List of Quercus species

The genus Quercus contains about 500 known species, plus about 180 hybrids between them. The genus, as is the case with many large genera, is divided into subgenera and sections. Traditionally, the genus Quercus was divided into the two subgenera Cyclobalanopsis, the ring-cupped oaks, and Quercus, which included all the other sections. However, a comprehensive revision in 2017 identified different relationships. Now the genus is commonly divided into a subgenus Quercus and a subgenus Cerris, with Cyclobalanopsis included in the latter. The sections of subgenus Quercus are mostly native to the New World, with the notable exception of the white oaks of sect. Quercus and the endemic Quercus pontica. In contrast, the sections of the subgenus Cerris are exclusively native to the Old World.
Unless otherwise indicated, the lists which follow contain all the species accepted by Plants of the World Online as of 2023, plus selected hybrids that are also accepted, with placement into sections based on a list produced by Denk et al. for their 2017 classification of the genus.

Legend

Species with evergreen foliage are tagged '#'. Species in the genus have been recategorized between deciduous and evergreen on numerous occasions, although this does not necessarily mean that species in the two groups are closely related.

Subgenus ''Quercus''

Section ''Quercus''

Section Mesobalanus was included in section Quercus in the 2017 classification used here. Other synonyms include Q. sect. Albae and Q. sect. Macrocarpae. The section comprises the white oaks from Europe, Asia, north Africa, Central and North America. Styles short; acorns mature in 6 months, sweet or slightly bitter, inside of acorn shell hairless.

Quercus aculcingensis Trel. – Mexico
Quercus ajoensis C.H.Mull. – Ajo Mountain shrub oak, Blue shrub oak – Arizona, New Mexico, Baja California
Quercus alba L. – white oak – eastern and central North America
Quercus aliena Blume – Oriental white oak – eastern Asia
Quercus alpescens Trel. – Mexico
Quercus ariifolia Trel. – Mexico
Quercus arizonica Sarg. – Arizona white oak – # southwestern U.S., northwestern Mexico
Quercus austrina Small – bluff oak – southeastern North America
Quercus × basaseachicensis C.H.Mull. – Mexico
Quercus × bebbiana C.K.Schneid. — Bebb's oak — northeastern North America
Quercus berberidifolia Liebm. – California scrub oak – # California
Quercus bicolor Willd. – swamp white oak – eastern and midwestern North America
Quercus × bimundorum E.J.Palmer - two worlds oak - U.S.
Quercus boyntonii Beadle – Boynton's post oak – south central North America
Quercus canariensis Willd. – Mirbeck's oak or Algerian oak – # North Africa & Spain
Quercus carmenensis C.H.Mull. – Carmen oak – Coahuila and Texas
Quercus × cerrioides Willk. & Costa – east Spain
Quercus chapmanii Sarg. – Chapman oak – # southeastern U.S.
Quercus chartacea Trel. – Southern Mexico
Quercus chihuahuensis Trel. – Chihuahua oak – northern Mexico and Texas
Quercus congesta C.Presl – Italy
Quercus convallata Trel. – Mexico
Quercus copeyensis C.H.Mull. – # Costa Rica, Panama
Quercus cornelius-mulleri Nixon & K.P.Steele – Muller oak – # southwestern North America
Quercus corrugata Hook. – Mexico, Central America
Quercus dalechampii Ten. – southeastern Europe
Quercus deliquescens C.H.Mull. – Mexico
Quercus dentata Thunb. – daimyo oak – eastern Asia
Quercus depressipes Trel. – Davis Mountain oak – northern Mexico and Texas
Quercus deserticola Trel. – # Mexico
Quercus diversifolia Née – Mexico
Quercus douglasii Hook. & Arn. – blue oak – California
Quercus dumosa Nutt. – coastal scrub oak – # southern California, Baja California, Arizona
Quercus durata Jeps. – leather oak – # California
Quercus edwardsiae C.H.Mull. – Mexico
Quercus engelmannii Greene – Engelmann oak – # southern California, Baja California
Quercus estremadurensis O.Schwarz – Portugal, Spain, Morocco
Quercus fabrei Hance – Faber's oak – central to southern China
Quercus faginea Lam. – Portuguese oak – # southwestern Europe
Quercus frainetto Ten. — Hungarian oak — southeastern Europe
Quercus frutex Trel. – Mexico
†Quercus furuhjelmi — Eocene to Miocene - Alaska, Kazakhstan
Quercus gambelii Nutt. – Gambel oak – southwestern North America
Quercus garryana Douglas ex Hook. – Oregon white oak or Garry oak – western North America
Quercus germana Schltdl. & Cham. – Mexico
Quercus glabrescens Benth. – Mexico
Quercus glaucescens Bonpl. – encino blanco – Mexico
Quercus glaucoides M.Martens & Galeotti – # Mexico
Quercus greggii Trel. – # Mexico
Quercus griffithii Hook.f. & Thomson ex Miq. – southeast Asia
Quercus grisea Liebm. – gray oak – # southwestern North America
Quercus hartwissiana Steven – Strandzha oak – southeastern Bulgaria, northern Turkey, western Georgia, southwestern Russia
Quercus havardii Rydb. – Havard oak, shinnery oak, shin oak – south central North America
†Quercus hiholensis — Miocene — # Washington State
Quercus hinckleyi C.H.Mull. – Hinckley oak – # Texas, northwestern Mexico
Quercus ichnusae Mossa, Bacch. & Brullo – Sardinia
Quercus infectoria G.Olivier – Aleppo oak, Cyprus oak – southern Europe, southwestern Asia
Quercus insignis M.Martens & Galeotti – Mexico, Belize, Costa Rica, Guatemala, Panama
Quercus intricata Trel. – Coahuila scrub oak – # two isolated localities in west Texas, northern Mexico
Quercus invaginata Trel. – Mexico
Quercus john-tuckeri Nixon & C.H.Mull. – Tucker's oak – California
Quercus juergensenii Liebm. – Mexico
Quercus kotschyana O.Schwarz – Lebanon
Quercus laceyi Small – lacey oak – Edwards Plateau of Texas, northern Mexico
Quercus laeta Liebm. – Mexico
Quercus lancifolia Schltdl. & Cham. – southwestern North America, Mexico, South America
Quercus liebmannii Oerst. ex Trel. — Mexico
Quercus lobata Née – valley oak or California white oak – California
Quercus lusitanica Lam. – gall oak or Lusitanian oak – Iberia, North Africa
Quercus lyrata Walter – overcup oak – eastern North America
Quercus × macdonaldii Greene & Kellogg – California
Quercus macdougallii Martínez – Mexico
Quercus macranthera Fisch. & C.A.Mey. ex Hohen. – Caucasian oak or Persian oak – western Asia
Quercus macrocarpa Michx. – bur oak – eastern and central North America
Quercus magnoliifolia Née – Mexico
Quercus manzanillana Trel. – Mexico
Quercus margarettae — sand post oak — southeastern North America
Quercus martinezii C.H.Mull. – # Mexico
Quercus michauxii Nutt. – swamp chestnut oak – eastern North America
Quercus microphylla Née – Mexico
Quercus mohriana Buckley ex Rydb. – Mohr oak – # southwestern North America
Quercus mongolica Fisch. ex Ledeb. – Mongolian oak – eastern Asia
Quercus monnula Y.C.Hsu & H.Wei Jen – south-central China
Quercus montana Willd. – chestnut oak – eastern North America
Quercus muehlenbergii Engelm. – Chinkapin oak – eastern, central, and southwestern US, northern Mexico
Quercus ningqiangensis S.Z.Qu & W.H.Zhang – southeastern China
Quercus oblongifolia Torr. – Arizona blue oak, Southwestern blue oak, or Mexican blue oak – # southwestern U.S., northwestern Mexico
Quercus obtusata Bonpl. – Mexico
Quercus oglethorpensis W.H.Duncan – Oglethorpe oak – southeastern North America
Quercus oocarpa Liebm. – Mexico
Quercus opaca Trel. – Mexico
Quercus pacifica Nixon & C.H.Mull. – # Channel Islands, California
Quercus peduncularis Née – # Central America
Quercus perpallida Trel. – Mexico
Quercus petraea Liebl. – sessile oak, durmast oak – Europe, Anatolia
*Quercus petraea subsp. polycarpa Soó - Georgian oak - Austria to Iran and the Caucasus
*Quercus petraea subsp. pinnatiloba Menitsky - Lebanon-Syria, Turkey, South Caucasus
Quercus polymorpha Schltdl. & Cham. – Monterrey oak, Mexican white oak – # Mexico and extreme S. Texas
Quercus porphyrogenita Trel. – Mexico
Quercus potosina Trel. – Mexico
Quercus praeco Trel. – Mexico
Quercus pringlei Seemen ex Loes. – Mexico
Quercus prinoides Willd. – dwarf chinkapin oak – eastern North America
Quercus pubescens Willd. – downy oak or Italian oak – Europe, Anatolia
Quercus pungens Liebm. – sandpaper oak or pungens oak – southwestern U.S., Mexico
Quercus purulhana Trel. – Mexico, Central America
Quercus pyrenaica Willd. – Pyrenean oak – southwestern Europe
Quercus rekonis Trel. – Mexico
Quercus repanda Bonpl. – Mexico
Quercus resinosa Liebm. – Mexico
Quercus robur L. – pedunculate oak, English oak or French oak – Europe, West Asia
Quercus rugosa Née – netleaf oak or Rugosa oak – # southwestern U.S., northwestern Mexico
Quercus × schuettei Trel. — Schuette's oak — US, Canada
Quercus sebifera Trel. – # Mexico
Quercus segoviensis Liebm. – Mexico and northern Central America
Quercus serrata Murray – bao li – # China, Taiwan, Japan, Korea
Quercus shennongii C.C.Huang & S.H.Fu – southeastern China
Quercus shingjenensis Y.T.Chang – China
Quercus similis Ashe – swamp post oak – southeastern North America
Quercus sinuata Walter – bastard oak – southern US
Quercus sororia Liebm. – Mexico
Quercus stellata Wangenh. – post oak – eastern North America
Quercus striatula Trel. – Mexico
Quercus subspathulata Trel. – Mexico
Quercus supranitida C.H.Mull. – Mexico
Quercus tinkhamii C.H.Mull. — Mexico
Quercus toumeyi Sarg. — Toumey oak — # southwest New Mexico, southeastern Arizona, northern Mexico
Quercus tuberculata Liebm. — Mexico
Quercus turbinella Greene — turbinella oak, Arizona Blue Shrub oak, Shrub live oak or scrub live oak — # southwestern North America
Quercus vaseyana Buckley — Vasey oak — # southwestern North America
Quercus verde C.H.Mull. — Mexico
Quercus vicentensis Trel. — El Salvador, Guatemala, and southern Mexico
Quercus vulcanica Boiss. & Heldr. ex Kotschy — Kasnak oak — southwestern Asia
Quercus welshii R.A.Denham — havard oak, Utah sand oak, wavy leaf oak — # southwestern North America
Quercus wutaishanica Mayr — Liaoning oak — China, Mongolia
Quercus xylina Scheidw. — Mexico

file:Quercus hiholensis acorn UWBM 56470-3 Pigg & Wehr 2002 Plt2 fig16.png|thumb|right|upright|Quercus hiholensis acorn in matrix