| # | Dove’s Guide Entry | Grid Ref
 | Map |
|---|
| 2551 | Oaksey, Wiltshire, All Saints (GF).
6 (full-circle ring), 9–3–12 (501 kg) in G♯. | ST990936 | Map |
| 2552 | Oare, Somerset, Blessed Virgin Mary (GF).
3 (chime), 5–3–22 (302 kg) in D. | SS802473 | Map |
| 2553 | Oborne, Dorset, S Cuthbert New Church.
1 (chime), 1–1–18 (72 kg) in A. | ST653185 | Map |
| 2554 | Ockham, Surrey, All Saints (T).
6 (full-circle ring), 7 cwt (~360 kg) in B. Thu. | TQ066565 | Map |
| 2555 | Odd Rode, Cheshire, All Saints.
2 (chime), 2–1–13 (120 kg). | SJ824574 | Map |
| 2556 | Odell, Bedfordshire, All Saints.
6 (full-circle ring), 13–1–8 (677 kg) in F♯. Mon. | SP966580 | Map |
| 2557 | Offenham, Worcestershire, S Mary & S Milburgh (GF, S, T).
6 (full-circle ring), 10–3–2 (547 kg) in F♯. Tue 19:00. | SP053462 | Map |
| 2558 | Offton, Suffolk, S Mary (GF, T).
8 (full-circle ring), 8–1–18 (427 kg) in A. Tue. | TM066496 | Map |
| 2559 | Offwell, Devon, S Mary V.
6 (full-circle ring), 7–3–9 (398 kg) in A♭. | SY194995 | Map |
| 2560 | Old Bolingbroke, Lincolnshire, S Peter & S Paul (GF).
6 (full-circle ring), 12–2–23 (645 kg) in F♯. Wed 18:30. | TF349651 | Map |
| 2561 | Old Brampton, Derbyshire, S Peter & S Paul (S, T).
6 (full-circle ring), 12–0–9 (614 kg) in A♭. Mon. | SK336719 | Map |
| 2562 | Old Buckenham, Norfolk, All Saints.
6 (chime), 8–2–0 (432 kg). Ellacombe apparatus. | TM067914 | Map |
| 2563 | Old Clee, Lincolnshire, Christ Church.
1 (chime). | TA300091 | Map |
| 2564 | Old Cleeve, Somerset, S Andrew.
8 (full-circle ring), 18–1–6 (930 kg) in F. Mon 14:00. | ST040419 | Map |
| 2565 | Old Dalby, Leicestershire, S John Bapt (GF).
4 (full-circle ring), 9–2–2 (484 kg) in G. | SK673235 | Map |
| 2566 | Old Fletton, Cambridgeshire, S Margaret (GF, T).
5 (full-circle ring), 7–3–26 (406 kg) in A♭. | TL197970 | Map |
| 2567 | Old Hill, West Midlands, Holy Trinity.
8 (full-circle ring), 23–1–0 (1181 kg) in F. | SO955862 | Map |
| 2568 | Old Lakenham, Norfolk, S John Bapt & All Saints.
3 (chime), 4–0–22 (213 kg) in B. | TG233060 | Map |
| 2569 | Old Leake, Lincolnshire, S Mary (GF).
6 (full-circle ring), 11 cwt (~560 kg) in F♯. | TF407502 | Map |
| 2570 | Old Swinford, West Midlands, S Mary (T).
8 (full-circle ring), 10–3–12 (552 kg) in F♯. Ellacombe apparatus. | SO907831 | Map |
| 2571 | Old Warden, Bedfordshire, S Leonard (GF).
6 (full-circle ring), 9–0–22 (467 kg) in G. | TL136443 | Map |
| 2572 | Old Whittington, Derbyshire, S Bartholomew (T).
6 (full-circle ring), 5–0–20 (263 kg) in C. Fri. | SK384752 | Map |
| 2573 | Old Woking, Surrey, S Peter (T).
8 (full-circle ring), 17–0–18 (872 kg) in E. Wed. | TQ020568 | Map |
| 2574 | Oldham, Greater Manchester, S John Bapt, Hey.
1 (chime), in F. | SD955050 | Map |
| 2575 | Oldham, Greater Manchester, S Mary (T).
12 (full-circle ring) plus 6♭, 35–0–4 (1780 kg) in D♭. | SD927051 | Map |
| 2576 | Ollerton, Nottinghamshire, S Paulinus.
1 (chime), 3–0–23 (163 kg) in F. | SK664681 | Map |
| 2577 | Olveston, Gloucestershire, S Mary V (T).
8 (full-circle ring), 18–3–8 (956 kg) in F. Fri. | ST600872 | Map |
| 2578 | Ombersley, Worcestershire, S Andrew (T).
6 (full-circle ring), 16–2–4 (840 kg) in E. | SO844635 | Map |
| 2579 | Onchan, Isle of Man, S Peter, Conchan, Kirk Onchan.
2 (chime), 5–0–9 (258 kg) in D. Steel bell: Disused. | SC400781 | Map |
| 2580 | Openshaw, Greater Manchester, S Barnabas.
1 (chime), 1–0–24 (62 kg) in A♯. | SJ876975 | Map |
| 2581 | Orange, New South Wales, Australia, Holy Trinity.
8 (full-circle ring), 6–3–15 (350 kg) in B♭. Tue (confirm first) 18:00. | | Map |
| 2582 | Orcheston, Wiltshire, S Mary (GF).
3 (full-circle ring), 7–1–25 (380 kg) in B♭. | SU058456 | Map |
| 2583 | Ordsall, Greater Manchester, S Ignatius Centre (formerly S Ignatius).
1 U/R (full-circle ring), 9–0–6 (460 kg) in A. Unringable. | SJ818977 | Map |
| 2584 | Ordsall, Nottinghamshire, All Hallows (T).
6 (full-circle ring), 6–2–22 (340 kg) in A. Tue. | SK704797 | Map |
| 2585 | Orford, Cheshire, S Andrew.
1 (chime), 5–0–14 (260 kg). | SJ612912 | Map |
| 2586 | Ormesby, North Yorkshire, S Cuthbert (T).
8 (full-circle ring), 18–0–14 (921 kg) in E. Wed. | NZ530167 | Map |
| 2587 | Ormskirk, Lancashire, S Peter & S Paul.
8 (full-circle ring), 21–1–26 (1091 kg) in E♭. In the tower. Tue (3rd, 4th, 5th: 1st & 2nd are at Aughton, Christ Church). | SD412084 | Map |
| 2588 | Orpington, Greater London, Christ Church.
1 (chime). | TQ468649 | Map |
| 2589 | Orrell, Greater Manchester, S Luke.
1 (chime), 2–3–14 (146 kg). | SD530038 | Map |
| 2590 | Orton, Cumbria, All Saints (T).
8 (full-circle ring), 12–3–13 (654 kg) in F♯. Sat (2nd) 10:00. | NY622083 | Map |
| 2591 | Orwell, Cambridgeshire, S Andrew (GF).
8 (full-circle ring), 11–0–7 (562 kg) in F♯. | TL362505 | Map |
| 2592 | Osgathorpe, Leicestershire, S Mary V.
2 (chime), 9–3–26 (507 kg) in G. | SK431195 | Map |
| 2593 | Osmondthorpe, West Yorkshire, S Philip.
1 (chime), 2–0–4 (103 kg) in G. | SE331337 | Map |
| 2594 | Osmotherley, North Yorkshire, S Peter (GF, T).
4 (chime), 6–2–13 (336 kg) in B♭. | SE455971 | Map |
| 2595 | Ospringe, Kent, S Peter & S Paul.
8 (full-circle ring), 17–1–8 (880 kg) in F♯. Fri. | TR000603 | Map |
| 2596 | Ossett, West Yorkshire, Holy & Undivided Trinity.
15 (full-circle ring) plus 5♯, 27–1–25 (1396 kg) in D. Thu. | SE276211 | Map |
| 2597 | Ossington, Nottinghamshire, Holy Rood (GF).
6 (full-circle ring), 6–0–17 (313 kg) in B♭. | SK759651 | Map |
| 2598 | Ossington, Nottinghamshire, Holy Rood.
(other bells). | SK759651 | Map |
| 2599 | Oswaldtwistle, Lancashire, Immanuel (T).
8 (full-circle ring), 11–0–21 (568 kg) in G. Thu. | SD733267 | Map |
| 2600 | Oswaldtwistle, Lancashire, S Paul.
1 (chime), 2–0–6 (104 kg). | SD743275 | Map |