The informal sector is an integral part of Nigeria economy experiencing an increase and the condition is bound to continue. This study aimed at determining the impact of informal market on Nigeria potentials. The study area was Lagos and Anambra State, Nigeria. The areas includes Six (6) informal marketing hub namely; Alaba market, Balogun market and Computer village in Lagos State. While Anambra State consist; Onitsha market, Nnewi market and Eke-Awka market.  A random sampling technique was employed, through the use of structured questionnaire on a sample of one hundred and twenty (120); Abattoir marketers (20), Food vendors (20), Furniture makers (20), Confectionery (20), Phone accessories (20), Tailoring and Hair care (20). One hundred (110) were used for data analysis. The Pearson product moment correlation coefficient was used to confirm formulated hypotheses. The study found that there is significant impact on informal market to the Nigeria economy but its potentials are yet to be fully realized and also has contributed significantly to gross domestic product (GDP). The study also recommended that there is need for the Nigeria government to institute reforms that could improve social institutions and governance, increase productivity and spur economic growth.