The Iberian Margin, located in the North Atlantic mid-latitudes at the western edge of the European continent, is a crucial area for climate and oceanographic reconstructions. As part of the PTDC/CTA-CLI/2884/2021- Impact of climate warming in the coastal upwelling system and primary production off Portugal: a study linking classical and emerging proxies - ICW3P project, this study presents multi-proxy records from three inner-shelf sediment sequences collected from sites in the northwestern region, off the Douro River mouth (POS287-06G), west of the Tagus River mouth (POS-26B and -26G), and along the Algarve coast in front of Faro (POPEI_VC2B). The Portuguese western coast marks the northernmost boundary of the Canary Current upwelling system and experiences seasonal (May to September) wind-driven coastal upwelling. The Eastern Boundary Upwelling Systems (EBUS) are among the most productive regions in the global ocean, playing a vital role in climate regulation and supporting both local and global fisheries. Sediment records from the western coast were collected using box-core and gravity coring systems during the Poseidon Cruise PO287 in 2002, while the Algarve core POPEIVC2B was obtained with a vibro-core sampler during the POPEI Cruise in 2008. As part of a multi-proxy approach to evaluating different nutrient sources and paleoceanographic features of the Iberian Margin with the aim of reconstructing primary productivity and phytoplankton community variability over the past 1,000 years, stable oxygen (d18O) and carbon (d13C) isotope values were measured in foraminiferal calcite from planktonic (G. bulloides and G. inflata) and benthic (Uvigerina sp.) species, at the Marum Stable Isotope Laboratory (University of Bremen) in 2025. This was done using a Finnigan MAT 251 gas isotope ratio mass spectrometer coupled to a Kiel I automated carbonate preparation device (Finnigan MAT 251 GC-IRMS).