Various concentrations of Chenopodiaceae/Amaranthaceae pollen are detected in the air of many regions of Europe. The highest content of pollen produced by the taxon is reported in southern Europe and in other countries with a warm climate and low precipitation sums. The study was focused on characterization of the Chenopodiaceae/Amaranthaceae pollen season in 11 Polish cities: Bialystok, Bydgoszcz, Cracow, Lublin, Olsztyn, Piotrkow Trybunalski, Sosnowiec, Szczecin, Warsaw, Wroclaw, and Zielona Gora in 2020. The volumetric method based on the use of the Lanzoni or Burkard pollen sampler was employed in the study. In 2020, the pollen season in the analyzed plant family began in the second half of June and ended during the first ten days of October. The earliest pollen season onset was recorded in Lublin (June 13th) and Szczecin (June 14th), whereas the latest beginning was noted in Wroclaw (July 5th). The earliest and latest end of the pollen season was recorded in Bialystok (September 6th) and in Olszyn (October 5th), respectively. In terms of length, the season was characterized by the shortest duration in Wroclaw (70 days) and the longest duration in Olsztyn (106 days). In most of the analyzed cities, maximum pollen concentrations were detected in the second half of August, and the highest values were recorded in Zielona Gora and Sosnowiec. Compared to 2019 and 2018, relatively low sums of the annual concentrations of Chenopodiaceae/Amaranthaceae pollen grains, i.e. in the range of 35–231, were recorded in Poland in 2020. The highest values of this parameter were reported in Olsztyn (231) and Lublin (230), whereas the lowest value was noted in Bialystok (35). The relatively low maximum concentrations of Chenopodiaceae/Amaranthaceae pollen recorded during the study year indicate a low risk of development of allergy symptoms induced by the presence of pollen of this taxon in the air.