This is a list of butterflies found in the U.S. state of Oregon.^[1][2]

Hesperiidae, skippers

• Epargyreus clarus, silver-spotted skipper
• Thorybes pylades, northern cloudywing
• Thorybes diversus, western cloudywing
• Thorybes mexicana, Mexican cloudywing
• Erynnis icelus, dreamy duskywing
• Erynnis propertius, Propertius duskywing
• Erynnis pacuvius, Pacuvius duskywing
• Erynnis afranius, Afranius duskywing
• Erynnis persius, Persius duskywing
• Pyrgus ruralis, two-banded checkered-skipper
• Pyrgus communis, common checkered-skipper
• Heliopetes ericetorum, northern white-skipper
• Pholisora catullus, common sootywing
• Hesperopsis libya, Mohave sootywing
• Carterocephalus palaemon, arctic skipper
• Oarisma garita, garita skipperling
• Hesperia uncas, Uncas skipper
• Hesperia juba, Juba skipper
• Hesperia colorado, western branded skipper
• Hesperia columbia, Columbian skipper
• Hesperia lindseyi, Lindsey's skipper
• Hesperia nevada, Nevada skipper
• Atalopedes campestris, sachem
• Polites peckius, Peck's skipper
• Polites sabuleti, sandhill skipper
• Polites mardon, Mardon skipper
• Polites themistocles, tawny-edged skipper
• Polites mystic, long dash
• Polites sonora, Sonora skipper
• Ochlodes sylvanoides, woodland skipper
• Ochlodes agricola, rural skipper
• Ochlodes yuma, Yuma skipper
• Euphyes vestris, dun skipper
• Amblyscirtes vialis, common roadside-skipper

Papilionidae, parnassians and swallowtails

• Parnassius clodius, Clodius parnassian
• Parnassius smintheus, Rocky Mountain parnassian
• Battus philenor, pipevine swallowtail
• Papilio machaon, Old World swallowtail
  • Papilio machaon oregonius, Oregon swallowtail
• Papilio zelicaon, anise swallowtail
• Papilio indra, Indra swallowtail
• Papilio rutulus, western tiger swallowtail
• Papilio eurymedon, pale swallowtail
• Papilio multicaudata, two-tailed swallowtail

Pieridae, whites and sulphurs

• Anthocharis sara, Pacific orangetip
• Anthocharis stella, Stella orangetip
• Anthocharis lanceolata, gray marble
• Euchloe ausonides, large marble
• Euchloe lotta, desert marble
• Euchloe hyantis, California marble
• Neophasia menapia, pine white
• Pieris marginalis, margined white
• Pieris rapae, cabbage white
• Pontia beckerii, Becker's white
• Pontia protodice, checkered white
• Pontia occidentalis, western white
• Pontia sisymbrii, spring white
• Colias philodice, clouded sulphur
• Colias eurytheme, orange sulphur
• Colias occidentalis, western sulphur
• Colias alexandra, Queen Alexandra's sulphur
• Colias pelidne, pelidne sulphur
• Colias interior, pink-edged sulphur
• Phoebis sennae, cloudless sulphur
• Pyrisitia proterpia, tailed orange

Lycaenidae, gossamer-wing butterflies

• Lycaena arota, tailed copper
• Lycaena phlaeas, American copper
• Lycaena cupreus, lustrous copper
• Lycaena xanthoides, great copper
• Lycaena editha, Edith's copper
• Lycaena gorgon, gorgon copper
• Lycaena rubidus, ruddy copper
• Lycaena heteronea, blue copper
• Lycaena helloides, purplish copper
• Lycaena nivalis, lilac-bordered copper
• Lycaena mariposa, mariposa copper
• Euphilotes columbiae, Columbian blue
• Habrodais grunus, golden hairstreak
• Atlides halesus, great purple hairstreak
• Callophrys affinis, western green hairstreak
• Callophrys sheridanii, Sheridan's green hairstreak
• Callophrys nelsoni, Nelson's hairstreak
• Callophrys gryneus, juniper hairstreak
• Callophrys spinetorum, thicket hairstreak
• Callophrys johnsoni, Johnson's hairstreak
• Callophrys augustinus, brown elfin
• Callophrys mossii, Moss' elfin
• Callophrys polios, hoary elfin
• Callophrys eryphon, western pine elfin
• Satyrium titus, coral hairstreak
• Satyrium californica, California hairstreak
• Satyrium sylvinum, sylvan hairstreak
• Satyrium auretorum, gold-hunter's hairstreak
• Satyrium tetra, mountain mahogany hairstreak
• Satyrium saepium, hedgerow hairstreak
• Satyrium behrii, Behr's hairstreak
• Satyrium fuliginosum, sooty hairstreak
• Satyrium semiluna, sagebrush sooty hairstreak
• Strymon melinus, gray hairstreak
• Leptotes marina, marine blue
• Brephidium exilis, western pygmy-blue
• Cupido comyntas, eastern tailed-blue
• Cupido amyntula, western tailed-blue
• Celastrina ladon, spring azure
• Celastrina echo, echo azure
• Glaucopsyche piasus, arrowhead blue
• Glaucopsyche lygdamus, silvery blue
• Philotiella leona, pumice dotted-blue
• Euphilotes battoides, western square-dotted blue
• Euphilotes intermedia, intermediate dotted-blue
• Euphilotes enoptes, Pacific dotted-blue
• Euphilotes ancilla, Rocky Mountain dotted-blue
• Plebejus idas, northern blue
• Plebejus anna, Anna's blue
• Plebejus melissa, Melissa blue (includes Karner blue)
• Icaricia saepiolus, greenish blue
• Icaricia icarioides, Boisduval's blue
• Icaricia shasta, Shasta blue
• Icaricia acmon, Acmon blue
• Icaricia lupini, lupine blue
• Agriades podarce, Sierra Nevada blue

Riodinidae, metalmarks

• Apodemia mormo, Mormon metalmark

Nymphalidae, brush-footed butterflies

• Danaus plexippus, monarch
• Danaus gilippus, queen
• Euptoieta claudia, variegated fritillary
• Speyeria cybele, great spangled fritillary
• Speyeria coronis, Coronis fritillary
• Speyeria zerene, zerene fritillary
• Speyeria callippe, callippe fritillary
• Speyeria egleis, Great Basin fritillary
• Speyeria hesperis, northwestern fritillary
• Speyeria hydaspe, Hydaspe fritillary
• Speyeria mormonia, Mormon fritillary
• Boloria selene, silver-bordered fritillary
• Boloria bellona, meadow fritillary
• Boloria epithore, pacific fritillary
• Limenitis archippus, viceroy
• Limenitis lorquini, Lorquin's admiral
• Limenitis weidemeyerii, Weidemeyer's admiral
• Adelpha californica, California sister
• Chlosyne leanira, leanira checkerspot
• Chlosyne hoffmanni, Hoffmann's checkerspot
• Chlosyne acastus, sagebrush checkerspot
• Chlosyne palla, northern checkerspot
• Phyciodes orseis, California crescent
• Phyciodes pallida, pale crescent
• Phyciodes mylitta, Mylitta crescent
• Phyciodes cocyta, northern crescent
• Phyciodes pulchella, field crescent
• Euphydryas gillettii, Gillette's checkerspot
• Euphydryas editha, Edith's checkerspot
• Euphydryas chalcedona, Chalcedon checkerspot
• Euphydryas anicia, Anicia checkerspot
• Euphydryas colon, colon checkerspot
• Junonia coenia, common buckeye
• Polygonia satyrus, satyr comma
• Polygonia faunus, green comma
• Polygonia gracilis, hoary comma
• Polygonia zephyrus, zephyr comma
• Polygonia progne, gray comma
• Polygonia oreas, oreas comma
• Aglais io, European peacock
• Aglais milberti, Milbert's tortoiseshell
• Nymphalis vaualbum, Compton tortoiseshell
• Nymphalis antiopa, mourning cloak
• Nymphalis californica, California tortoiseshell
• Vanessa atalanta, red admiral
• Vanessa cardui, painted lady
• Vanessa annabella, West Coast lady
• Vanessa virginiensis, American lady
• Coenonympha tullia, common ringlet
• Erebia epipsodea, common alpine
• Neominois ridingsii, Ridings' satyr
• Oeneis nevadensis, great arctic
• Cercyonis pegala, common wood-nymph
• Cercyonis sthenele, Great Basin wood-nymph
• Cercyonis oetus, small wood-nymph