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Isaac Johnson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Charleston, South Carolina
Our Model Tree links this Isaac Johnson across the 1900, 1910, 1920 and 1930 US Censuses in Charleston, South Carolina (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 7-person household.
Age 45
b. ~1885
Male
Head
Born: South Carolina
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Charleston, South Carolina |
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 45 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 20 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Additional Details | |
| Occupation | Drayman |
| Industry | Own Business |
| Class of Worker | W |
| Can Read/Write | No |
| Home Owned/Rented | R |
| Home Value / Rent | 12.00 |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Drayman |
| Township / Ward | Charleston City |
| Est. Birth Year | ~1885 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Isaac Johnson | Head | — | 45 | ~1885 |
| Henry Johnson | Other | — | 8 | ~1922 |
| Daisy Johnson | Other | — | 23 | ~1907 |
| Phoebe Johnson | Other | — | 4 | ~1926 |
| Virginia Johnson | Other | — | 3 | ~1927 |
| Carroll Johnson | Son | — | 24 | ~1906 |
| Lottie Johnson | Spouse | — | 50 | ~1880 |
Census Appearances
1900
Charleston, South …
Head, age 17
Charleston, South Carolina · implied b. ~1883
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 16 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Birth Month | July |
| Birth Year | 1883 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1910
Charleston, South …
Head, age 26
Charleston, South Carolina · implied b. ~1884 — 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 | 26 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Years Married | 1 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Washer woman |
| Industry | At Home |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1920
Charleston, South …
Head, age 35
Charleston, South Carolina · implied b. ~1885 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 35 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1930
Charleston, South …
Head, age 45
Charleston, South Carolina · implied b. ~1885 — 7 household members
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 45 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 20 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Drayman |
| Industry | Own Business |
| Class of Worker | W |
| Can Read/Write | No |
| Home Owned/Rented | R |
| Home Value / Rent | 12.00 |
| 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 (1900, 1910, 1920 and 1930) in Charleston, South Carolina, using XGBoost record linkage.
Show:
This person
Anchor record
Isaac Johnson
Head · 1930 · age 45 · b. ~1885 · South Carolina
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Charleston, South Carolina
Open full size
1930 US Federal Census — Charleston, South Carolina
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2189unit:0883)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Walter C Bauman | 27 | Head | Shipping Clerk | South Carolina |
| 52 | Estelle Bauman | 22 | Wife | — | South Carolina |
| 53 | Walter Jr Bauman | 5 | Son | — | South Carolina |
| 54 | James Mcguire | 32 | Head | Carpenter | South Carolina |
| 55 | Mary Mcguire | 29 | Wife | — | South Carolina |
| 56 | Isaac Johnson THIS PERSON | 45 | Head | Drayman | South Carolina |
| 57 | Lottie Johnson | 50 | Wife | — | South Carolina |
| 58 | Carroll Johnson | 24 | Son | Laborer | South Carolina |
| 59 | Daisy Johnson | 23 | Daughter-in-law | — | South Carolina |
| 60 | Henry Johnson | 8 | Grandson | — | South Carolina |
| 61 | Phoebe Johnson | 4 | Granddaughter | — | South Carolina |
| 62 | Virginia Johnson | 3 | Granddaughter | — | South Carolina |
| 63 | Safford Davis | 40 | Head | Laborer | South Carolina |
| 64 | Cornelia Davis | 38 | Wife | Servant | South Carolina |
| 65 | Lois Davis | 17 | Daughter | Laborer | South Carolina |
| 66 | Arthur Johnson | 20 | Step-son | Laborer | South Carolina |
| 67 | Charlie Davis | 19 | Son | Laborer | South Carolina |
| 68 | Eliza Artisid | 31 | Head | Servant | South Carolina |
| 69 | Bernice Pickhume | 20 | Head | Servant | South Carolina |
| 70 | Washington Strong | 46 | Head | Laborer | South Carolina |
| 71 | Hattie Strong | 46 | Wife | — | South Carolina |
| 72 | Ben Williams | 25 | Step-son | Laborer | South Carolina |
| 73 | Solomon Small | 44 | Head | Laborer | South Carolina |
| 74 | Sarah Small | 35 | Wife | — | South Carolina |
| 75 | Sue E Small | 10 | Daughter | — | South Carolina |
| 76 | Joseph Small | 3 | Son | — | South Carolina |
| 77 | Rachelle Drayton | 38 | Head | Laundress | South Carolina |
| 78 | Sydney R Drayton | 24 | Son | Driver | South Carolina |
| 79 | Willie Haynes | 41 | Head | Longshoreman | South Carolina |
| 80 | Mary Haynes | 32 | Wife | Servant | South Carolina |
| 81 | Joe Small | 25 | Head | Laborer | South Carolina |
| 82 | Maggie Small | 23 | Wife | — | South Carolina |
| 83 | Jim Mungault | 35 | Head | Laborer | South Carolina |
| 84 | Eva Mungault | 33 | Wife | — | South Carolina |
| 85 | John Mungault | 2 | Son | — | South Carolina |
| 86 | Josephine Martin | 61 | Mother-in-law | — | South Carolina |
| 87 | Baby Mungault | 0 | Son | — | South Carolina |
| 88 | Paul Smith | 35 | Head | Laborer | South Carolina |
| 89 | Joe Williams | 23 | Head | Servant | South Carolina |
| 90 | Annie Jones | 21 | Head | Laborer | South Carolina |
| 91 | George Curtis | 40 | Head | Longshoreman | South Carolina |
| 92 | Eudora Curtis | 25 | Wife | — | South Carolina |
| 93 | Emma Davis | 25 | Head | Servant | South Carolina |
| 94 | James E Snipes | 35 | Boarder | Laborer | South Carolina |
| 95 | William Brown | 30 | Head | Laborer | South Carolina |
| 96 | Bessie Brown | 27 | Wife | — | South Carolina |
| 97 | William Brown | 9 | Son | — | South Carolina |
| 98 | Elizabeth Logan | 60 | Head | — | South Carolina |
| 99 | May Logan | 30 | Daughter | Laborer | South Carolina |
| 100 | John Logan | 4 | Son | — | South Carolina |
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)