Paleoenvironmental data generated from the analysis of Erenderi wetland palustrine sediment core (Eren4C) collected in 2020. Includes geochronological and sedimentological data: radiocarbon age determinations, diatoms, pollen, charcoal and plant macroremains and chitinous invertebrates; used to interpret and reconstruct past water quality variability, vegetation cover, and paleofires, during the Late Holocene. See site description and methods in associated publication (Muiruri et al., 2026 The Holocene).