Villes les plus peuplées de France démarrant par O
| Ville | Département | Population | Superficie en km² | Densité | Altitude |
| Orléans (45000-45100) | Loiret | 114167 | 27.48 | 4154 | 90-124 |
| Orange (84100) | Vaucluse | 29135 | 74.2 | 392 | 24-127 |
| Oullins (69600) | Rhône | 25152 | 4.4 | 5716 | 163-253 |
| Orvault (44700) | Loire-Atlantique | 24504 | 27.67 | 885 | 7-74 |
| Oyonnax (01100) | Ain | 22650 | 36.18 | 626 | 440-1082 |
| Orly (94310) | Val-de-Marne | 21395 | 6.69 | 3198 | 30-89 |
| Ozoir-la-Ferrière (77330) | Seine-et-Marne | 20268 | 15.58 | 1300 | 94-122 |
| Olivet (45160) | Loiret | 19583 | 23.39 | 837 | 89-109 |
| Osny (95520) | Val-d’Oise | 16236 | 12.52 | 1296 | 27-102 |
| Orsay (91400) | Essonne | 15966 | 7.97 | 2003 | 51-160 |
| Outreau (62230) | Pas-de-Calais | 14527 | 7.09 | 2048 | 2-96 |
| Olonne-sur-Mer (85340) | Vendée | 13618 | 45.61 | 298 | 0-49 |
| Ollioules (83190) | Var | 12774 | 19.89 | 642 | 0-520 |
| Oissel (76350) | Seine-Maritime | 11516 | 22.19 | 518 | 2-128 |
| Ostwald (67540) | Bas-Rhin | 11310 | 7.11 | 1590 | 139-144 |
| Onet-le-Château (12850) | Aveyron | 11084 | 40.2 | 275 | 524-631 |
| Orthez (64300) | Pyrénées-Atlantiques | 10982 | 45.86 | 239 | 38-185 |
| Oloron-Sainte-Marie (64400) | Pyrénées-Atlantiques | 10800 | 68.31 | 158 | 194-1380 |
| Obernai (67210) | Bas-Rhin | 10731 | 25.74 | 416 | 156-572 |
| Ormesson-sur-Marne (94490) | Val-de-Marne | 9904 | 3.41 | 2904 | 44-108 |
| Oignies (62590) | Pas-de-Calais | 9877 | 5.52 | 1789 | 23-33 |
| Ouangani (97670) | Mayotte | 9834 | 19.05 | 516 | – |
| Ouistreham (14150) | Calvados | 9381 | 9.95 | 942 | 0-32 |
| Onnaing (59264) | Nord | 8709 | 12.97 | 671 | 16-68 |
Les autres villes de France démarrant par O
Ob
Obenheim (67230), Oberbronn (67110), Oberbruck (68290), Oberdorf (68960), Oberdorff (57320), Oberdorf-Spachbach (67360), Oberentzen (68250), Obergailbach (57720), Oberhaslach (67280), Oberhausbergen (67205), Oberhergheim (68250), Oberhoffen-lès-Wissembourg (67160), Oberhoffen-sur-Moder (67240), Oberlarg (68480), Oberlauterbach (67160), Obermodern-Zutzendorf (67330), Obermorschwihr (68420), Obermorschwiller (68130), OberrÅ“Âœdern (67250), Obersaasheim (68600), Oberschaeffolsheim (67203), Obersoultzbach (67330), Obersteinbach (67510), Oberstinzel (57930), Obervisse (57220), Obies (59570), Objat (19130), Oblinghem (62920), Obrechies (59680), Obreck (57170), Obsonville (77890), Obterre (36290), Obtrée (21400)
Oc
Ocana (20117), Occagnes (61200), Occey (52190), Occhiatana (20226), Occoches (80600), Ochancourt (80210), Oches (08240), Ochey (54170), Ochtezeele (59670), Ocquerre (77440), Ocqueville (76450), Octeville-l’Avenel (50630), Octeville-sur-Mer (76930)
Od
Odars (31450), Odenas (69460), Oderen (68830), Odomez (59970), Odos (65310), Odratzheim (67520)
Oe
Oëlleville (88500), Oermingen (67970), Oeyregave (40300), Oeyreluy (40180)
Of
Offekerque (62370), Offemont (90300), Offendorf (67850), Offignies (80590), Offin (62990), Offlanges (39290), Offoy (60210), Offoy (80400), Offranville (76550), Offrethun (62250), Offroicourt (88500), Offwiller (67340)
Og
Ogenne-Camptort (64190), Oger (51190), Ogeu-les-Bains (64680), Ogéviller (54450), Ogliastro (20217), Ognes (02300), Ognes (51230), Ognes (60440), Ognéville (54330), Ognolles (60310), Ognon (60810), Ogy (57530)
Oh
Ohain (59132), Oherville (76560), Ohis (02500), Ohlungen (67590), Ohnenheim (67390)
Oi
Oigney (70120), Oigny (21450), Oigny (41170), Oigny-en-Valois (02600), Oingt (69620), Oinville-Saint-Liphard (28310), Oinville-sous-Auneau (28700), Oinville-sur-Montcient (78250), Oiron (79100), Oiry (51200), Oiselay-et-Grachaux (70700), Oisemont (80140), Oisilly (21310), Oisly (41700), Oison (45170), Oisseau (53300), Oisseau-le-Petit (72610), Oissery (77178), Oissy (80540), Oisy (02450), Oisy (58500), Oisy (59195), Oisy-le-Verger (62860), Oizé (72330), Oizon (18700)
Ol
Olargues (34390), Olby (63210), Olcani (20217), Oléac-Debat (65350), Oléac-Dessus (65190), Olemps (12510), Olendon (14170), Oletta (20232), Olette (66360), Olivese (20140), Olivet (53410), Olizy (51700), Olizy-Primat (08250), Olizy-sur-Chiers (55700), Ollainville (88170), Ollainville (91290), Ollans (25640), Ollé (28120), Olley (54800), Ollezy (02480), Ollières (74370), Ollières (83470), Ollières-sur-Eyrieux (07360), Olliergues (63880), Olloix (63450), Olmes (69490), Olmet (63880), Olmeta-di-Capocorso (20217), Olmeta-di-Tuda (20232), Olmet-et-Villecun (34700), Olmeto (20113), Olmi-Cappella (20259), Olmiccia (20112), Olmo (20290), Olonzac (34210), Ols-et-Rinhodes (12260), Oltingue (68480), Olwisheim (67170)
Om
Omblèze (26400), Omécourt (60220), Omelmont (54330), Omergues (04200), Omerville (95420), Omessa (20236), Omet (33410), Omex (65100), Omey (51240), Omicourt (08450), Omiécourt (80320), Omissy (02100), Omméel (61160), Ommeray (57810), Ommoy (61160), Omont (08430), Omonville (76730), Omonville-la-Petite (50440), Omonville-la-Rogue (50440), Omps (15290), Oms (66400)
On
Onans (25250), Onard (40380), Onay (70100), Oncieu (01230), Oncourt (88150), Oncy-sur-ecole (91490), Ondefontaine (14260), Ondes (31330), Ondres (40440), Ondreville-sur-Essonne (45390), Onesse-et-Laharie (40110), Oneux (80135), Ongles (04230), Onglières (39250), Onjon (10220), Onlay (58370), Onnion (74490), Onoz (39270), Ons-en-Bray (60650), Ontex (73310), Onville (54890), Onzain (41150)
Oo
Oô (31110), Oost-Cappel (59122)
Op
Opio (06650), Opoul-Périllos (66600), Oppède (84580), Oppedette (04110), Oppenans (70110), Oppy (62580), Optevoz (38460)
Or
Oraà s (64390), Oradour (15260), Oradour (16140), Oradour-Fanais (16500), Oradour-Saint-Genest (87210), Oradour-sur-Glane (87520), Oradour-sur-Vayres (87150), Orain (21610), Orainville (02190), Oraison (04700), Orbagna (39190), Orbais-l’Abbaye (51270), Orban (81120), Orbec (14290), Orbeil (63500), Orbessan (32260), Orbey (68370), Orbigny (37460), Orbigny-au-Mont (52360), Orbigny-au-Val (52360), Orçay (41300), Orcemont (78125), Orcenais (18200), Orcet (63670), Orcevaux (52250), Orchaise (41190), Orchamps (39700), Orchamps-Vennes (25390), Orches (86230), Orchies (59310), Orcier (74550), Orcières (05170), Orcinas (26220), Orcines (63870), Orcival (63210), Orconte (51300), Ordan-Larroque (32350), Ordiarp (64130), Ordizan (65200), Ordonnac (33340), Ordonnaz (01510), Ore (31510), Orègue (64120), Oreilla (66360), Orelle (73140), Oresmaux (80160), Organ (65230), Orgeans-Blanchefontaine (25120), Orgedeuil (16220), Orgeix (09110), Orgelet (39270), Orgères (35230), Orgères (61230), Orgères-en-Beauce (28140), Orgerus (78910), Orges (52120), Orgeux (21490), Orgeval (02860), Orgeval (78630), Orgibet (09800), Orglandes (50390), Orgnac-l’Aven (07150), Orgnac-sur-Vézère (19410), Orgon (13660), Orgueil (82370), Oricourt (70110), Orieux (65190), Orignac (65200), Origne (33113), Origne (53360), Orignolles (17210), Origny (21510), Origny-en-Thiérache (02550), Origny-le-Butin (61130), Origny-le-Roux (61130), Origny-le-Sec (10510), Origny-Sainte-Benoite (02390), Orin (64400), Orincles (65380), Oriocourt (57590), Oriol-en-Royans (26190), Oriolles (16480), Orion (64390), Oris-en-Rattier (38350), Orist (40300), Orival (16210), Orival (76500), Orléat (63190), Orleix (65800), Orliac (24170), Orliac-de-Bar (19390), Orliaguet (24370), Orliénas (69530), Orlu (09110), Orlu (28700), Orly-sur-Morin (77750), Ormancey (52200), Ormenans (70230), Ormersviller (57720), Ormes (10700), Ormes (27190), Ormes (45140), Ormes (51370), Ormes (71290), Ormes (86220), Ormes (89110), Ormes-et-Ville (54740), Ormesson (77167), Ormes-sur-Voulzie (77134), Ormoiche (70300), Ormoy (28210), Ormoy (70500), Ormoy (89400), Ormoy (91540), Ormoy-la-Rivière (91150), Ormoy-le-Davien (60620), Ormoy-lès-Sexfontaines (52310), Ormoy-Villers (60800), Ornacieux (38260), Ornaisons (11200), Ornans (25290), Ornes (55150), Ornex (01210), Ornézan (32260), Orniac (46330), Ornolac-Ussat-les-Bains (09400), Ornon (38520), Orny (57420), Oroër (60510), Oroix (65320), Oron (57590), Oroux (79390), Orphin (78125), Orpierre (05700), Orquevaux (52700), Orres (05200), Orret (21450), Orriule (64390), Orrouer (28190), Orrouy (60129), Orry-la-Ville (60560), Ors (59360), Orsan (30200), Orsanco (64120), Orsans (11270), Orsans (25530), Orschwihr (68500), Orschwiller (67600), Orsennes (36190), Orsinval (59530), Orsonnette (63340), Orsonville (78660), Ortaffa (66560), Ortale (20234), Orthevielle (40300), Orthoux-Sérignac-Quilhan (30260), Ortillon (10700), Ortiporio (20290), Orto (20125), Ortoncourt (88700), Orus (09220), Orval (18200), Orval (50660), Orvaux (27190), Orve (25430), Orveau (91590), Orveau-Bellesauve (45330), Orville (21260), Orville (36210), Orville (45390), Orville (61120), Orville (62760), Orvillers-Sorel (60490), Orvilliers (78910), Orvilliers-Saint-Julien (10170), Orx (40230)
Os
Osani (20147), Osches (55220), Osenbach (68570), Oslon (71380), Osly-Courtil (02290), Osmanville (14230), Os-Marsillon (64150), Osmery (18130), Osmets (65350), Osmoy (18390), Osmoy (78910), Osmoy-Saint-Valery (76660), Osne-le-Val (52300), Osnes (08110), Ossages (40290), Ossas-Suhare (64470), Osse (25360), Osse (35410), Osse-en-Aspe (64490), Osséja (66340), Osselle (25320), Ossen (65100), Ossenx (64190), Osserain-Rivareyte (64390), Ossès (64780), Ossey-les-Trois-Maisons (10100), Ossun (65380), Ossun-ez-Angles (65100), Ostabat-Asme (64120), Ostel (02370), Ostheim (68150), Osthoffen (67990), Osthouse (67150), Ostreville (62130), Ostricourt (59162)
Ot
Ota (20150), Othe (54260), Othis (77280), Ottange (57840), Ottersthal (67700), Otterswiller (67700), Ottmarsheim (68490), Ottonville (57220), Ottrott (67530), Ottwiller (67320)
Ou
Ouagne (58500), Ouainville (76450), Ouanary (97380), Ouanne (89560), Ouarville (28150), Oubeaux (14230), Ouchamps (41120), Ouches (42155), Oucques (41290), Oudalle (76430), Oudan (58210), Oudeuil (60860), Oudezeele (59670), Oudincourt (52310), Oudon (44521), Oudrenne (57110), Oudry (71420), Oueilloux (65190), Ouerre (28500), Ouessant (29242), Ouézy (14270), Ouffières (14220), Ouge (70500), Ouges (21600), Ougney (39350), Ougney-Douvot (25640), Ougny (58110), Ouhans (25520), Ouides (43510), Ouillon (64160), Ouilly-du-Houley (14590), Ouilly-le-Tesson (14190), Ouilly-le-Vicomte (14100), Oulches (36800), Oulches-la-Vallée-Foulon (02160), Oulchy-la-Ville (02210), Oulchy-le-Château (02210), Oulins (28260), Oulles (38520), Oulmes (85420), Oulon (58700), Ounans (39380), Oupia (34210), Our (39700), Ourches (26120), Ourches-sur-Meuse (55190), Ourde (65370), Ourdis-Cotdoussan (65100), Ourdon (65100), Ourouër (58130), Ourouer-les-Bourdelins (18350), Ouroux (69860), Ouroux-en-Morvan (58230), Ouroux-sous-le-Bois-Sainte-Marie (71800), Ouroux-sur-Saône (71370), Oursbelille (65490), Oursel-Maison (60480), Ourton (62460), Ourville-en-Caux (76450), Ousse (64320), Ousse-Suzan (40110), Oussières (39800), Ousson-sur-Loire (45250), Oussoy-en-Gâtinais (45290), Oust (09140), Ousté (65100), Oust-Marest (80460), Outarville (45480), Outines (51290), Outrebois (80600), Outremécourt (52150), Outrepont (51300), Outriaz (01430), Ouvans (25530), Ouveillan (11590), Ouve-Wirquin (62380), Ouville (50210), Ouville-l’Abbaye (76760), Ouville-la-Bien-Tournée (14170), Ouville-la-Rivière (76860), Ouvrouer-les-Champs (45150), Ouzilly (86380), Ouzouer-des-Champs (45290), Ouzouer-le-Doyen (41160), Ouzouer-le-Marché (41240), Ouzouer-sous-Bellegarde (45270), Ouzouer-sur-Loire (45570), Ouzouer-sur-Trézée (45250), Ouzous (65400)
Ov
Ovanches (70360), Ovillers-la-Boisselle (80300)
Ox
Oxelaëre (59670)
Oy
Oyé (71610), Oye-et-Pallet (25160), Oye-Plage (62215), Oyes (51120), Oyeu (38690), Oyré (86220), Oyrières (70600), Oysonville (28700), Oytier-Saint-Oblas (38780)
Oz
Oz (38114), Ozan (01190), Oze (05400), Ozenay (71700), Ozenx-Montestrucq (64300), Ozerailles (54150), Ozeville (50310), Ozières (52700), Ozillac (17500), Ozoir-le-Breuil (28200), Ozolles (71120), Ozon (07370), Ozon (65190), Ozouer-le-Voulgis (77390), Ozourt (40380)