An air-ventilated trash container suitable for supporting a collapsible trash bag having an open-top hollow container body that includes an integrated sidewall joined to a closed bottom is provided. The integrated sidewall includes an upright inner sidewall configured with a plurality of upper air release orifices and a plurality of laterally spaced apart, generally vertical ribs disposed extending outwardly from the inner sidewall. The ribs define between themselves a plurality of narrow channels that extend longitudinally to provide a passage during bag installation for the escape of air trapped between the inner sidewall, during bag filling to allow the bag to fully expand, and during bag removal to prevent the formation of a vacuum that would tend to cause the retention of the bag inside the container.