| Old Hutton | Old Hutton and Holmescales | Old Ideas |
| Old Isaacs | Old Jāsk | Old Jewish Man |
| Old Kilcullen | Old Kilpatrick | Old Langho |
| Old Laund Booth | Old Law | Old Leake |
| Old Lindley | Old Liwonde Boma | Old London Wasa |
| Old Louisiana | Old Lyme | Old Lyme, Connecticut |
| Old MacDonald Had a Farm | Old Malda | Old Maldah |
| Old Man | Old Man of Coniston | Old Man of Hoy |
| Old Man of the South Pole | Old Man On His Back Plateau | Old Man's Child |
| Old man's child | Old Man’s Fall | Old mans child |
| Old Mans Child | Old Mans Head | Old Mans Head (udde) |
| Old Marston | Old McDonald Had a Farm | Old Meldrum |
| Old Milverton | Old Money | Old Money (Simpsons) |
| Old Monroe | Old Monroe, Missouri | Old Moor |
| Old Mutual | Old Navy | Old Newton |
| Old Newton with Dagworth | Old Newton with Dagworth (lsjbot) | Old Noarlunga |
| Old Noll | Old Orchard Beach | Old Orchard Beach, Maine |
| Old Order River Brethren | Old Panamao | Old Park River |
| Old Possum's Book of Practical Cats | Old Post Office Pavilion | Old Providence Island |
| Old Pulteney Distillery | Old Radnor | Old Radnor (community) |
| Old Radnor (ort) | Old Rasmus | Old Rayne |
| Old Red Sandstone | Old Road | Old Road (ort i Antigua och Barbuda) |
| Old Road Town | Old Road Village | Old Romney |
| Old Romney (ort) | Old Romney (parish) | Old Sarum Castle |
| Old Saybrook | Old Saybrook, Connecticut | Old School |
| Old school | Old School Training | Old Skoöl of Rock |
| Old Skoöl Of Rock | Old Sodbury | Old Somerby |
| Old Somerby (ort) | Old Somerby (parish) | Old Songs vs. New Beats |
| Old Soul | Old Sparky | Old Speckled Hen |
| Old spice | Old Spice | Old Squaw Islands |
| Old St Mellons | Old St. Mellons | Old Star |
| Old Station | Old Station, Kalifornien | Old Stone |
| Old Stratford | Old Stratford and Drayton | Old Sukkertoppen |
| Old Swede's Church | Old Tabler Sverige | Old Tafo |
| Old Tappan | Old Tappan, New Jersey | Old Tebay |
| Old Time Hockey | Old Tjikko | Old Town |
| Old Town, Maine | Old Trafford | Old Trafford Cricket Ground |
| Old Vic | Old Wallow | Old Warden |
| Old Wardour Castle | Old Ways | Old Well |
| Old Weston | Old Weston (ort) | Old Weston (parish) |
| Old Windsor | Old Windsor (distriktshuvudort) | Old Wives Lake |
| Old Wives Lees | Old Woman River | Old Woman River (vattendrag i Kanada) |
| Old Woman’s Hill | Old Woodhall | Old Woughton |
| Old Yeller | Old Yeller klarar allt | Old, New, Borrowed and Blue |
| Old-fashioned-glas | Old-Fashioned-glas | Old-Fashionedglas |
| Oldaker, Jamie | Oldambt | Oldany Island |
| Oldarhian | Oldābāri | Oldén, Stig |
| Oldřiš | Oldřiš (ort i Tjeckien, lat 49,73, long 16,19) | Oldřiš (ort i Tjeckien, lat 49,78, long 16,01) |
| Oldřišov | Oldřich Černík | Oldřich Heidrich |
| Oldřich Kolář | Oldřich Lajsek | Oldřich Machač |
| Oldřich Macháč | Oldřich Nejedlý | Oldřich Rott |
| Oldřich Svojanovský | Oldřich Zábrodský | Oldřichov |
| Oldřichov (ort i Tjeckien, Olomouc) | Oldřichov (ort i Tjeckien, Södra Böhmen) | Oldřichov u České Lípy |
| Oldřichov v Hájích | Oldřichovice | Oldbawn |
| Oldberg | Oldbergssjön | Oldberrow |
| Oldboy | Oldbury | Oldbury (del av en befolkad plats) |
| Oldbury (grevskapshuvudort) | Oldbury (olika betydelser) | Oldbury Camp |
| Oldbury kärnkraftverk | Oldbury Nuclear Power Station | Oldbury nuclear power station |
| Oldbury on the Hill | Oldbury, Shropshire | Oldbury, Warwickshire |
| Oldbury, West Midlands | Oldbury-on-Severn | Oldbury-upon-Severn |
| Oldbury-upon-Severn (parish) | Oldcastle | Oldcastle (distrikt) |
| Oldcastle (ort) | Oldcastle (slott i Storbritannien, Wales) | Oldcastle, Cheshire |
| Oldcastle, Monmouthshire | Olde English | Olde English 800 |
| Olde English Bulldogge | Olde english bulldogge brasileiro | Olde English cyder |
| Olde Fort Erie | Olde, Emanuel | Oldebroek |
| Oldeen, Björn | Oldehore | Olden |
| Olden, Charles Smith | Oldenbarnevelt | Oldenbarnevelt, Johan van |
| Oldenbüttel | Oldenberg | Oldenberg, Hermann |
| Oldenbergiella | Oldenbergiella blascoi | Oldenbergiella brumalis |
| Oldenbergiella calcarifera | Oldenbergiella callosa | Oldenbergiella canalicata |
| Oldenbergiella pappi | Oldenbergiella seticerca | Oldenbergiella vernalis |
| Oldenborstel | Oldenburg | Oldenburg (1628) |
| Oldenburg (berg) | Oldenburg (efternamn) | Oldenburg (fartyg) |
| Oldenburg (Holstein) | Oldenburg (land) | Oldenburg (Oldenburg) |
| Oldenburg (olika betydelser 2) | Oldenburg (olika betydelser) | Oldenburg in Holstein |
| Oldenburg, Acke | Oldenburg, Claes | Oldenburg, Frederik |
| Oldenburg, Ivar | Oldenburg, Jerk | Oldenburg, Miriam |
| Oldenburg, Mount | Oldenburg, Theodor Vilhelm | Oldenburg-Sönderborg-Glücksburg |
| Oldenburgare | Oldenburger Land | Oldenburgia |
| Oldendorf | Oldendorf (Luhe) | Oldendorf, Schleswig-Holstein |
| Oldendorf, Stade | Oldenhütten | Oldenhorn |
| Oldenico | Oldenlandia | Oldenlandia abyssinica |
| Oldenlandia accedens | Oldenlandia acerosa | Oldenlandia acicularis |
| Oldenlandia acutangula | Oldenlandia acutidentata | Oldenlandia adscensionis |
| Oldenlandia aegialodes | Oldenlandia aemulans | Oldenlandia affinis |
| Oldenlandia alata | Oldenlandia albidopunctata | Oldenlandia albonervia |
| Oldenlandia amatymbica | Oldenlandia amboensis | Oldenlandia ampliflora |
| Oldenlandia angolensis | Oldenlandia angolensis var. hirsuta | Oldenlandia angustifolia |
| Oldenlandia angustifolia var. pedicellata | Oldenlandia aparine | Oldenlandia apoensis |
| Oldenlandia arborea | Oldenlandia arenaria | Oldenlandia arenarioides |
| Oldenlandia aretioides | Oldenlandia argillacea | Oldenlandia arguta |
| Oldenlandia aridosa | Oldenlandia arnottiana | Oldenlandia articularis |
| Oldenlandia aspera | Oldenlandia asperuliflora | Oldenlandia assimilis |
| Oldenlandia attenuata | Oldenlandia auricularia | Oldenlandia auricularia var. procumbens |
| Oldenlandia azurea | Oldenlandia balfourii | Oldenlandia banksii |
| Oldenlandia barbata | Oldenlandia barberi | Oldenlandia beddomei |
| Oldenlandia benguellensis | Oldenlandia benguetensis | Oldenlandia bicornuta |
| Oldenlandia biflora | Oldenlandia bodinieri | Oldenlandia bojeri |
| Oldenlandia bonincola | Oldenlandia borrerioides | Oldenlandia boscii |
| Oldenlandia bourdillonii | Oldenlandia brachiata | Oldenlandia brachypetala |
