The mealybug fauna of southern Iran (Systan & Baluchestan, Hormozgan, Bushehr, Khuzeztan and Fars provinces) is unknown to many coccidologists. In this paper, 17 mealybug species from the south of Iran with their host plants are reported. Maconellicoccus hirsutus (Green), Nipaecoccus viridis (Newstead) and Planococcus ficus (Signoret) are the important pests and Ferrisia virgata (Cockerell), Dysmicoccus brevipes (Cockerell) and Planococcus vovae (Nasonov) are regarded as potential pests. Antonina graminis (Maskell), Brevennia rehi (Lindinger), Dysmicoccus boninsis (Kuwana), Peliococcopsis priesneri (Laing), Peliococcus kimmericus (Kiritshenko), Phenacoccus solani Ferris, Formicococcus robustus (Ezzat & McConnell), Planococcus citri (Risso), Pseudococcus viburni (Signoret), Trabutina serpentina (Green) and Trionymus multivorus (Kiritchenko) are regarded as pests but no records of damage have been reported from the south of Iran.