Purpose: The objective of the study was to determine the level and determinants of demand for extension services among small-scale maize farmers in Kenya. Design/methodology/approach: Based on an exploratory research design, primary data were collected from a sample of 352 households through face-to-face interviews. Focus group discussions were used to collect contextual data. The sample comprised of organic and conventional small-scale maize farmers in Bungoma County, Kenya. In data analyses, descriptive statistics and a zero inflated negative binomial regression were employed. Findings: Results indicate that organic farmers had a mean of three contacts with extension providers compared to conventional farmers who had a mean of one contact during the year. Further, age of the household head, education level, farming experience, amount of off-farm income and credit received, group membership, land tenure and distance to the nearest extension service provider significantly influence the demand for extension services. Practical implications: The major policy implication from the findings is that; whether farmers are organic or conventional, extension agents should customize their services according to their clients' socio-economic characteristics in order to improve demand for agricultural extension services. Originality/value: The study contributes to knowledge by applying the count data models in modeling the determinants of demand for extension services at a micro-level.