The study of microplastic transfer in the atmospheric compartment is gaining traction as a scientific field, as it represents a likely major transport vector for microplastics into the environment. In this work, microplastic atmospheric deposition was monitored in four distinct sampling sites characterized by varying levels and forms of human activity. Two sampling sites were located in urban environments, the other two were surrounded by agricultural activities. Two sampling sites were in proximity to the Paris urban area, while the other two were in proximity to the Nantes metropolis. After collection, all samples underwent a treatment consisting of a density-based separation and an oxidative digestion, before they were analysed using an automated µFTIR imaging analysis with a Nicolet iN10 by Thermo Scientific, identifying particles down to a size of 25 µm. Median microplastic deposition rates of 60.2 and 29.2 MP.m-2.d-1 were measured in the urban sites, against medians of 40.3 and 14.3 MP.m-2.d-1 in the rural sites. In each metropolis environment, lower deposition rates were measured in rural sites than in urban sites. The polymer types were similar between sites, dominated by polypropylene, polyethylene and polystyrene. Smaller particles represented the majority of the identified microplastics. Differences were however noted between sites, with PE more present in rural sites and a higher diversity of microplastics in the urban sites. No clear impact of precipitations or wind direction on microplastic deposition was measured, suggesting the differences in human activity were the dominant factor. To better assess the relation between precipitation and atmospheric deposition of microplastics, separate sampling of dry and wet-only atmospheric fallout during rain events should be conducted and compared.