| Birth | 10 Aug 1821 | Sandusky, Huron County, Ohio | | | |
| Miscellaneous | Abt 1831 | Sandusky, Erie County, Ohio | | | |
| Occupation | Abt 1835 | Sandusky, Huron, Ohio, United States | | | |
| Occupation | Bef 1837 | employee of Seymour & Bool, a trading establisment - Saint Louis, Saint Louis City, Missouri | | | |
| Residence | 1837 | returning home after the firm he was working for in St Louis failed in the panic of 1837 - Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 1838 | Philadelphia, Philadelphia County, Pennsylvania | | | |
| Residence | Abt Jan 1839 | returning home from Philadelphia after the packet line failed - Sandusky, Erie County, Ohio | | | |
| Occupation | Abt May 1839 | employee of E W Clark & Company a banking house - Philadelphia, Philadelphia County, Pennsylvania | | | |
| Occupation | 1842 | full partner in E W Clark & Co bank firm - Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | Bef 1844 | Meadville, Crawford County, Pennsylvania | | | |
| Marriage | 1844 | Lexington, Fayette County, Kentucky - Dorothea Elizabeth "Dora, Lizzie" ALLEN | | | |
| Miscellaneous | 8 Jan 1851 | Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | 3 Jun 1853 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 6 Apr 1854 | Portsmouth, Rockingham County, New Hampshire | | | |
| Miscellaneous | 21 Apr 1854 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 26 Oct 1854 | received a letter from his brother with a draft from Flynt. Letter was written - Cincinnati, Hamilton County, Ohio | | | |
| Miscellaneous | 27 Oct 1854 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 9 Nov 1854 | Huntsville, Logan County, Ohio | | | |
| Miscellaneous | 14 Nov 1854 | Peoria, Peoria County, Illinois | | | |
| Miscellaneous | 17 Nov 1854 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 20 Nov 1854 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 29 Nov 1854 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 20 Dec 1854 | Fort Wayne, Allen County, Indiana | | | |
| Miscellaneous | 31 May 1855 | Paducah, McCracken County, Kentucky | | | |
| Miscellaneous | 5 Jun 1855 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 11 Jun 1855 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 6 Jul 1855 | received a letter from his brother-in-law Moorhead on his arrival here - Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 24 Jul 1855 | Saint Catharines, Ontario, Canada | | | |
| Miscellaneous | 17 Aug 1855 | New York City, New York County, New York | | | |
| Miscellaneous | 19 Aug 1855 | Astor House, New York City, New York County, New York | | | |
| Miscellaneous | 3 Sep 1855 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 19 Nov 1855 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 23 Apr 1856 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 3 May 1856 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | Bef 7 May 1856 | visiting family - Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 7 May 1856 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 23 Jun 1856 | New York City, New York County, New York | | | |
| Miscellaneous | 27 Jun 1856 | New York, New York County, New York | | | |
| Miscellaneous | 30 Jun 1856 | Boston, Suffolk County, Massachusetts | | | |
| Miscellaneous | 25 Aug 1856 | Boston, Suffolk County, Massachusetts | | | |
| Miscellaneous | 9 Jan 1857 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 17 Jan 1857 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 30 Jan 1857 | received a letter from his father after hearing of the death of Jay's son Pitt. Letter was written - Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 14 Feb 1857 | Boston, Suffolk County, Massachusetts | | | |
| Miscellaneous | 6 Mar 1857 | Boston, Suffolk County, Massachusetts | | | |
| Miscellaneous | 13 Mar 1857 | Boston, Suffolk County, Massachusetts | | | |
| Miscellaneous | 14 Mar 1857 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 14 Mar 1857 | 's father was visiting with him & his family - Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | 27 Mar 1857 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 23 Apr 1857 | Boston, Suffolk County, Massachusetts | | | |
| Miscellaneous | 20 Jul 1857 | New York, New York County, New York | | | |
| Retirement | 1858 | Philadelphia, Philadelphia County, Pennsylvania | | | |
| Residence | 20 Jun 1860 | & was a farmer - Cheltenham, Montgomery County, Pennsylvania | | | |
| Occupation | 1 Jan 1861 | founder & partner with Wm G Moorhead in the bank Jay Cooke & Co of Philadelphia - Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | 17 Jul 1861 | Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | 26 Jul 1861 | Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | 29 Jul 1861 | & his brother spoke with the wealthy man of the city & they obtained a guarantee for $1, 500,000 - Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | Jul 1861 | Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | 14 Jun 1862 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | Aft Jun 1865 | & the firm of Jay Cooke & Co established a branch - Washington, District of Columbia, United States | | | |
| Miscellaneous | Aft 1865 | & his bank financed the construction of the Northern Pacific Railway | | | |
| Miscellaneous | 1 Jan 1866 | & the firm of Jay Cooke & Co established a branch - New York , New York County, New York | | | |
| Miscellaneous | 9 Jan 1866 | Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | 1867 | his brother Henry & sister-in-law had property including their mansion put in trust in Jay's name - Georgetown, District of Columbia | | | |
| Residence | Abt 1867 | Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | Jan 1868 | gave his worth at this time at over $2,000,000 - Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | | purchased the island and built a mansion on it - Gibraltar Island, Ottawa County, Ohio | | | |
| Miscellaneous | 1 Jan 1870 | | | | |
| Miscellaneous | 2 Apr 1870 | Washington, District of Columbia | | | |
| Residence | 18 Jul 1870 | & was a banker - Cheltenham, Montgomery County, Pennsylvania | | | |
| Miscellaneous | 25 Nov 1870 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 1 Dec 1870 | London, England | | | |
| Miscellaneous | 3 Dec 1870 | London, England | | | |
| Miscellaneous | 6 Dec 1870 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | 17 Dec 1870 | Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | 1 Jan 1871 | & the firm Jay Cooke & Co took an interest in a banking house with new partners & interests - London, England | | | |
| Miscellaneous | 19 Jan 1871 | Sandusky, Erie County, Ohio | | | |
| Miscellaneous | Abt Jul 1872 | forced the President of the Northern Pacific Railroad out J Gregory Smith | | | |
| Miscellaneous | Oct 1872 | | | | |
| Miscellaneous | 1873 | | | | |
| Miscellaneous | 25 Sep 1873 | Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | Abt Jan 1874 | Philadelphia, Philadelphia County, Pennsylvania | | | |
| Miscellaneous | 6 Oct 1875 | Bismarck, Dakota Territory | | | |
| Miscellaneous | Abt 1879 | was able to meet all his financial obligations & was out of insolvency | | | |
| Residence | 11 Jun 1880 | with his son-in-law & daughter Laura & was a widow & not employed - Cheltenham, Montgomery County, Pennsylvania | | | |
| Residence | 6 Jun 1900 | with his daughter Laura & son-in-law & was a widow - Cheltenham, Montgomery County, Pennsylvania | | | |
| Death | 16 Feb 1905 | suddenly at the home of his daughter Laura & Son-in-law - Ogontz, Philadelphia County, Pennsylvania | | | |
| Burial | Aft 16 Feb 1905 | Saint Paul's Episcopal Churchyard, Elkins Park, Montgomery County, Pennsylvania | | | |