This study explored the influence of digital psychology on the purchase decision of Jumia customers in Ilaro, Ogun State. Employing a descriptive survey research design, the study examined the effects of web design/user experience and persuasive language on online purchase decisions. Primary data was collected from 384 respondents using a structured questionnaire, determined from an infinite population using the Cronbach formula. Regression analysis, specifically a multiple regression model, was employed for data analysis using SPSS Version 27. Results revealed a strong positive relationship between Digital Psychology components and Consumer Buying Behaviour. The model summary indicates a moderately strong relationship (R = 0.717) between web design/user experience and persuasive language, web design/user experience and consumer buying behaviour, with approximately 51.5% of the variance explained. The ANOVA results confirm the significance of the regression model (F = 157.543, p < 0.001), indicating the collective influence of web design/user experience and persuasive language on Consumer Buying Behaviour. Coefficients from the regression model highlight the significant effects of web design/user experience (β= 0.535) and persuasive language (β= 0.265) on Consumer Buying Behaviour. Businesses are recommended to emphasize understanding digital psychology principles and embrace web design/user experience components and persuasive language in their online marketing content to enhance consumer engagement and drive purchasing decisions in the digital marketplace.