The study is on the Demographic analysis on proximate and contextual determinant of fertility in Nigeria. It employs the use of secondary source of data from Nigeria Demographic and Health Survey between 2003 – 2008.The aim is to study how proximate and contextual determinant contribute to the reduction of fertility among currently married women in Nigeria. The methodology are the use of Bongaart model for the analysis of proximate determinant of fertility. The percentage, proportion and chi- square were also used in the area of analysis. The results of the analysis shows that contextual determinants can influence fertility only through the proximate determinant. The proportion of married women remains the most important proximate determinant responsible for reduction in

fertility in Nigeria. The analysis revealed that age at first marriage rose from 16.6years to 18.3years,contraceptive used increased from 12.6% to 14.6%.Result of chi-square test shows that contextual determinant is statistically significant in relation to the proximate determinant of fertility.