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Isaac Johnson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Allendale, South Carolina
Our Model Tree links this Isaac Johnson across the 1920, 1930 and 1940 US Censuses in Allendale, South Carolina (XGBoost, ~Confirmed), with identified parents Charlie & Siena — first a son (b.~1912), then head of a 6-person household.
Age 18
b. ~1912
Male
Son
Born: South Carolina
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Allendale, South Carolina |
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 18 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Additional Details | |
| Occupation | Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | No |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Laborer |
| Township / Ward | Millett Township |
| Est. Birth Year | ~1912 |
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 1930 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Eliza Johnson | Daughter | — | 16 | ~1914 |
| Mary Johnson | Daughter | — | 14 | ~1916 |
| Julia Johnson | Daughter | — | 2 | ~1928 |
| Charles Johnson | Head | — | 40 | ~1890 |
| Isaac Johnson | Son | — | 18 | ~1912 |
| Clara Johnson | Spouse | — | 37 | ~1893 |
Census Appearances
1920
Allendale, South …
Son, age 10
Allendale, South Carolina · implied b. ~1910 — 20 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | none |
| Speaks English | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1930
Allendale, South …
Son, age 18
Allendale, South Carolina · implied b. ~1912 — 6 household members
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 18 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | No |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Allendale-County, South …
Head, age 27
Allendale-County, South Carolina · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isaiah |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 27 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Millet |
| 1935 Residence (County) | Allendale |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 180 |
| Highest Grade | No 4 |
| 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 Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charlie Johnson (~0.92 confidence) and mother Siena Carter (~0.92 confidence) and mother Clara Johnson (~0.92 confidence) and father Charles Johnson (~0.92 confidence) and mother Hornetta Williams (~0.92 confidence) and mother Clara Johnson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charlie Johnson
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Siena Carter
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Clara Johnson
b. ~1887
Source mother
● Household
· direct · ~0.92
Father
Charles Johnson
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Hornetta Williams
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Clara Johnson
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Isaac Johnson
Son · 1930 · age 18 · b. ~1912 · South Carolina
★ You are viewing this record
Sibling
Mary Johnson
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Johnson
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eliza Johnson
Sibling · 1930 · age 16
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
1930 US Federal Census — Allendale, South Carolina
Open full size
1930 US Federal Census — Allendale, South Carolina
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2185unit:0644)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Hay | 40 | Head | Laborer | South Carolina |
| 2 | George Hay | 16 | Son | Laborer | South Carolina |
| 3 | Margie Hay | 14 | Daughter | — | South Carolina |
| 4 | Mary Hay | 10 | Daughter | — | South Carolina |
| 5 | Tom Hay | 8 | Son | — | South Carolina |
| 6 | Leon Hay | 6 | Son | — | South Carolina |
| 7 | Charles Johnson | 40 | Head | Laborer | South Carolina |
| 8 | Clara Johnson | 37 | Wife | — | South Carolina |
| 9 | Isaac Johnson THIS PERSON | 18 | Son | Laborer | South Carolina |
| 10 | Eliza Johnson | 16 | Daughter | — | South Carolina |
| 11 | Mary Johnson | 14 | Daughter | — | South Carolina |
| 12 | Julia Johnson | 2 | Daughter | — | South Carolina |
| 13 | Harry E. Johnson | 50 | Head | Farmer | South Carolina |
| 14 | Lucile Johnson | 40 | Wife | — | South Carolina |
| 15 | Harry Edward Johnson | 19 | Son | — | South Carolina |
| 16 | Emily Johnson | 16 | Daughter | — | South Carolina |
| 17 | Mary M. Johnson | 12 | Daughter | — | South Carolina |
| 18 | June Dunbar | 30 | Cousin | — | South Carolina |
| 19 | Addison Barnes | 40 | Head | Laborer | South Carolina |
| 20 | Martha Barnes | 40 | Wife | — | South Carolina |
| 21 | Rockier Barnes | 16 | Daughter | — | South Carolina |
| 22 | Lizzie Barnes | 12 | Daughter | — | South Carolina |
| 23 | Sallie Barnes | 9 | Daughter | — | South Carolina |
| 24 | James A. Furse | 70 | Head | Farmer | South Carolina |
| 25 | Julia N. Furse | 50 | Wife | — | Alabama |
| 26 | James A. Furse | 19 | Son | — | Georgia |
| 27 | George Roberts | 22 | Head | Laborer | South Carolina |
| 28 | Minnie Roberts | 17 | Wife | — | South Carolina |
| 29 | Marion Roberts | 20 | Brother | Laborer | South Carolina |
| 30 | Willie Parson | 50 | Head | Farmer | South Carolina |
| 31 | Ruth Parson | 33 | Wife | — | South Carolina |
| 32 | Willie Jr. Parson | 11 | Son | — | South Carolina |
| 33 | Harry Parson | 9 | Son | — | South Carolina |
| 34 | James Parson | 7 | Son | — | South Carolina |
| 35 | Bertha Parson | 5 | Daughter | — | South Carolina |
| 36 | Nuson Parson | 3 | Son | — | South Carolina |
| 37 | James Edwards | 50 | Head | Farmer | South Carolina |
| 38 | Viginer Edwards | 36 | Wife | — | South Carolina |
| 39 | Joe Edwards | 10 | Son | — | South Carolina |
| 40 | David Edwards | 8 | Son | — | South Carolina |
| 41 | Ashery Edwards | 6 | Son | — | South Carolina |
| 42 | Thomas Edwards | 4 | Son | — | South Carolina |
| 43 | Eunice Edwards | 3 | Daughter | — | South Carolina |
| 44 | Ola Edwards | 1 | Daughter | — | South Carolina |
| 45 | Walter Edwards | 30 | Head | Farmer | South Carolina |
| 46 | Carrie Edwards | 30 | Wife | — | South Carolina |
| 47 | Maggie Edwards | 9 | Daughter | — | South Carolina |
| 48 | Willie Edwards | 7 | Son | — | South Carolina |
| 49 | Arthur Edwards | 5 | Son | — | South Carolina |
| 50 | Estell Edwards | 3 | Daughter | — | South Carolina |
Pedigree Summary
Isaac + 3 siblings
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)