| Birth | 14 Mar 1785 | Southampton, Hampshire County, Massachusetts | | | |
| Baptism | Mar 1785 | at the Congregational Church, Southampton, Hampshire County, Massachusetts | | | |
| Residence | Jun 1800 | (probably) with his father and step-mother - Southampton, Hampshire County, Massachusetts | | | |
| Graduated | 1808 | Yale University - New Haven, New Haven County, Connecticut | | | |
| Miscellaneous | 16 Nov 1811 | ran an ad in the Cooperstown Federalist announcing his doctor's office - Cooperstown, Otsego County, New York | | | |
| Residence | 1812 | & was a member of the Otsego County Medical Society - Cooperstown, Otsego County, New York | | | |
| Miscellaneous | 1 Jan 1812 | advertised receiving a vaccination and that he was available to perform some dental services - Cooperstown, Otsego County, New York | | | |
| Marriage | 3 Jan 1815 | Presbyterian Church, Cooperstown, Otsego County, New York - Mary FULLER | | | |
| Miscellaneous | 1 Jan 1816 | had a letter remaining at the post office - New York, New York County, New York | | | |
| Miscellaneous | 10 Apr 1818 | named in his father's will to receive 1/2 of the land in OH and $50 - Southampton, Hampshire County Massachusetts | | | |
| Residence | 1818 | and practiced medicine - Utica, Oneida County, New York | | | |
| Religion | Dec 1819 | a member of the Presbyterian Church - Cooperstown, Otsego County, New York | | | |
| Residence | 8 Jan 1820 | Cooperstown, Otsego County, New York | | | |
| Miscellaneous | 1 May 1820 | was commissioned a surgeon for the Second Regiment Infantry - Otsego County, New York | | | |
| Miscellaneous | 1 May 1820 | was commissioned a surgeon for the Second Regiment Infantry - Otsego County, New York | | | |
| Occupation | Abt 1820 | physician - Cooperstown, Otsego County, New York | | | |
| Residence | 1820 | with his family - Otsego, Otsego County, New York | | | |
| Miscellaneous | 1 Aug 1820 | [possibly] made a purchase at Nathan Williams' store - Manlius, Onondaga County, New York | | | |
| Miscellaneous | 24 Nov 1821 | Cuyahoga County, Ohio | | | |
| Religion | Mar 1822 | received a letter of recommendation leaving the Presbyterian Church - Cooperstown, Otsego County, New York | | | |
| Religion | 7 Apr 1822 | became a member by letter of the First Presbyterian Church - Utica, Oneida County, New York | | | |
| Miscellaneous | 12 Jul 1822 | was a plaintiff against Thomas Shankland who was given 20 days to answer the ruling - Onondaga County, New York | | | |
| Miscellaneous | 1 Aug 1822 | Onondaga County, New York | | | |
| Occupation | 20 Jun 1825 | doctor & became partner with Dr Edward Aikin in the practice of Pomeroy & Aikin on Main Street - Utica, Oneida County, New York | | | |
| Miscellaneous | 1826 | taught Lucian B Wells with Dr. Batchelder in the study of medicine - Utica, Herkimer County, New York | | | |
| Marriage | 8 Nov 1826 | New Brunswick, Middlesex County, New Jersey - Cornelia VOORHEES | | | |
| Miscellaneous | 27 May 1827 | sold with his Uncle Asahel & siblings to Nathan Perry for $200, lot 400 - Cleveland, Cuyahoga, Ohio, United States | | | |
| Residence | 30 May 1827 | New York | | | |
| Occupation | 17 Mar 1829 | in partnership with Dr. John P. Batchelder, a surgeon at 14 Exchange Bldg, Genesee Street - Utica, Oneida County, New York | | | |
| Miscellaneous | 12 May 1830 | and Dr. Batchelder discontinued their partnership with Pomeroy's office moving to Bleecker St. - Utica, Oneida County, New York | | | |
| Residence | Jun 1830 | with his family - Utica, Oneida County, New York | | | |
| Occupation | Aft 1832 | owned and managed an oil cloth manufacturing company - Utica, Oneida County, New York | | | |
| Miscellaneous | 1836 | vice president of the county medical society - Utica, Oneida County, New York | | | |
| Miscellaneous | 28 Apr 1837 | was one of the first trustees of the Utica Female Academy - Utica, Oneida County, New York | | | |
| Miscellaneous | 1837 | was president of the county medical society - Utica, Oneida County, New York | | | |
| Religion | 22 Oct 1838 | elected as an Elder of the First Presbyterian Church - Utica, Oneida County, New York | | | |
| Residence | Jun 1840 | with his family - Utica, Oneida County, New York | | | |
| Religion | 3 Jul 1844 | released as an elder of the First Presbyterian Church - Utica, Oneida County, New York | | | |
| Religion | 23 Jul 1844 | was chosen one of the elders at the formation of the Westminster Presbyterian Church - Utica, Oneida County, New York | | | |
| Religion | 28 Aug 1844 | was dismissed as an elder from the First Presbyterian Church - Utica, Oneida County, New York | | | |
| Miscellaneous | 15 May 1845 | stayed at the Franklin Hotel while visiting - New York, New York County, New York | | | |
| Occupation | Abt 1850 | physician and oil-cloth manufacturer - Utica, Oneida County, New York | | | |
| Occupation | 29 Jul 1850 | physician - Utica, Oneida County, New York | | | |
| Occupation | | partnership with his son George G. Pomeroy in the oil cloth business called Pomeroy & Son - Utica, Oneida County, New York | | | |
| Miscellaneous | 15 Dec 1853 | advertized a cure for prolapsed uterus and other feminine complaints | | | |
| Residence | 1855 | and was a physician - Utica, Oneida County, New York | | | |
| Will | 23 Apr 1857 | Oneida County, New York | | | |
| Occupation | 1859 | was a physician at 57 Fayette - Utica, Oneida County, New York | | | |
| Death | 25 Jun 1860 | after a short illness while visiting his sons - Saint Anthony, Hennepin County, Minnesota | | | |
| Death | 25 Jun 1860 | after a short illness while visiting his sons - Saint Anthony, Hennepin County, Minnesota | | | |
| Occupation | 10 Jul 1860 | doctor of medicine - Utica, Oneida County, New York | | | |
| Probate | 28 Aug 1860 | Utica, Oneida County, New York | | | |