| OHIO | | CYMRU |
|---|
| | 1790 | |
| | | | |
| | | | |
| | |  | 1793-1818: Enclosing common land |
| | | | |
| 1796: The Welsh settle in Paddy's Run |  | | |
| | | | |
| | 1800 | |
| 1801: The Welsh settle in Welsh Hills |  | | |
| | | | |
| | | | |
| | 1810 | |
| 1812: The 1812 War |  | | |
| | |  | 1811: The Calvinistic Methodists establish a separate denomination |
| | |  | 1815: Depression in rural areas following the Napoleonic Wars |
| 1818: The Welsh settle in Jackson and Gallia |  | | |
| | |  | 1819: The war of the little Englishman (1819-1829) |
| | 1820 | |
| | | | |
| | | | |
| | | | |
| | | | |
| | | | |
| | 1830 | |
| 1833: The Welsh settle in Gomer |  | | |
| 1835: Edward Jones visits the settlement in Jackson/Gallia County |  | | |
| | |  | 1837: Y Teithiwr Americanaidd (The American Traveler) is published |
| | |  | 1839: B. W. Chidlaw publishes Yr American |
| | |  | 1839: More than 170 leave Cardiganshire from Aberaeron Harbor |
| | 1840 | |
| | |  | 1840: Ann Richards and her family emigrate to Ohio |
| 1842: The Tyn Rhos Chapel is established |  | | |
| 1846: William Bebb is elected the Governor of Ohio |  | | |
| 1848: The Welsh settle in Van Wert |  | | |
| | | | |
| | 1850 | |
| 1851: The Drych is published for the first time |  | | |
| | | | |
| 1854: The Jefferson Furnace Company is formed in Jackson County |  | | |
| | | | |
| | | | |
| | 1860 | |
| 1861: The American Civil War (1861-1865) |  | | |
| | | | |
| | | | |
| | | | |