This checklist compiles the knowledge of scale insects (Hemiptera, Sternorrhyncha, Coccomorpha) and whiteflies (Hemiptera, Aleyrodoidea) from Luxembourg. The species on this checklist were compiled from the following four publications:Gertsson C.A. 2016 - A checklist of the scale insects (Hemiptera Coccomorpha) in Luxembourg. REDIA, XCIX, 2016: 151-153. http://dx.doi.org/10.19263/REDIA-99.16.19Gertsson, C.-A. and N. Schneider, 2020. An updated checklist of scale insects in Luxembourg (Hemiptera, Sternorrhyncha, Coccomorpha). Bulletin de la Societe des naturalistes luxembourgeois 122: 131-139. https://www.snl.lu/publications/bulletin/SNL_2020_122_131_139.pdfGertsson, C.-A., 2020. An annotated checklist of whiteflies (Hemiptera, Aleyrodidae) in Luxembourg. Bulletin de la Societe des naturalistes luxembourgeois 122: 247-251. https://www.snl.lu/publications/bulletin/SNL_2020_122_247_251.pdfGertsson, C.-A. and A. Weigand. First records of the Ivy scale Aspidiotus hedericola Leonardi, 1920 in Luxembourg (Hemiptera, Coccomorpha, Diaspididae). Bulletin de la Societe des naturalistes luxembourgeois