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Isaac Johnson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Sumter, South Carolina
Our Model Tree links this Isaac Johnson across the 1910, 1920 and 1930 US Censuses in Sumter, South Carolina (XGBoost, ~Confirmed), with identified parents Edward & Fannie — first a head (b.~1898), then head of a 4-person household.
Age 32
b. ~1898
Male
Head
Born: South Carolina
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Sumter, South Carolina |
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 32 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 19 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Additional Details | |
| Occupation | Brick layer |
| Industry | House |
| Class of Worker | W |
| Can Read/Write | No |
| Home Owned/Rented | O |
| Home Value / Rent | 100 |
| Veteran | No |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Brick Layer |
| Township / Ward | Mayesville Town |
| Est. Birth Year | ~1898 |
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 1930 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Isaac Johnson | Head | — | 32 | ~1898 |
| Isaac Johnson | Son | — | 10 | ~1920 |
| William Johnson | Son | — | 7 | ~1923 |
| Nellie Johnson | Spouse | — | 29 | ~1901 |
Census Appearances
1910
Sumter, South …
Son, age 10
Sumter, South Carolina · implied b. ~1900 — 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 | 10 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1920
Sumter, South …
Other, age 21
Sumter, South Carolina · implied b. ~1899 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | boarder |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | laborer |
| Industry | working out |
| 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
Sumter, South …
Head, age 32
Sumter, South Carolina · implied b. ~1898 — 4 household members
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 32 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 19 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Brick layer |
| Industry | House |
| Class of Worker | W |
| Can Read/Write | No |
| Home Owned/Rented | O |
| Home Value / Rent | 100 |
| Veteran | No |
| 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 (1910, 1920 and 1930) in Sumter, South Carolina, using XGBoost record linkage. Identified parents: father Edward Johnson (~0.92 confidence) and mother Fannie Johnson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Johnson
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Fannie Johnson
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Isaac Johnson
Head · 1930 · age 32 · b. ~1898 · South Carolina
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Sumter, South Carolina
Open full size
1930 US Federal Census — Sumter, South Carolina
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2213unit:1133)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Grant | 5 | Son | — | South Carolina |
| 2 | Rosie L Grant | 3 | Daughter | — | South Carolina |
| 3 | Julia Grant | 1 | Daughter | — | South Carolina |
| 4 | Mary Stuart | 45 | Head | Cook | South Carolina |
| 5 | Thomas Mcdaniel | 46 | Head | Laborer | South Carolina |
| 6 | Janey Mcdaniel | 42 | Wife | — | South Carolina |
| 7 | Gertrude Mcdaniel | 14 | Daughter | — | South Carolina |
| 8 | Hattie Mcdaniel | 12 | Daughter | — | South Carolina |
| 9 | Virginia Mcdaniel | 10 | Daughter | — | South Carolina |
| 10 | Lucille Mcdaniel | 7 | Daughter | — | South Carolina |
| 11 | Sarah Rambert | 60 | Head | — | South Carolina |
| 12 | Clark Lowery | 75 | Head | — | South Carolina |
| 13 | Isaac Lewis | 27 | Head | Farm Laborer | South Carolina |
| 14 | Marie Lewis | 22 | Wife | — | South Carolina |
| 15 | Isaac Jr Lewis | 5 | Son | — | South Carolina |
| 16 | John Lewis | 3 | Son | — | South Carolina |
| 17 | Philip Lewis | 0 | Son | — | South Carolina |
| 18 | Mary Commander | 40 | Head | Laundress | South Carolina |
| 19 | Georgia Smith | 19 | Niece | — | South Carolina |
| 20 | Ella Smith | 18 | Niece | — | South Carolina |
| 21 | Halsey Williams | 11 | Niece | — | South Carolina |
| 22 | Oliver Green | 25 | Head | Laborer | South Carolina |
| 23 | Lucile Green | 21 | Wife | Cook | South Carolina |
| 24 | James Lindsey | 26 | Boarder | Cook | Florida |
| 25 | Rosie Lindsey | 20 | Boarder | — | Virginia |
| 26 | Charley Mace | 37 | Head | Driver | South Carolina |
| 27 | Julia Mace | 27 | Wife | — | South Carolina |
| 28 | Isaac Johnson THIS PERSON | 32 | Head | Brick Layer | South Carolina |
| 29 | Nellie Johnson | 29 | Wife | — | South Carolina |
| 30 | Isaac Jr Johnson | 10 | Son | — | South Carolina |
| 31 | William Johnson | 7 | Son | — | South Carolina |
| 32 | George Walker | 22 | Head | Laborer | South Carolina |
| 33 | Lottie Walker | 18 | Wife | — | South Carolina |
| 34 | George Jr Walker | 1 | Son | — | South Carolina |
| 35 | Harvey Johnson | 45 | Head | Farm Laborer | South Carolina |
| 36 | Henry Johnson | 20 | Son | Farm Laborer | South Carolina |
| 37 | Annie Johnson | 19 | Daughter-in-law | Farm Laborer | South Carolina |
| 38 | Moses Johnson | 19 | Son | Farm Laborer | South Carolina |
| 39 | Lunnell Johnson | 18 | Daughter-in-law | Farm Laborer | South Carolina |
| 40 | Jamie Johnson | 17 | Daughter | Teacher | South Carolina |
| 41 | Clara Johnson | 15 | Daughter | — | South Carolina |
| 42 | Annie Johnson | 11 | Granddaughter | — | South Carolina |
| 43 | Mack L Johnson | 5 | Grandson | — | South Carolina |
| 44 | Clara L Johnson | 1 | Granddaughter | — | South Carolina |
| 45 | Walter Gantman | 34 | Head | Laborer | South Carolina |
| 46 | Mary J Gantman | 30 | Wife | — | South Carolina |
| 47 | Gladis Gantman | 8 | Daughter | — | South Carolina |
| 48 | James Wilson | 28 | Head | Farmer | South Carolina |
| 49 | Laura Wilson | 28 | Wife | — | South Carolina |
| 50 | Henry Wilson | 10 | Son | — | 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 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)