Small and medium enterprises (SMEs) have been identified as catalysts for the economic growth in Nigeria as they are major sources of income generation and job creation and contribute immensely to the nation’s gross domestic product (GDP) as well as livelihood sustainability in the country. Despite what private investors and government have done and still doing in order to enhance the performance of the SMEs, most of them are still constrained by poor management skills and lack of modern technology, which may be as a result of inadequate financing leading to inadequate sales growth. The general objective of the study was to determine the effects of entrepreneurial financing dimensions on the sales growth of selected SMEs in Ogun State, Nigeria. The study adopted cross-sectional survey research design. The population comprised 1,794 owner/managers of SMEs. The sample size was 425. A validated questionnaire was administered for data collection. The Average Variance Extracted of the constructs ranged from 0.741 to 0.908. The response rate was 82.4%. Data were analysed using descriptive and inferential statistics and multiple regressions. Findings from the study revealed that eentrepreneurial financing dimensions (bank loans, government grant, venture capital, funds from family) had positive and significant effect on sales growth of SMEs in Ogun State (R = 0.601, Adj. R2 = 0.354, F (4, 345) = 48.764, p < 0.05). The study concluded that entrepreneurial financing dimensions play an important role in enhancing the performance of selected SMEs in Ogun State, Nigeria. Thus, this study recommended that the financial institutions should creatively craft and adopt the availability of cheaper funds that would spur the sales growth of SMEs with view to sustainability while enhancing economic growth.