HJ
Harold Jackson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Harold Jackson across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1911), then head of a 5-person household.
Age 29
b. ~1911
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Jackson |
| Given Name | Harold L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Cleaning |
| Industry | Home Service |
| Class of Worker | OA |
| Income (1939) | 520 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Cleaning |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1911 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Teresa Jackson | Daughter | — | 2 | ~1938 |
| Wenonah Jackson | Daughter | — | 12 | ~1928 |
| Marie Jackson | Spouse | — | 32 | ~1908 |
| Harold Jackson | Head | — | 29 | ~1911 |
| Harold Jackson | Son | — | 7 | ~1933 |
Census Appearances
1920
Polk, Iowa
Other, age 8
Polk, Iowa · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jackson |
| Given Name | Harold |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Other, age 19
Polk, Iowa · implied b. ~1911 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jackson |
| Given Name | Harold |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | Elevator boy |
| Industry | Office Building |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Head, age 29
Polk-County, Iowa · implied b. ~1911 — 5 household members
| Surname | Jackson |
| Given Name | Harold L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Cleaning |
| Industry | Home Service |
| Class of Worker | OA |
| Income (1939) | 520 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Harold Jackson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Harold Jackson
Head · 1940 · age 29 · b. ~1911 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01194-00610)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | William J. Price | 34 | Head | Finisher | Iowa |
| 3 | Leora Price | 27 | Wife | Housewife | Missouri |
| 4 | Gladys D. Greene | 29 | Head | Stenographer | Iowa |
| 5 | Paul L. Mahler | 11 | Son | — | Iowa |
| 6 | Thomas H. Probert | 35 | Head | Laborer | Illinois |
| 7 | Frank D. Johnston | 68 | Head | — | Massachusetts |
| 8 | Addie L. Johnston | 68 | Wife | — | Wisconsin |
| 9 | Joseph J. Spencer | 30 | Head | Laborer | Iowa |
| 10 | Ida B. Spencer | 27 | Wife | Housewife | Iowa |
| 11 | Georganna Spencer | 3 | Daughter | — | Iowa |
| 12 | Ralph S. Davis | 38 | Head | Repairman Furniture | Iowa |
| 13 | Jerry S. Pond | 23 | Head | Station Attendant | Iowa |
| 14 | Vesta L. Pond | 19 | Wife | Waitress | Missouri |
| 16 | Otis E. James | 39 | Head | Janitor | Iowa |
| 17 | Willa B. James | 34 | Wife | Housewife | Alabama |
| 18 | Lawrence O. James | 17 | Son | Shoe Shiner | Iowa |
| 19 | Nelson Thompson | 32 | Head | Clerk | Iowa |
| 20 | Maud O. Thompson | 64 | Mother | Housewife | Missouri |
| 21 | Lilly Clark | 13 | Sister | — | Louisiana |
| 22 | Willie D. Cooley | 30 | Head | — | Tennessee |
| 23 | John H. Cooley | 12 | Son | — | Iowa |
| 24 | Myrtle E. Cooley | 9 | Daughter | — | Iowa |
| 25 | Douglas A. Cooley | 7 | Son | — | Iowa |
| 26 | Lometa E. Cooley | 5 | Daughter | — | Iowa |
| 27 | Donna M. Cooley | 2 | Daughter | — | Iowa |
| 28 | Dan A. Dixon | 43 | Uncle | — | Tennessee |
| 29 | Harold L. Jackson THIS PERSON | 29 | Head | Cleaning | Iowa |
| 30 | Marie E. Jackson | 32 | Wife | Housewife | Iowa |
| 31 | Wenonah G. Jackson | 12 | Daughter | — | Iowa |
| 32 | Harold Jr. Jackson | 7 | Son | — | Iowa |
| 33 | Teresa M. Jackson | 2 | Daughter | — | Iowa |
| 34 | Doris Ellis | 70 | Head | — | Illinois |
| 35 | Helen G. Fitzgerald | 39 | Niece | — | Iowa |
| 36 | Ernest D. Peck | 51 | Head | Houseman | Michigan |
| 37 | Minnie B. Peck | 40 | Wife | Housewife | Alabama |
| 38 | Helen M. Schultz | 19 | Daughter | Seamstress | Iowa |
| 39 | James X. Schultz | 17 | Son | — | Iowa |
| 40 | Elbert Webb | 27 | Lodger | Waiter | Iowa |
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)