| Year | Month | Day | Name of Colliery | First Name | Surname | Page |
| 1920 | January | 2 | Unknown (Hamilton area) | Andrew Duncan | Prosser | FAI notice and death certificate |
| 1920 | January | 8 | Hallside | John | McIntosh | Newspaper report - Lanarkshire pages (natural causes) |
| 1920 | January | 13 | Murdostoun | Francis | McNally | Newspaper report - Shotts pages |
| 1920 | January | 21 | Holytown | James | Skiffington |
Newspaper report - Bothwell pages |
| 1920 | January | 25 | Bridgeness | Joseph | Murray | Newspaper report - Lothians pages |
| 1920 | January | 29 | Greenfield | William | Stannage | Newspaper report - Hamilton pages |
| 1920 | January | 29 | Westrigg | John | McGarrity | Newspaper report - Lothians pages |
| Peter | Marshall | |||||
| George Ratcliffe | Sneddon | |||||
| 1920 | February | 5 | Woodside | Robert | McDonald | Newspaper report - Dalserf pages |
| 1920 | February | 5 | Riddochill | John | Sneddon | FAI record – NAS |
| 1920 | February | 16 | Greenfield | John | McFarlane | Newspaper report - Hamilton pages |
| 1920 | February | 19 | Gordon | George | Park | Newspaper report - Beath pages |
| 1920 | February | 28 | Bowhill | Matthew | Donaldson | (Natural Causes) Newspaper report - Auchterderran pages |
| 1920 | February | 25 | Dunnett Shale Mine | William | Crawford | FAI record – NAS |
| 1920 | March | 2 | Tower Mine | William | Murray | Newspaper report - Dumfriesshire pages |
| 1920 | March | 12 | Lochhead | Thomas | Buist | Newspaper report - Fife pages |
| 1920 | March | 16 | Easton | Samuel | Sweeney | Newspaper report - Lothians pages |
| 1920 | March | 20 | Bardykes | James | McKenna | Newspaper report - Lanarkshire pages |
| 1920 | March | 20 | Newton | William | Walker | Newspaper report - Lanarkshire pages |
| 1920 | March | 27 | Westwood | James | Torrance | Newspaper report - Lothians pages |
| 1920 | March | 30 | Shieldmains | John | Peebles | Ayrshire accidents |
| 1920 | April | 1 | Foulshiels | Jeremiah | Greeney | Newspaper report - Lothians pages |
| 1920 | April | 5 | Bellfield | James | Richardson | Newspaper report - Lanarkshire pages |
| 1920 | April | 13 | Garriongill | Stephen | Smith | Newspaper report - Cambusnethan pages |
| 1920 | April | 15 | Earnock | Morrison | Docherty | Newspaper report - Hamilton pages |
| 1920 | April | 26 | Bothwell Castle | Donald | McFarlane | Newspaper report - Bothwell Castle page |
| William | McFarlane | |||||
| Anthony | Nowasaytis | |||||
| Peter | McGinn | |||||
| 1920 | May | 11 | Rutherglen | Hugh | Martin | Newspaper report - Lanarkshire pages |
| 1920 | May | 26 | Brigghills | James | Robb | Newspaper report - Auchterderran pages |
| 1920 | May | 26 | Lassodie | William | Shoolbred | Newspaper report - Beath pages |
| 1920 | May | 27 | Dalbeath | Daniel | Kean | Newspaper report - Beath pages |
| 1920 | May | 30 | Minto | William | Galloway | Newspaper report - Auchterderran pages |
| 1920 | May | 30 | Dysart | John | Clark | Newspaper report - Fife pages |
| 1920 | June | 1 | Auchengeich | John | Marley | Newspaper report - Lanarkshire pages |
| James | Mooney | |||||
| 1920 | June | 11 | Prestongrange | William | Ramsay | Newspaper report - Lothians pages |
| 1920 | June | 13 | Blairhall | Peter | Armour | Newspaper report - Fife pages |
| 1920 | June | 18 | Balbardie | Colin | Murray | Newspaper report - Lothians pages |
| 1920 | June | 20 | Dalbeath | Thomas | Cowan | Newspaper report - Beath pages |
| 1920 | June | 21 | Blairenbathie | Robert | Walkinshaw | Newspaper report - Beath pages |
| 1920 | July | 1 | Blairadam | Charles | McHale | Newspaper report - Beath pages |
| 1920 | July | 14 | Lumphinnans | Thomas | Forrest | Newspaper report - Beath pages |
| 1920 | July | 18 | Polmaise Colliery | John | McConnell | Struck by stone (Fallin memorial list) |
| 1920 | August | 9 | Woodmuir | Hugh | Stewart | Newspaper report - Lothians pages |
| 1920 | August | 12 | Kames, Muirkirk | Thomas | Thomson | Newspaper Report - Muirkirk pages |
| 1920 | August | 28 | Herdshill | Andrew | McDowell | Newspaper report - Cambusnethan pages |
| 1920 | September | 3 | Bellfield | Walter | Baxter | Newspaper report - Lanarkshire pages |
| 1920 | September | 6 | Deans | William | Callendar | Newspaper report - Lothians pages |
| 1920 | September | 7 | Fauldhead | Matthew | Lindsay | Source – list published by Kirkconnel Parish Heritage Society |
| 1920 | September | 8 | Birkrigg | Alexander | Flannigan | Newspaper report - Dalserf pages |
| 1920 | September | 18 | Daldowie | John | M'Ghee | Newspaper report - Lanarkshire pages |
| 1920 | September | 20 | Blairmuckhill | John | Young | Gas explosion |
| 1920 | September | 24 | Bo'ness | Thomas | Grant | Newspaper report - Lothians pages |
| 1920 | September | 24 | Castlehill | James | Watson | Newspaper report - Lanarkshire pages |
| 1920 | September | 25 | Curledubs, Broxburn | Walter | Gilbert | Newspaper report - Lothians pages |
| 1920 | September | 26 | Bowhill | Catherine Marshall | Kerr | Newspaper report - Auchterderran pages |
| 1920 | September | 28 | Dumbreck | Donald | Macdonald | Newspaper report - Stirlingshire pages |
| 1920 | September | 29 | Foulshiels | Patrick | Lee | Newspaper report - Lothians pages |
| 1920 | October | 12 | Shale Mine, Deans | Alexander | Ellis | FAI record – NAS |
| 1920 | October | 13 | Kames | William Archibald | Dempster | Death certificate |
| 1920 | October | 16 | Shale Mine, Deans | Alexander | Fraser | FAI record – NAS |
| 1920 | November | 11 | Lady Ha' pit | Henry | Coulter | Ayrshire accidents |
| 1920 | November | 15 | Manor Powis | John | McGibbon | Newspaper report - Stirlingshire pages |
| 1920 | November | 23 | Kirkford | James | Smith | Newspaper report - Beath pages |
| 1920 | November | 28 | NK | James | Flannigan | Death cert |
| 1920 | November | 29 | Blackrigg | Andrew | Clifford | FAI record – NAS |
| 1920 | November | 30 | Nellie | John | Bain | Newspaper report - Auchterderran pages |
| 1920 | December | 7 | Carnock | James | Paterson | Newspaper report - Stirlingshire pages |
| 1920 | December | 19 | Polmaise Colliery | Michael | Kettrick | Fall of stone from roof (Fallin memorial list) |
| 1920 | December | 22 | Aitken | Thomas | Farry | Newspaper report - Beath pages |
| 1920 | December | 24 | Raith | Thomas | Forbes | Newspaper report - Beath pages |
| 1920 | December | 24 | Kirkford | George | Chapman | Newspaper report - Beath pages |
| 1920 | December | 30 | Muirhead | George | McCallum | Newspaper report - Shotts pages |