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Isaac Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Greenville-County, South Carolina
Our Model Tree links this Isaac Johnson across the 1910, 1920, 1930 and 1940 US Censuses in Greenville-County, South Carolina (XGBoost, ~Confirmed), with identified parents Karl & Rosie — first a head (b.~1909), then head of a 4-person household.
Age 31
b. ~1909
Male
Head
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Greenville-County, South Carolina |
| Surname | Johnson |
| Given Name | Isaac D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Anderson |
| Additional Details | |
| Occupation | Laborer |
| Industry | Road Project |
| Class of Worker | GW |
| Hours Worked | 65 |
| Income (1939) | 576 |
| Highest Grade | H-4 |
| 1935 Residence | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Laborer |
| Township / Ward | Greenville |
| Est. Birth Year | ~1909 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Joe Johnson | Daughter | — | 5 | ~1935 |
| Doris Johnson | Daughter | — | 3 | ~1937 |
| Isaac Johnson | Head | — | 31 | ~1909 |
| Nellie Johnson | Spouse | — | 29 | ~1911 |
Census Appearances
1910
Pickens, South …
Son, age 2
Pickens, South Carolina · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 2 |
| 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 |
1920
Greenville, South …
Son, age 11
Greenville, South Carolina · implied b. ~1909 — 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 | 11 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Farm Laborer |
| Industry | Home farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1930
Greenville, South …
Head, age 22
Greenville, South Carolina · implied b. ~1908 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 22 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 20 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Truck Driver |
| Industry | Electric Rail R |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 7 |
| Veteran | No |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Greenville-County, South …
Head, age 31
Greenville-County, South Carolina · implied b. ~1909 — 4 household members
| Surname | Johnson |
| Given Name | Isaac D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Anderson |
| Occupation | Laborer |
| Industry | Road Project |
| Class of Worker | GW |
| Hours Worked | 65 |
| Income (1939) | 576 |
| Highest Grade | H-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 4 US Census years (1910, 1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Karl Johnson (~0.92 confidence) and mother Rosie Johnson (~0.92 confidence) and father Furman Johnson (~0.92 confidence) and mother Cornelia Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Karl Johnson
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Rosie Johnson
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
Furman Johnson
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Cornelia Johnson
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Isaac Johnson
Head · 1940 · age 31 · b. ~1909 · 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 — Greenville-County, South Carolina
Open full size
1940 US Federal Census — Greenville-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03812-00913)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Brown | 32 | Head | Shoe Shiner | South Carolina |
| 42 | Cora (X) Brown | 29 | Wife | Cook | South Carolina |
| 43 | Tom Mackey | 64 | Head | — | South Carolina |
| 44 | Irene (X) Edwards | 46 | Lodger | Cook | South Carolina |
| 45 | George Reynolds | 41 | Head | Sick Cleaner | South Carolina |
| 46 | Jessie (X) Reynolds | 18 | Wife | — | South Carolina |
| 47 | Carrie Ann Johnson | 15 | Sister-in-law | — | South Carolina |
| 48 | Isaac D Johnson THIS PERSON | 31 | Head | Laborer | South Carolina |
| 49 | Nellie (X) Johnson | 29 | Wife | Cook | South Carolina |
| 50 | Joe Nell Johnson | 5 | Daughter | — | South Carolina |
| 51 | Doris Jean Johnson | 3 | Daughter | — | South Carolina |
| 52 | James W. (X) Leopard | 53 | Head | Watchman | South Carolina |
| 53 | Bessie Leopard | 44 | Wife | — | South Carolina |
| 54 | Lois Leopard | 15 | Daughter | — | South Carolina |
| 55 | Louise Leopard | 12 | Daughter | — | South Carolina |
| 56 | Sybil Leopard | 9 | Daughter | — | South Carolina |
| 57 | Joel B. Harrison | 34 | Head | Mechanic | South Carolina |
| 58 | Sara (X) Harrison | 32 | Wife | — | South Carolina |
| 59 | Joel B. Jr. Harrison | 12 | Son | — | South Carolina |
| 60 | Barbara Ann Harrison | 6 | Daughter | — | South Carolina |
| 61 | Sampey Mitchell | 40 | Lodger | Watchmaker | South Carolina |
| 62 | Grant W. Bowden | 45 | Head | Railroad Clerk | Georgia |
| 63 | Virgie Bowden | 35 | Wife | — | Georgia |
| 64 | Nancy Bowden | 3 | Daughter | — | South Carolina |
| 65 | Andrew B. (X) White | 46 | Head | Salesman | Louisiana |
| 66 | Clara F. White | 37 | Wife | — | Louisiana |
| 67 | Virginia Lee White | 8 | Daughter | — | South Carolina |
| 68 | Andrew B. Jr. White | 3 | Son | — | South Carolina |
| 69 | Oliver N. Berry | 32 | Head | Pressman | South Carolina |
| 70 | Edna (X) Berry | 29 | Wife | — | South Carolina |
| 71 | Olive Berry | 13 | Daughter | — | South Carolina |
| 72 | Oliver Jr. Berry | 9 | Son | — | South Carolina |
| 73 | Evelyn Berry | 6 | Daughter | — | South Carolina |
| 74 | Miriam Berry | 0 | Daughter | — | South Carolina |
| 75 | Gilbert Williams | 33 | Head | Auto Dealer | Georgia |
| 76 | Corrine (X) Williams | 30 | Wife | — | South Carolina |
| 77 | Russell Williams | 8 | Son | — | South Carolina |
| 78 | Sara Williams | 4 | Daughter | — | South Carolina |
| 79 | Sam S. Mckitrick | 42 | Head | Cotton Buyer | South Carolina |
| 80 | Allroland (X) Mckitrick | 32 | Wife | — | South Carolina |
Pedigree Summary
Isaac
Gen 1 · 4 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)