The following table shows the concentrations (ppt) of carbonyl sulfide (OCS) that were sampled during the URBAG measurement campaign during the months of May and October 2020 (see urbag.eu for more information). Air samples were taken at the eight sites in the Metroolitan Area of Barcelona, representing the heterogeneity of land use as follows: agricultural area (located in the Gavà and Prat areas), urban forest (Tibidabo and Collserola), urban green (Montjuic and Guinardó) and urban built environment (Sagrada Familia and Poble Nou). Wind direction is given in degrees; Wind speed m/s; temperature in ºC, and Pressure is QFE in hPa; relative humidity (RH) is in %; PBLH is extracted from WRF model and is in m. This data set is publically available as part of the Open Research section of the manuscript “Exploring the influence of land use on the urban carbonyl sulfide budget: a case study of the Metropolitan Area of Barcelona”, recently submitted to JGR Atmospheres.