IT
Isaac Thompson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Anderson-County, South Carolina
Our Model Tree links this Isaac Thompson across the 1930 and 1940 US Censuses in Anderson-County, South Carolina (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 9-person household.
Age 14
b. ~1926
Male
Son
Born: South Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Anderson-County, South Carolina |
| Surname | Thompson |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Varennes |
| 1935 Residence (County) | Anderson |
| Additional Details | |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 40 |
| Income (1939) | 26 |
| Highest Grade | G 5 |
| 1935 Residence | Same Place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Farm Laborer |
| Township / Ward | Varennes |
| Est. Birth Year | ~1926 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Isaac Thompson | Son | — | 14 | ~1926 |
| D Thompson | Son | — | 15 | ~1925 |
| Mattie Thompson | Spouse | — | 38 | ~1902 |
| Cassie Thompson | Head | — | 31 | ~1909 |
| Grady Thompson | Son | — | 10 | ~1930 |
| Geneiva Thompson | Daughter | — | 3 | ~1937 |
| Daniel Thompson | Son | — | 12 | ~1928 |
| Vera Thompson | Daughter | — | 7 | ~1933 |
| Cassie Thompson | Son | — | ~1940 |
Census Appearances
1930
Anderson, South …
Son, age 3
Anderson, South Carolina · implied b. ~1927 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Isaac Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 3 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Anderson-County, South …
Son, age 14
Anderson-County, South Carolina · implied b. ~1926 — 9 household members
| Surname | Thompson |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Varennes |
| 1935 Residence (County) | Anderson |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 40 |
| Income (1939) | 26 |
| Highest Grade | G 5 |
| 1935 Residence | Same Place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Isaac Thompson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Isaac Thompson
Son · 1940 · age 14 · b. ~1926 · South Carolina
★ You are viewing this record
Sibling
Grady Thompson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
D Thompson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Thompson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cassie Thompson
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vera Thompson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geneiva Thompson
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Anderson-County, South Carolina
Open full size
1940 US Federal Census — Anderson-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03787-00545)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sudie Nora Scott | 13 | Daughter | — | South Carolina |
| 42 | J. E. Scott | 12 | Son | — | South Carolina |
| 43 | Jimmy Lee Scott | 11 | Son | — | South Carolina |
| 44 | Annie Mae Scott | 7 | Daughter | — | South Carolina |
| 45 | Cassie Thompson | 31 | Head | Farm Laborer | South Carolina |
| 46 | Mattie Thompson | 38 | Wife | Farm Laborer | South Carolina |
| 47 | D. A. Thompson | 15 | Son | Farm Laborer | South Carolina |
| 48 | Isaac Thompson THIS PERSON | 14 | Son | Farm Laborer | South Carolina |
| 49 | Daniel Thompson | 12 | Son | — | South Carolina |
| 50 | Grady Thompson | 10 | Son | — | South Carolina |
| 51 | Vera Mae Thompson | 7 | Daughter | — | South Carolina |
| 52 | Geneiva Thompson | 3 | Daughter | — | South Carolina |
| 53 | Cassie Jr. Thompson | 0 | Son | — | South Carolina |
| 54 | David Boston | 32 | Head | Farm Laborer | South Carolina |
| 55 | Rosa Boston | 32 | Wife | Farm Laborer | South Carolina |
| 56 | Ella Mae Boston | 15 | Daughter | Farm Laborer | South Carolina |
| 57 | Mabel Boston | 14 | Daughter | Farm Laborer | South Carolina |
| 58 | Eugene Boston | 12 | Son | — | South Carolina |
| 59 | David Boston | 10 | Son | — | South Carolina |
| 60 | David Jr. Boston | 10 | Son | — | South Carolina |
| 61 | Jesse Boston | 9 | Son | — | South Carolina |
| 62 | Charles Boston | 5 | Son | — | South Carolina |
| 63 | Sam Robinson | 65 | Head | Farmer | South Carolina |
| 64 | Mahalia Robinson | 48 | Wife | — | South Carolina |
| 65 | Junius Robinson | 27 | Son | Farm Laborer | South Carolina |
| 66 | Johnny Robinson | 19 | Son | Farm Laborer | South Carolina |
| 67 | Marie Robinson | 22 | Daughter | Farm Laborer | South Carolina |
| 68 | Joseph Robinson | 31 | Head | Farmer | South Carolina |
| 69 | Lula Robinson | 29 | Wife | Farm Laborer | South Carolina |
| 70 | Allen Ruth Robinson | 9 | Daughter | — | South Carolina |
| 71 | Thomas E. Robinson | 4 | Son | — | South Carolina |
| 72 | Horace Sadler | 32 | Head | Farmer | South Carolina |
| 73 | Annie Sadler | 28 | Wife | Farm Laborer | South Carolina |
| 74 | Margurite Sadler | 10 | Daughter | — | South Carolina |
| 75 | Leo Sadler | 5 | Son | — | South Carolina |
| 76 | Leanna Sadler | 5 | Daughter | — | South Carolina |
| 77 | Aleck Walker | 63 | Head | Farmer | South Carolina |
| 78 | Rosa Walker | 59 | Wife | Farm Laborer | South Carolina |
| 79 | David Walker | 22 | Son | Farm Laborer | South Carolina |
| 80 | Willie Beatty | 36 | Head | Farmer | South Carolina |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)