Kenneth R Marks updated his Ontario newspaper listing, as of 5 July 2021, at https://theancestorhunt.com/blog/ontario-online-historical-newspapers-summary/ .
Most of the new material is from Canadiana.ca. The papers with more than 100 issues added are —
| Location | Newspaper | Issues |
|---|---|---|
| Athens | The Athens Reporter (1915-1922 or 1923) | 279 |
| Athens | The Athens reporter & County of Leeds advertiser (1889-1915) | 1092 |
| Atwood | The Bee (1890-1924?) | 100 |
| Belleville | The Weekly Ontario and Bay of Quinte chronicle (1913-1921) | 367 |
| Brantford | Brantford Daily Courier (1913-1918_ | 1554 |
| Goderich | Huron signal (1848-1890) | 1460 |
| Guelph | Guelph Evening Mercury (1867-1875 or 1876) | 1509 |
| Hamilton | Hamilton Times (1892-1912) | 592 |
| Kingston | Queen’s University journal (1893- 191-) | 234 |
| Kingston | Queen’s College journal (1873-1893) | 177 |
| Listowei | Listowel Standard (1878-1882) | 233 |
| London | London Evening Advertiser (1922-1936) | 262 |
| London | The London evening free press (1911-1978) | 120 |
| London | London Advertiser (1880-1922) | 114 |
| Mildmay | The Mildmay gazette (1895-1957) | 620 |
| St. Catherines | The Evening journal (1859-1920) | 170 |
| Toronto | The Weekly Mail (1872-1880) | 300 |
| Toronto | The Toronto world (1880 or 1881-1921) | 2206 |
| Toronto | The Knox College monthly and Presbyterian magazine (1887-1896) | 103 |
| Toronto | The Toronto weekly mail (1880-1895) | 103 |
| Waterdown | The Waterdown Review (1918-1977?) | 298 |
| Watford | Watford Guide-Advocate (1906-1925) | 845 |