| Birth | Bet Dec 1846 and Dec 1847 | Illinois | | | |
| Census | 1 Jun 1850 | Town of Ursa, Adams Co., IL, stamped pg. 298B; John H. Washburne, 3 (146-47) born IL. | | | |
| Census | 1 Jun 1860 | Ursa, Adams Co., IL, pg. 412; John H. Washburn, 13 (1846-47) born IL. | | | |
| Marriage | Bef 1870 | Maltby | | | |
| Census | 1 Jun 1880 | Arroyo Grande Pct., San Luis Obispo Co., CA, ED 78 Sh 1A; John H. Washburn, head, 33 (1846-47) born IL father born KY mother born MO, farmer. | | | |
| Census | 1 Jun 1900 | Quincy Ward 6, Riverside Twp., Adams Co., IL, ED 145 Sh 2B; John H. Washburn, father, born Dec 1847, 53, widower, born IL father born KY mother born MO, no occupation listed, living with son Robert and his wife. | | | |
| Census | 15 Apr 1910 | Exeter Twp., Tulare Co., CA, ED 189 Sh 3A; John H. Washburn, father-in-law, 63 (1846-47), widower, born IL father born KY mother born MO, laborer - odd jobs. With Effie and William Breeding family. | | | |
| Census | 1 Jan 1920 | Paddock Pct., Lucerne Twp., Kings Co., CA, ED 130 Sh 15A; John H. Washburn, brother, 72 (1847), widower, born IL father born KY mother born MO, no occupation - disabled. | | | |
| Death | Aft 1 Jan 1920 | | | | |
| Reference No | | 5724 | | | |