Soil collapse occurs when increased moisture causes a chemical or physical bonds between the soil particles to weaken, which allows the structure of the soil to collapse. In Iraq, gypseous soils cover about (20 to 30) % of its total area concentrated primarily on the west desert and extended to the southern parts and directed towards south west. This paper presents the collapse potential of Iraqi unsaturated gypseous soils under various initial conditions such as initial dry density and the initial degree of saturation. Three types of gypseous soils obtained from different parts of Iraq. Laboratory work included a series of single and double oedometer tests to investigate the collapse behavior of these unsaturated soils and the initial conditions that effected on it. It was found that For each soil, the collapse potential decreases with increases of dry unit weight. The increase of initial water content for each soil will decreases the values of collapse potential. The collapse potential increases with increase of the void ratio for each soil. For each soil, the collapse potential decreases when the initial degree of saturations increases.