| Birth | Aug 1889 | Missouri | | | |
| Census | 1 Jun 1900 | Snow Hill Twp., Lincoln Co., MO, ED 56 Sh 3B; Sidney L. McCoy, son, born Aug 1889, 10, born MO both parents born MO. | | | |
| Census | 15 Apr 1910 | Snow Hill Twp., Lincoln Co., MO, ED 95 Sh 3B; Sidney L. McCoy, son, 20 (1889-90), single, born MO both parents born MO, farm laborer - home farm. | | | |
| Marriage | Abt 1913 | Elizabeth | | | |
| Census | 1 Jan 1920 | Snow Hill Twp., Lincoln Co., MO, ED 108 Sh 4A; Sidney McCoy, head, 30 (1889), married, born MO both parents born MO, farmer. Next door to father and step-mother. | | | |
| Census | 1 Apr 1930 | Snow Hill Twp., Lincoln Co., MO, ED 20 Sh 2B; Sydney L. McCoy, head, 40 (1889-90), 24 at first marriage, born MO both parents born MO, farmer. | | | |
| Reference No | | 8060 | | | |