The paper examined the socio-economic factors of development in the Delta state of Nigeria. The major source of data is secondary and the statistical technique is the step-wise multiple regression. The household income was used as an index of development while the socio-economic variables included population, education, and employment, capital water projects, housing unit, health centres, industries and police station. Four key socio-economic variables of population, health centres, employment and capital water projects were identified as being responsible for 80% of the variation in the development of Delta state of Nigeria among other variables. Solutions to identified problems were proffered.