| Birth | 25 Sep 1873 | Illinois | | | |
| Census | 1 Jun 1880 | Arroyo Grande Pct., San Luis Obispo Co., CA, ED 78 Sh 1A; Robert Washburn, son, 7 (1872-73) born IL both parents born IL. | | | |
| Marriage | 19 Jul 1899 | Adams Co., Illinois - Cora CAMPBELL | |  | |
| Census | 1 Jun 1900 | Quincy Ward 6, Riverside Twp., Adams Co., IL, ED 145 Sh 2B; Robert Washburn, head, born Sep 1873, 26, married 0 yr., born IL father born KY mother born IL [sic]. | | | |
| Census | 15 Apr 1910 | Ursa Twp., Adams Co., IL, ED 61 pg 10B; Robert Washburn, head, 37 (1872-73), widower, born IL both parents born U.S., farmer. Not positive this is the right man, but 2 households from uncle William E. Washburn. | | | |
| Military | 12 Sep 1918 | World War I Draft Registration card; Robert E. Washburn, born 25 Sep | | | |
| Census | 1 Jan 1920 | Ursa Twp., Adams Co., IL, ED 62 pg 10B; Robert Washburn, boarder, 45 (1874), widower, born IL father born U. S. mother born IL. In home of Lizzie and Fred Meyers. | | | |
| Census | 1 Apr 1930 | Ursa Twp., Adams Co., IL, ED 63 pg 5B; Robert Washburn, head, 56 (1873-74), widower, born IL both parents born IL, farmer. Has a laborer and servant living in his household, but no wife. | | | |
| Death | Aft 1 Apr 1930 | | | | |
| Reference No | | 5755 | | | |