<p>Linking smallholder farmers to modern value chains through contract agriculture (CA) is one of the rural development strategies being promoted to address the challenge of smallholders’ integration in markets. However, the conditions under which CA enhances smallholders’ prospects for inclusion in modern value chains is still debatable. This paper examines the determinants of smallholders’ participation in Zambian dairy markets through interlocked contractual arrangements (ICAs). A multi-stage sampling design was used to select 266 households from milk shed areas from three districts in Lusaka and Central provinces of Zambia. A double-hurdle model was estimated from data collected through semi-structured questionnaires, key informant interviews and focus group discussions. Key determinants of smallholders’ participation in ICAs included ownership of improved breed animals, MCC milk price, access to dairy marketing information, income from other sources and landholding size. While most of these factors also affected the proportion of milk sold, the following were also important: household head education level, cattle rearing culture, extent of supplier’s dependency on buyer and trust in the exchange relationship. To enhance smallholders’ market participation, there is need to facilitate their access to extension services, infrastructure (breeding centres, MCCs and water) and affordable stock feed, and to offer them an effective milk price that is higher than the spot market price. Promotion efforts should target smallholders that are literate, from a cattle rearing culture, and particularly encourage youth and women participation. There is also need for building trust in the exchange relationship and judicious use of power by processors.</p>