The barn owl is the most widely distributed species of owl in the world and one of the most widespread of all species of birds, being found almost everywhere in the world except for the polar and desert regions, Asia north of the Himalayas, most of Indonesia, and some Pacific Islands. It is also known as the common barn owl, to distinguish it from the other species in its family, Tytonidae, which forms one of the two main lineages of living owls, the other being the typical owls (Strigidae). Source: Wikipedia
Tyto alba alba: western and southern Europe; western Canary Islands, and North Africa
Tyto alba guttata: central Europe eastward to Latvia, Lithuania, and Ukraine, and southeastward to Albania, Macedonia, Romania, and northeastern Greece
Tyto alba ernesti: Corsica and Sardinia
Tyto alba erlangeri: Crete and Cyprus to southwestern Iran, northeastern Egypt, and southern Arabian Peninsula
Tyto alba schmitzi: Madeira and Porto Santo islands (Madeira Archipelago)
Tyto alba gracilirostris: eastern Canary Islands (Fuerteventura, Lanzarote, and Alegranza)
Tyto alba [poensis, affinis or hypermetra]: sub-Saharan Africa (including Bioko, Zanzibar, and Pemba), Comoros, and Madagascar
Tyto alba thomensis: São Tomé (Gulf of Guinea)
Tyto furcata [furcata or niveicauda]: Cuba, Cayman Islands, and Jamaica
Tyto furcata [pratincola or lucayana]: southern Canada to northern Mexico, Bermuda, Bahamas, and Hispaniola
Tyto furcata [guatemalae or subandeana]: western Guatemala to Panama including Pearl Islands, and Colombia
Tyto furcata bondi: Bay Islands off northern Honduras (Roatán and Guanaja)
Tyto furcata hellmayri: Isla Margarita (off Venezuela), Trinidad and Tobago, and the Guianas to northern Brazil
Tyto furcata contempta: western Colombia to Venezuela, Ecuador, and Peru
Tyto furcata [tuidara or zottae]: Brazil south of the Amazon River to Tierra del Fuego and Falkland Islands
Tyto furcata bargei: Curaçao
Tyto furcata punctatissima: Galapagos
Tyto javanica javanica: Malay Peninsula to Greater Sundas
Tyto javanica stertens: Indian subcontinent to northern Sri Lanka, southwestern China, and southern Thailand
Tyto glaucops insularis: St. Vincent and Grenada and satellite islands (southern Lesser Antilles)
Tyto glaucops nigrescens: Dominica (Lesser Antilles)