03 standard for pozzolanic materials, as the summation of SiO2, Al2O3, and Fe2O3 is only 5.94 %. several researchers consistently employed the same percentage, this research tends to use an equal amount of CWP and MWP added to the regular Mortar mix after carrying out trial mixes for the amount of CWP and MWP and applied to the replacement percentages of 5%, 10%, 15%, 20% and 25% by weight of cement. The results of compressive strength, sulfate attack and ultrasonic pulse velocity(UPV), thus compressive strength of cured Mortar demonstrate that it is stronger when up to 10% of the cement is replaced with a mixture of CWP and MWP. A decrease in Workability with the replacement of CWP and MWP. The water absorption of mortar specimens exhibited a similar trend, decreasing with a higher replacement percentage up to (Mix -2)-10, followed by a gradual increase after 15% to 25% replacement. (TGA) and (DTA) analysis result indicates that an escalation in the percentage of cement replacement by combining CWP and MWP leads to an increased mass loss. Mortar strength can be improved by adding Ceramic waste and Mable waste powder to Mortar. At the last, the paper recommended determining the microstructural result for scanning electron magnetic(SEM)and surface area (BET)where cement is blended with ceramic and marble waste powders. Key words: compressive strength, cement, ceramic waste powder and marble waste powder