The data file presents information on the quantitative taxa distribution for plant macrofossils in the Holocene sediment cores of mires in the Kaliningrad region (Russian Federation, South-Eastern Baltic Region), as well as 24 radiocarbon dates (14C). The dataset contains percentages of 51 most common (more than 1%) taxa in 1361 samples of 45 sediment cores. These data provide information on environmental development and evolution of the azonal wetland vegetation in the south-eastern part of the Baltic region during the Holocene.
Keywords: Baltic region; Holocene sediment cores; Micropaleontology; Mires; Plant macro-remnants.