# List of road junctions in the United Kingdom: O

* 0–A
* B
* C
* D
* E
* F
* G
* H
* I–K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U–V
* W
* X–Z
This is part of the list of road junctions in the United Kingdom.
Many road junctions are named after pubs. For more information regarding the derivation of pub names see pub names.

## O

| Junction Name | Type | Location | Roads | Grid Reference | Notes |
| Oakfield Corner | | Amersham, Buckinghamshire | A416 Chesham Road B4441 Sycamore Road Hill Avenue | 51°40′37″N 0°36′27″W﻿ / ﻿51.67694°N 0.60750°W﻿ / 51.67694; -0.60750 | |
| Oakgrove Roundabout | | Monkston, Milton Keynes | H7 Chaffron Way V10 Brickhill Street | 52°02′15″N 0°42′33″W﻿ / ﻿52.03750°N 0.70917°W﻿ / 52.03750; -0.70917 | |
| Oakhill Roundabout | | Oakhill, Milton Keynes | H5 Portway V2 Tattenhoe Street | 52°01′09″N 0°48′33″W﻿ / ﻿52.01917°N 0.80917°W﻿ / 52.01917; -0.80917 | |
| Ober Corner | | Ober Heath, New Forest | unclass. unclass. | 50°49′51″N 1°35′50″W﻿ / ﻿50.83083°N 1.59722°W﻿ / 50.83083; -1.59722 | |
| Ockham Junction aka Stratford Bridge | | Ockham, Surrey | A3 Ripley By-pass B2215 Portsmouth road (formerly A3) B2039 Ockham Road | 54°06′31″N 0°27′17″W﻿ / ﻿54.10861°N 0.45472°W﻿ / 54.10861; -0.45472 | |
| Octon Crossroads | | North Yorkshire | B1249 Scarborough Road B1253 High Street | 54°06′31″N 0°27′17″W﻿ / ﻿54.10861°N 0.45472°W﻿ / 54.10861; -0.45472 | |
| Odsal Top | | Bradford, West Yorkshire | A641 Manchester Road A6177 Smiddles Lane | SE158306 | |
| Offington Corner | Roundabout | Worthing, West Sussex | A27 Crockhurst Hill A24 Findon Road A27/A24 Warren Road A2031 Offington Lane Goodwood Road | TQ 13255 05598 | |
| Offley Cross | Crossroads | Hitchin, Hertfordshire | A505 Carters Lane (aka Wibbly Wobbley Lane) | 51°56′30″N 0°18′23″W﻿ / ﻿51.94167°N 0.30639°W﻿ / 51.94167; -0.30639 | |
| Old Craighall | | Musselburgh, Scotland | A1 A720 City of Edinburgh Bypass B6415 Old Craighall Road | NT338707 | |
| Old Cross | Crossroads | Hertford, Hertfordshire | B158 Cowbridge B158 The Wash St Andrews Street | TL325127 | |
| Old Ford | Diamond Interchange | Old Ford, London | A12 East Cross Route (formerly A102(M)) B142 Wick Lane | 51°32′02″N 0°01′20″W﻿ / ﻿51.53389°N 0.02222°W﻿ / 51.53389; -0.02222 | Site of the historic ford along the Roman road from London to Essex (now mostly consisting of the A118 and then A12) |
| Old Inns Interchange | | Cumbernauld, North Lanarkshire | A80 A8011 B816 | NS770766 | |
| Old Malton Roundabout | | Malton, North Yorkshire | A64 A169 B1257 | SE801734 | |
| The Old Pond | Roundabout | Cheshunt, Hertfordshire | B176 Turner's Hill (formerly A10) B198 College Road (formerly A121) | 51°42′07″N 0°02′05″W﻿ / ﻿51.70194°N 0.03472°W﻿ / 51.70194; -0.03472 | |
| Old Street Roundabout | | The City, London | A501 City Road A5201 Old Street | 51°31′34″N 0°05′16″W﻿ / ﻿51.52611°N 0.08778°W﻿ / 51.52611; -0.08778 | |
| Old Wolverton Roundabout | | Wolverton, Milton Keynes | V5 Great Monks Street Stratford Road | 52°03′42″N 0°49′46″W﻿ / ﻿52.06167°N 0.82944°W﻿ / 52.06167; -0.82944 | |
| The Oldbury Interchange | | West Midlands | M5 J2 A4123 A4034 Asda supermarket access road | 52°29′33″N 2°01′07″W﻿ / ﻿52.49250°N 2.01861°W﻿ / 52.49250; -2.01861 | The supermarket access road is off the adjacent island which passes under the M5. |
| Ollerton Roundabout | | Ollerton, Nottinghamshire | A614 Blyth Road A614 Old Rufford Road A616 Worksop Road A616 Ollerton Road A6075 Mansfield Road Newark Road | 53°12′04″N 1°01′38″W﻿ / ﻿53.20111°N 1.02722°W﻿ / 53.20111; -1.02722 | |
| The Organ Crossroads | | Ewell, Surrey | A24 Ewell Bypass A240 London Road B2200 London Road | 51°21′15″N 0°14′46″W﻿ / ﻿51.35417°N 0.24611°W﻿ / 51.35417; -0.24611 | |
| Orrell Interchange | | Orrell, Wigan | M6 J26 M58 J6 A577 | 53°32′03″N 2°41′54″W﻿ / ﻿53.53417°N 2.69833°W﻿ / 53.53417; -2.69833 | |
| Orsett Cock | Roundabout Interchange | Orsett, Thurrock (formerly in Essex) | A13 A128 Brentwood Road A1013 Stanford Road (former A13) Brentwood Road (southern end, former A128) | TQ654812 | Named after the pub at the site of the former crossroads. |
| Ossie Garvin Roundabout | Roundabout Interchange | Hayes, LB Hillingdon | A312 The Parkway A4020 Uxbridge Road | 51°30′58″N 0°24′05″W﻿ / ﻿51.51611°N 0.40139°W﻿ / 51.51611; -0.40139 | Named after a local councillor who originally proposed the Hayes By-Pass, and died shortly before it was completed in 1992. |
| Ottershaw Roundabout | | Ottershaw, Surrey | A319 Chobham Road A320 Guildford Road B3121 Murray Road | TQ022639 | |
| The Oval, Kennington | | Kennington, London | A3 Kennington Park Road A202 Camberwell New Road A23 Brixton Road | TQ312776 | |
| Oxley Park Roundabout | | Westcroft, Milton Keynes | H6 Childs Way V2 Tattenhoe Street | 52°00′38″N 0°47′54″W﻿ / ﻿52.01056°N 0.79833°W﻿ / 52.01056; -0.79833 | |
| Oxford Circus | | London | A40 Oxford Street A4201 Regent Street | 51°30′55″N 0°08′31″W﻿ / ﻿51.51528°N 0.14194°W﻿ / 51.51528; -0.14194 | |
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