| Photo | Surname | Other names | Place | Type |
| 0600 | O’BOYLE | Patrick James | Swindon | Gravestone |
| Text | O’BRIEN | Honora (Mrs Englefield, Mrs Howard) | Wootton Bassett | Aubrey Pages |
| 032 | O’BRIEN | John | Spean Bridge | Memorial |
| 0019 | O’CONNELL | Swindon | War Memorial |
| 0226 | O’NEAL | Edna C. (nee Day) | Swindon | Gravestone |
| 0226 | O’NEAL | William J. A. | Swindon | Gravestone |
| 0558 | O’NEILL | Vivienne | Swindon | Plaque |
| 0019 | OAKES | L. | Swindon | War Memorial |
| 0335 | OAKFORD | Charles Romain | Swindon | Gravestone |
| 0335 | OAKFORD | Jane | Swindon | Gravestone |
| 150 | OAKLEY | Elsie Sophia | Ashton Keynes | Gravestone |
| 0767 | OAKLEY | Margaret | Swindon | Plaque |
| 0769 | OAKLEY | Norman James | Swindon | Plaque |
| 0768 | OAKLEY | Sidney James | Swindon | Plaque |
| 0413 | OAKLEY-BROWN | V. | Purton | War Memorial |
| 0071 | OAKSEY | Ralph de | Draycot Cerne | Aubrey |
| 007 | OAKSHOTT | Valerie Anne Doreen (nee Vlasto) | Little Bedwyn | Gravestone |
| 081 | OATLEY | Daniel | West Lavington | Gravestone |
| 030 | OATLEY | F. A. | Ashton Keynes | Graveyard Plan |
| 030 | OATLEY | Julia | Ashton Keynes | Graveyard Plan |
| 341 | OATLEY | Julia | Ashton Keynes | Gravestone |
| 030 | OATLEY | S. | Ashton Keynes | Graveyard Plan |
| 081 | OATLEY | Sarah Sainsbury (nee Shore) | West Lavington | Gravestone |
| 037 | OATLEY | W. | Biddestone | War Memorial |
| D001 | OATLEY | William | Bromham | Roll of Honour |
| 0032 | OATRIDGE | Daniel | Tetbury | Memorial |
| 0032 | OATRIDGE | Margaret | Tetbury | Memorial |
| 0050 | OATRIDGE | Mary | Tetbury | Memorial |
| 0033 | OATRIDGE | Simon | Tetbury | Memorial |
| 0046 | OATRIDGE | Simon | Tetbury | Memorial |
| 0258 | OATWAY | Alfred William | Swindon | Gravestone |
| 0258 | OATWAY | Mary Ann | Swindon | Gravestone |
| 00113 | O'BRIEN | H. F. | Swindon |
| 0058 | OCKWELL | A. E. | Swindon | Gravestone |
| 0104 | OCKWELL | Albert William | Swindon | Gravestone |
| 622 | OCKWELL | Arthur Dennis | Broad Blunsdon | Gravestone |
| 622 | OCKWELL | Beatrice Ellen | Broad Blunsdon | Gravestone |
| 0374 | OCKWELL | Charles | Purton | Gravestone |
| 704 | OCKWELL | Charles Edward | Broad Blunsdon | Gravestone |
| D181 | OCKWELL | Christopher | Purton | War Memorial |
| D181 | OCKWELL | Christopher T. | Purton | War Memorial |
| 0374 | OCKWELL | Dorothy Winifred | Purton | Gravestone |
| 0104 | OCKWELL | Edith Maud | Swindon | Gravestone |
| 0068 | OCKWELL | Edward | Swindon | Gravestone |
| D181 | OCKWELL | Elsie | Purton | War Memorial |
| 624 | OCKWELL | Esme Violet | Broad Blunsdon | Gravestone |
| 0212 | OCKWELL | H. | Highworth | War Memorial |
| 0068 | OCKWELL | Jane | Swindon | Gravestone |
| 0374 | OCKWELL | Myra | Purton | Gravestone |
| 0374 | OCKWELL | Peter | Purton | Gravestone |
| 704 | OCKWELL | Rose Kate | Broad Blunsdon | Gravestone |
| 621 | OCKWELL | Royston Arthur | Broad Blunsdon | Gravestone |
| 0021 | OCKWELL | Thomas | Purton | War Memorial |
| 0178 | O'CONNELL | Delia Bridget | Swindon | Gravestone |
| 0178 | O'CONNELL | Gerald Patrick | Swindon | Gravestone |
| Text | ODECOMBE | William | Brinkworth | Rectors List |
| 170 | O'DELL | B. | West Lavington | Roll of Honour |
| 0019 | ODEY | J. H. | Swindon | War Memorial |
| 0798 | ODEY | Leonard C. | Swindon | Gravestone |
| 190 | ODEY | Mildred Irene | Collingbourne Ducis | Gravestone |
| 014 | O'DWYER | Mary Josephine | Norton | Gravestone |
| 078 | ODY | Ann | Malmesbury | Memorial |
| 360+ | ODY | Ann | Lydiard Tregoze | Gravestone |
| 308+ | ODY | Arabella | Lydiard Tregoze | Gravestone |
| 041+ | ODY | Arabella | Lydiard Tregoze | Gravestone |
| 029 | ODY | E. | Dauntsey | War Memorial |
| 308+ | ODY | Elizabeth | Lydiard Tregoze | Gravestone |
| 041+ | ODY | Elizabeth | Lydiard Tregoze | Gravestone |
| 042 | ODY | Elizabeth | Lydiard Tregoze | Gravestone |
| D060 | ODY | Elizabeth Joanna | Oaksey | Gravestone |
| 028 | ODY | Elton | Brinkworth | War Memorial |
| 0121 | ODY | Faith Muriel | Hankerton | Gravestone |
| 042 | ODY | Frank | Lydiard Tregoze | Gravestone |
| D047 | ODY | George | Christian Malford | Gravestone |
| 308+ | ODY | George | Lydiard Tregoze | Gravestone |
| 361 | ODY | George | Lydiard Tregoze | Gravestone |
| 373+ | ODY | George | Lydiard Tregoze | Gravestone |
| 041+ | ODY | George | Lydiard Tregoze | Gravestone |
| 042 | ODY | George | Lydiard Tregoze | Gravestone |
| 0739 | ODY | George J. | Purton | Gravestone |
| D017 | ODY | Harold Walter | Oaksey | Gravestone |
| 359+ | ODY | Jane | Lydiard Tregoze | Gravestone |
| D028 | ODY | John | Lydiard Millicent | Gravestone |
| D028 | ODY | John | Lydiard Millicent | Gravestone |
| 0121 | ODY | John Collingbourne | Hankerton | Gravestone |
| 0739 | ODY | Kate Eliza | Purton | Gravestone |
| D047 | ODY | Katherine | Christian Malford | Gravestone |
| 0383 | ODY | Lucy Maria | Wroughton | Gravestone |
| D028 | ODY | Maria | Lydiard Millicent | Gravestone |
| 359+ | ODY | Mary | Lydiard Tregoze | Gravestone |
| 373+ | ODY | Mary | Lydiard Tregoze | Gravestone |
| 0101 | ODY | Mary | Purton | Gravestone |
| 017 | ODY | Mary Jane | Upper Waterhay, Leigh | Gravestone |
| 308+ | ODY | Mary Jane | Lydiard Tregoze | Gravestone |
| 041+ | ODY | Mary Jane | Lydiard Tregoze | Gravestone |
| 0383 | ODY | Nelson | Wroughton | Gravestone |
| D060 | ODY | Nicholas Walter | Oaksey | Gravestone |
| 357+ | ODY | Noah | Lydiard Tregoze | Gravestone |
| 358+ | ODY | Noah | Lydiard Tregoze | Gravestone |
| 226+ | ODY | Noah | Dauntsey | Gravestone |
| D031 | ODY | Olive May | Wroughton | Gravestone |
| 029 | ODY | R. | Dauntsey | War Memorial |
| 078 | ODY | Samwell | Malmesbury | Memorial |
| 357+ | ODY | Sarah | Lydiard Tregoze | Gravestone |
| 0593+ | ODY | Sarah Ann | Purton | Gravestone |
| 0101 | ODY | Thomas | Purton | Gravestone |
| 0001 | ODY | Thomas | Appleford | Gravestone |
| D023 | ODY | Vivian | Leigh | War Memorial |
| 013+ | ODY | Vivian | Upper Waterhay, Leigh | War Memorial |
| 0293 | ODY | W. J. | Crudwell | War Memorial |
| 0593+ | ODY | William | Purton | Gravestone |
| 0594+ | ODY | William | Purton | Gravestone |
| 017 | ODY | Young | Upper Waterhay, Leigh | Gravestone |
| Text | ODY | Christian Malford | Aubrey pages |
| 057 | OFFER | Anna | Imber | Gravestone |
| 168 | OFFER | Dorothy May | Potterne | Book of Remembrance |
| 159 | OFFER | Ernest William | Potterne | Book of Remembrance |
| 014 | OFFER | Johannis | Imber | Memorial |
| 057 | OFFER | John | Imber | Gravestone |
| 150 | OFFER | Ronald George | Potterne | Book of Remembrance |
| 146 | OFFER | W. | Potterne | War Memorial |
| 0437 | OFFLEY | Gavin William | Swindon | Gravestone |
| 189 | OFFYNTON | Robert de | Chilton Foliat | Rectors |
| 094 | OFTEN | William de | Orcheston St. Mary | Rector |
| 104 | OGBOURNE | Edna C. S. | Wootton Bassett | Gravestone |
| 104 | OGBOURNE | Reginald V. | Wootton Bassett | Gravestone |
| D146 | OGDEN | Ellen Doreen Mabel | Swindon | Plaque |
| D067 | OGDEN | Helena B. | Enford | Gravestone |
| 039 | OGDEN | W. | Orcheston St. Mary | Gravestone |
| 0452 | O'HEA | Adrian Ralph | Swindon | Gravestone |
| 0453 | O'HEA | Edythe Roweva | Swindon | Gravestone |
| 0452 | O'HEA | Mary Anna | Swindon | Gravestone |
| D029 | OKE | Geoffrey Alan | Swindon | Gravestone |
| 003 | OKE | Robertus | Everleigh | Rector |
| Text | OKEBORN | Johannis de | Winterbourne Monkton | Vicar |
| 007 | OKEBORNE | William de | Bishopstone | Vicars List |
| 152 | O'KEEFE | John Michael | Fovant | Gravestone |
| 152 | O'KEEFE | Winifred Mary | Fovant | Gravestone |
| Text | OLDESWORTH | Thomas | Liddington | Vicars |
| 053 | OLDFIELD | D. L. | Cowley | Gravestone |
| Text | OLDFIELD | John | Bishopstone | Aubrey book (Notes) |
| 053 | OLDFIELD | P. J. | Cowley | Gravestone |
| 215+ | OLDFIELD | Thomas Wilson | Potterne | Stained Glass |
| 0207 | OLDHAM | Bertha | Swindon | Gravestone |
| D020 | OLDKNOW | A. F. | Enford | Gravestone |
| D021 | OLDKNOW | Elizabeth Sarah | Enford | Gravestone |
| 0125 | OLDMAN | Hugh Russell | Purton | Memorial |
| 1052 | OLDMAN | Hugh Russell | Purton | Gravestone |
| 1052 | OLDMAN | Norah Elizabeth | Purton | Gravestone |
| 031 | OLDMEADOW | Joan | Ashton Keynes | Bell Appeal Donators |
| 0292 | O'LEARY | C. H. | Wroughton | Gravestone |
| 0468 | O'LEARY | Ernest Arthur | Wroughton | Gravestone |
| 0468 | O'LEARY | Phyllis Browen Louise | Wroughton | Gravestone |
| 0469 | O'LEARY | Violet Amelia | Wroughton | Gravestone |
| D14 | OLIPHANT | J. B. | Great Somerford | Plaque |
| 177 | OLIVER | Dorothy | Wanborough | Gravestone |
| 066+ | OLIVER | Edgar | Corston | Gravestone |
| 039 | OLIVER | Edith | Wilton | Notice |
| 11 | OLIVER | Elizabeth Ann | Hilperton | Memorial |
| 066+ | OLIVER | Florence Annie | Corston | Gravestone |
| 177 | OLIVER | Harold | Wanborough | Gravestone |
| 11 | OLIVER | Harry | Hilperton | Memorial |
| 0470 | OLIVER | John | Stratton St. Margaret | Gravestone |
| 0039 | OLIVER | John Keith | Warkleigh | Rector |
| 094 | OLIVER | Richard | Orcheston St. Mary | Rector |
| 027 | OLIVER | Ronald | Wootton Bassett | Memorial |
| 0470 | OLIVER | Sarah | Stratton St. Margaret | Gravestone |
| 131 | OLIVER | W. | Fovant | Gravestone |
| Text | OLIVER | Calne | Aubrey pages |
| 224+ | OLIVIER | Henry S. | Potterne | Stained Glass |
| 212+ | OLIVIER | Henry Stephen | Potterne | Stained Glass |
| 213+ | OLIVIER | Henry Stephen | Potterne | Stained Glass |
| 188 | OLIVIER | John | Potterne | Memorial |
| 224+ | OLIVIER | Mary | Potterne | Stained Glass |
| 0231 | OLLEV | John | Swindon | Gravestone |
| D009 | OLLIVER | Alice Jane | Shrivenham | Memorial |
| D008 | OLLIVER | Henry Charles Eaton | Shrivenham | Memorial |
| 0271 | OLSON | F. N. | Sutton Veny | War Memorial |
| 0016 | OLSSON | F. N. | Sutton Veny | Gravestone |
| 001 | OLVER | Stanley Edwin Linley | Wilcot | Vicar |
| Text | OMER | Swindon | Aubrey book |
| 003 | O'NEALE | Dorothea | Wootton Rivers | Gravestone |
| 061+ | O'NEALE | Dorothea | Wootton Rivers | Gravestone |
| 006 | O'NEALE | Dorothy | Wootton Rivers | Gravestone |
| 067 | O'NEALE | Frances | Wootton Rivers | Gravestone |
| 006 | O'NEALE | John | Wootton Rivers | Gravestone |
| 061+ | O'NEALE | Mary | Wootton Rivers | Gravestone |
| 067 | O'NEALE | Philip | Wootton Rivers | Gravestone |
| 002 | O'NEALE | William | Wootton Rivers | Gravestone |
| 003 | O'NEALE | William | Wootton Rivers | Gravestone |
| 006 | O'NEALE | William | Wootton Rivers | Gravestone |
| 061+ | O'NEALE | William | Wootton Rivers | Gravestone |
| 0690 | ONSLOW | Albert Henry | Swindon | Gravestone |
| 031 | ONSLOW | Eileen | Ashton Keynes | Bell Appeal Donators |
| 0690 | ONSLOW | Elsie May | Swindon | Gravestone |
| 031 | ONSLOW | Roger | Ashton Keynes | Bell Appeal Donators |
| 028 | ORAM | Eva | Orcheston St. Mary | Gravestone |
| D003+ | ORAM | G. | Westport | War Memorial |
| 0050 | ORAM | Henry | Manningford Bruce | War Memorial |
| 026+ | ORAM | Jane | Orcheston St. Mary | Gravestone |
| D161 | ORAM | Stephen John | Cricklade | Vicars |
| 130 | ORAM | T. H. | Orcheston St. Mary | War Memorial |
| 026+ | ORAM | Thomas | Orcheston St. Mary | Gravestone |