The purpose of this research was to find out Impact of Vocabulary Load on Hausa Essay Writing performance of primary school pupils in Sabon-Gari Local Government Kaduna State. Research questions were designed and corresponding hypothesis were formulated. The hypothesis sought to test significant between the performance of experimental and control group on Essay writing.120 pupils were purposively sample from two schools in 62 primary schools one as control the other one as experimental. Quasi experimental design were used. The findings answer the following questions: is there impact of vocabulary load at the rate of content, expression, organization and mechanical accuracy of pupils Essay Writing in primary schools. The instrument was 120 words from different aspect of life which elicit data for the research, it is analysed using mean and standard deviations for the research question T-Test for hypotheses at 0.05 level of significance. The research revealed that experimental group performed better after treatment. Implications on students, teachers, and Educational Authorities were provided. Recommendations were provided based on the findings,that emphasis should be made on contextual use of the meaning of words and registers of a specific discipline of a topic in Hausa Essay Writing. Student should be involved in vocabulary load learning strategy through independent reading etc.