In this paper, we provide a spatial analysis of agriculture in three mid-sized French cities, with a particular focus on professional farms. The existence of important agricultural spaces inside the cities is confirmed. We reveal the persistence of a field-based, market-oriented agriculture in French mid-sized cities, often ignored in studies on urban agriculture, and usually made invisible. Our results highlight the farms' diversity, as well as a diversity of farmers' viewpoints on the relations between urban and agricultural places. We emphasise the importance of three main determinants in the observed dynamics: the cities' geographies; the impact on farmers of land speculation and urbanisation; and the implementation of resistance and adaptation processes by some farmers. These results are discussed in relation to the literature on urban and peri-urban agriculture.