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Isaac Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Calhoun-County, South Carolina
Our Model Tree links this Isaac Johnson across the 1920, 1930 and 1940 US Censuses in Calhoun-County, South Carolina (XGBoost, ~Confirmed), with identified parents Henry & Hattie — first a head (b.~1913), then head of a 6-person household.
Age 27
b. ~1913
Male
Head
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Calhoun-County, South Carolina |
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 27 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Calhoun |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Farmer |
| Township / Ward | Cawcaw Township |
| Est. Birth Year | ~1913 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Isaac Johnson | Head | — | 27 | ~1913 |
| Inez Johnson | Other | — | 15 | ~1925 |
| Almeta Johnson | Other | — | 17 | ~1923 |
| Dalton Johnson | Son | — | 12 | ~1928 |
| John Johnson | Son | — | 3 | ~1937 |
| Juanita Johnson | Spouse | — | 21 | ~1919 |
Census Appearances
1920
Orangeburg, South …
Son, age 5
Orangeburg, South Carolina · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 5 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | none |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1930
Orangeburg, South …
Son, age 16
Orangeburg, South Carolina · implied b. ~1914 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 16 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Calhoun-County, South …
Head, age 27
Calhoun-County, South Carolina · implied b. ~1913 — 6 household members
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 27 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Calhoun |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | South Carolina |
| 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 Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Henry Johnson (~0.92 confidence) and mother Hattie Johnson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Henry Johnson
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Hattie Johnson
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Isaac Johnson
Head · 1940 · age 27 · b. ~1913 · South Carolina
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Calhoun-County, South Carolina
Open full size
1940 US Federal Census — Calhoun-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03792-00158)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lillie Bell Simpson | 38 | Wife | — | South Carolina |
| 2 | Huey Jr Simpson | 12 | Son | — | South Carolina |
| 3 | Lizzie Simpson | 11 | Daughter | — | South Carolina |
| 4 | Mattie Lou Simpson | 8 | Daughter | — | South Carolina |
| 5 | John Simpson | 6 | Son | — | South Carolina |
| 6 | Joseph Simpson | 3 | Son | — | South Carolina |
| 7 | Manuel Simpson | 1 | Son | — | South Carolina |
| 8 | Priestly Stevenson | 45 | Head | Farmer | South Carolina |
| 9 | Lilly Stevenson | 35 | Wife | — | South Carolina |
| 10 | Shelton Stevenson | 15 | Son | 0 | South Carolina |
| 11 | Allen Stevenson | 13 | Son | — | South Carolina |
| 12 | Georgietta Stevenson | 11 | Daughter | — | South Carolina |
| 13 | Lucille Stevenson | 9 | Daughter | — | South Carolina |
| 14 | Leon Stevenson | 7 | Son | — | South Carolina |
| 15 | John Fril | 68 | Head | Farmer | Scotland |
| 16 | Lizzie Fril | 73 | Wife | — | South Carolina |
| 17 | Norman Mc Cants | 34 | Son | Farmer | South Carolina |
| 18 | Alethea Mc Cants | 25 | Daughter | — | South Carolina |
| 19 | Virginia Mc Cants | 5 | Daughter | — | South Carolina |
| 20 | Solomon Dukes | 36 | Head | Laborer | South Carolina |
| 21 | Beulah Dukes | 26 | Wife | — | South Carolina |
| 22 | Allen Dukes | 15 | Son | — | South Carolina |
| 23 | Vennie Dukes | 13 | Daughter | — | South Carolina |
| 24 | Solomon Jr Dukes | 11 | Son | — | South Carolina |
| 25 | Hannie Dukes | 8 | Son | — | South Carolina |
| 26 | Beulah Mae Dukes | 5 | Daughter | — | South Carolina |
| 27 | Clarissa Dukes | 3 | Daughter | — | South Carolina |
| 28 | James Dukes | 2 | Son | — | South Carolina |
| 29 | Sampson Dukes | 34 | Head | Farmer | South Carolina |
| 30 | Adriana Washington | 35 | Sister | — | South Carolina |
| 31 | Ruth Washington | 17 | Niece | — | South Carolina |
| 32 | Lizzie Washington | 15 | Niece | — | South Carolina |
| 33 | Isaac Johnson THIS PERSON | 27 | Head | Farmer | South Carolina |
| 34 | Juanita Johnson | 21 | Wife | — | South Carolina |
| 35 | John Jr Johnson | 3 | Son | — | South Carolina |
| 36 | Almeta Johnson | 17 | Sister | — | South Carolina |
| 37 | Inez Johnson | 15 | Sister | — | South Carolina |
| 38 | Dalton Johnson | 12 | Son | — | South Carolina |
| 39 | Dan Baskin | 48 | Head | Carpenter | South Carolina |
| 40 | Ada Baskin | 49 | Wife | — | South Carolina |
Pedigree Summary
Isaac
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)