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Isaac Johnson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Anne Arundel, Maryland
Our Model Tree links this Isaac Johnson across the 1920, 1930 and 1940 US Censuses in Anne Arundel, Maryland (XGBoost, ~Confirmed), with identified parents Columbus & Stella — first a head (b.~1909), then head of a 4-person household.
Age 21
b. ~1909
Male
Head
Born: Maryland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Anne Arundel, Maryland |
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Laborer |
| Industry | Naval Academy |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 17 |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Laborer |
| Township / Ward | Annapolis City |
| 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 1930 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Bertie Johnson | Daughter | — | 2 | ~1928 |
| Isaac Johnson | Head | — | 21 | ~1909 |
| Bertie Johnson | Other | — | 25 | ~1905 |
| Irene Johnson | Spouse | — | 25 | ~1905 |
Census Appearances
1920
Anne Arundel, …
Son, age 10
Anne Arundel, Maryland · implied b. ~1910 — 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 | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Anne Arundel, …
Head, age 21
Anne Arundel, Maryland · implied b. ~1909 — 4 household members
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Naval Academy |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 17 |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Anne-Arundel-County, Maryland
Son, age 26
Anne-Arundel-County, Maryland · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isiah |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | 3rd Election Dist. |
| 1935 Residence (County) | Anne Arundel |
| Occupation | Laborer |
| Industry | Navy Yard |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 302 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Columbus Johnson (~0.92 confidence) and mother Stella Johnson (~0.92 confidence) and father William Johnson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Columbus Johnson
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Stella Johnson
b. ~1874
Source mother
● Household
· direct · ~0.92
Father
William Johnson
b. ~1886
Source father
● Household
· direct · ~0.92
This person
Anchor record
Isaac Johnson
Head · 1930 · age 21 · b. ~1909 · Maryland
★ 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 — Anne Arundel, Maryland
Open full size
1930 US Federal Census — Anne Arundel, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus845unit:0512)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary E. Taylor | 57 | Head | Laundress | Maryland |
| 2 | Benjamin Boston | 45 | Sister | — | Maryland |
| 3 | Madison Black | 27 | Daughter | — | Maryland |
| 4 | Rosa Mcqueens | 34 | Boarder | — | Maryland |
| 5 | Maudry Brice | 3 | Boarder | Laundress | Maryland |
| 6 | Susie Carroll | 39 | Head | — | Maryland |
| 7 | Bertha Johnson | 22 | Sister | Maid | Maryland |
| 8 | Alfred Weems | 4 | Boarder | — | Maryland |
| 9 | Sarah Taylor | 77 | Head | Laborer | Maryland |
| 10 | Irma Sharps | 22 | Daughter | — | Maryland |
| 11 | Elizabeth Spencer | 25 | Gr-Daughter | Laundress | Maryland |
| 12 | Frank Spencer | 27 | Son-in-law | Maid | Maryland |
| 13 | Daniel Bais | 7 | Gr-Son | — | Maryland |
| 14 | Charles Hart | 55 | Boarder | Laborer | Maryland |
| 15 | Joseph Hart | 18 | Boarder | Laborer | Maryland |
| 16 | Ella Franklin | 51 | Head | — | Maryland |
| 17 | Estelle Franklin | 23 | Daughter | Laundress | Maryland |
| 18 | Isaac Franklin | 22 | Son | — | Maryland |
| 19 | Isaac Johnson THIS PERSON | 21 | Head | Laborer | Maryland |
| 20 | Irene Johnson | 25 | Wife | — | Maryland |
| 21 | Bertie S. Johnson | 2 | Daughter | — | Maryland |
| 22 | Bertie L. Johnson | 25 | Sister | — | Maryland |
| 23 | John W. Parker | 51 | Head | Laborer | Maryland |
| 24 | Annie C. Parker | 47 | Wife | — | Maryland |
| 25 | George Stevens | 44 | Head | Oysterman | Maryland |
| 26 | Mattie Stevens | 26 | Wife | Maid | Maryland |
| 27 | George Stevens | 21 | Son | Mess Attendant | Maryland |
| 28 | Clarence Stevens | 17 | Son | Laborer | Maryland |
| 29 | George E. Stevens | 11 | Son | — | Maryland |
| 30 | Evelyn A. Stevens | 2 | Daughter | — | Maryland |
| 31 | Columbus Johnson | 55 | Head | Laborer | Maryland |
| 32 | Eleanora Johnson | 45 | Wife | — | Maryland |
| 33 | Sarah Johnson | 24 | Daughter | Laundress | Maryland |
| 34 | Robert H. Johnson | 13 | Son | Teamster | Maryland |
| 35 | William Brown | 30 | Son | Laborer | Maryland |
| 36 | Charles E. Wallace | 6 | Gr-Son | — | Maryland |
| 37 | James Wallace | 5 | Gr-Son | — | Maryland |
| 38 | Walter Booth | 35 | Head | Laborer | Maryland |
| 39 | Rosa Booth | 26 | Wife | Dressmaking | Maryland |
| 40 | Elen Johnson | 35 | Mother | — | Maryland |
| 41 | Charles H. Herring | 36 | Head | Cook | Maryland |
| 42 | Hattie Herring | 32 | Wife | — | Maryland |
| 43 | Frank Evans | 37 | Head | Laborer | Maryland |
| 44 | Annie E. Evans | 29 | Wife | — | Maryland |
| 45 | Mary Jones | 76 | Head | Maid | Maryland |
| 46 | Mary Johnson | 13 | Niece | — | Maryland |
| 47 | Edward Johnson | 10 | Nephew | — | Maryland |
| 48 | Wesley Allsup | 45 | Boarder | Laborer | Maryland |
| 49 | Richard Brown | 40 | Head | Laborer | Maryland |
| 50 | Alice Brown | 38 | Wife | Servant | Maryland |
Pedigree Summary
Isaac
Gen 1 · 3 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)