ABSTRACT: In this study, information about the harmful Lygaeoidea Schilling, 1829 (Hemiptera) superfamily species and their effects on olive plants in olive (Olea europaea, Linnaeus, 1758) which contains various vitamins and minerals with high economic value, which are cultivated efficiently in the Marmara, Aegean and Mediterranean regions rich in antioxidant and anti-inflammatory nutrients that remain green in all seasons, specific to the Mediterranean climate, whose homeland is Anatolia, was compiled by making use of related studies. As a result of the researches, 20 species (Aphanus rolandri (Linnaeus, 1758), Geocoris lineola (Rambur, 1839), Graptostethus servus (Fabricius, 1787), Geocoris megacephalus (Rossi, 1790), Heterogaster urticae (Fabricius, 1775), Horvathiolus superbus (Pollich, 1781), Lamprodema maura (Fabricius, 1803), Lygaeus creticus (Lucas, 1854), Microplax albofasciata (A. Costa, 1847), Nysius cymoides (Spinola, 1837), Oxycarenus pallens (Herrich-Schaeffer, 1850), Peritrechus meridionalis Puton, 1877, Plinthisus longicollis Fieber, 1861, Proderus belloveyei Puton,1874, Raglius alboacuminatus (Goeze, 1778), Paromius gracilis (Rambur, 1839), Remaudiereana annulipes (Baerensprung, 1859), Xanthochilus quadratus (Fabricius, 1798), Scolopostethus pictus (Schilling, 1829), Spilostethus pandurus (Scopoli, 1763) from the Lygaeoidea superfamily are observed as olive pests in Türkiye. KEY WORDS: Heteroptera, Olea europaea, Lygaeoidea, pest, Türkiye .