To access the range of achieved equity in the spatial distribution for the investment by the region’s development program in Wasit province, the Gini coefficient, and Lorenz curve were utilized. Previously mentioned methodologies were used in the quantitative analysis. To measure the disparity and the optimal allocation of investments, a comparison is implemented. This comparison was between the percentage of allocating investment in development programs in the basic service sectors (municipal, sewage, water, roads, and education) and between the three components of (population, area, and level and disability). Findings showed that the local authorities depend on population (the municipal sector, sewage, urban water) and urban land area in allocating investments. Findings also showed a lack of interest by authorities in two factors. These factors are rural land area and the deficit in providing services. This deficit is reflected in the variation of equity in determining the number of investment allocations between different counties of Wasit province.