MJ
Mary Jackson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Duval-County, Florida
Our Model Tree links this Mary Jackson across the 1920, 1930 and 1940 US Censuses in Duval-County, Florida (XGBoost, ~Confirmed) — first a spouse (b.~1911), then head of a 4-person household.
Age 29
b. ~1911
Female
Spouse
Born: Florida
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Duval-County, Florida |
| Surname | Jackson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Florida |
| 1935 Residence (City) | Jacksonville |
| 1935 Residence (County) | Duval |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
| Township / Ward | Jacksonville |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Jennie Jackson | Daughter | — | 12 | ~1928 |
| Tyler Jackson | Head | — | 42 | ~1898 |
| Joseph Jackson | Son | — | 8 | ~1932 |
| Mary Jackson | Spouse | — | 29 | ~1911 |
Census Appearances
1920
Duval, Florida
Other, age 9
Duval, Florida · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jackson |
| Given Name | Mary |
| Relationship to Head | Roomer |
| Sex | F |
| Color / Race | Black |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Florida |
| Father's Birthplace | Florida |
| Mother's Birthplace | Florida |
| Speaks English | Yes |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
1930
Duval, Florida
Other, age 19
Duval, Florida · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jackson |
| Given Name | Mary |
| Relationship to Head | Roomer |
| Sex | F |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Married |
| Birthplace | Florida |
| Age at First Marriage | 16 |
| Father's Birthplace | Florida |
| Mother's Birthplace | Virginia |
| Occupation | Washerwoman |
| Industry | at home |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
1940
Duval-County, Florida
Spouse, age 29
Duval-County, Florida · implied b. ~1911 — 4 household members
| Surname | Jackson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Florida |
| 1935 Residence (City) | Jacksonville |
| 1935 Residence (County) | Duval |
| Industry | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
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 Mary Jackson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Jackson
Spouse · 1940 · age 29 · b. ~1911 · Florida
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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 — Duval-County, Florida
Open full size
1940 US Federal Census — Duval-County, Florida
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00624-00424)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Nina Louise Melony | 15 | Daughter | — | Florida |
| 2 | Martin Wilks | 67 | Head | Cook | Florida |
| 3 | Lottie Wilks | 58 | Wife | — | Florida |
| 4 | Martin Wilks | 11 | Son | — | Florida |
| 5 | Zelia Walker | 38 | Head | Maid | Florida |
| 6 | Tyler Jackson | 42 | Head | Mortar Mixer | Georgia |
| 7 | Mary Jackson THIS PERSON | 29 | Wife | — | Florida |
| 8 | Jennie Kate Jackson | 12 | Daughter | — | Georgia |
| 9 | Joseph Jackson | 8 | Son | — | Georgia |
| 10 | Dora Highsmith | 32 | Head | Cook | Georgia |
| 11 | Lilly Mae Highsmith | 16 | Daughter | — | Florida |
| 12 | Lonnie Baker | 33 | Lodger | Laborer | Georgia |
| 13 | Willie Jordan | 31 | Head | Mechanic | Georgia |
| 14 | Hazel Jordan | 38 | Wife | — | Florida |
| 15 | Ellen Sanford | 30 | Head | Cook | Florida |
| 16 | Samuel Sanford | 17 | Son | Laborer | Florida |
| 17 | Thelma Sanford | 16 | Daughter | — | Florida |
| 18 | Elizabeth Sanford | 15 | Daughter | — | Florida |
| 19 | Arthur Labb | 23 | Lodger | Laborer | Florida |
| 20 | Mary Louise Labb | 19 | Daughter | — | Florida |
| 21 | Tom Attmore | 40 | Head | Laborer | Florida |
| 22 | Lillie Belle Attmore | 32 | Wife | Cook | Florida |
| 23 | Arthur Ferguson | 35 | Head | Porter | Florida |
| 24 | Lea Ferguson | 37 | Wife | — | Georgia |
| 25 | Eulalee Powell | 49 | Head | Cook | Florida |
| 26 | Alphonso Coleman | 27 | Head | Laborer | Florida |
| 27 | Alma Coleman | 19 | Wife | Maid | Georgia |
| 28 | Alta Mae Coleman | 0 | Daughter | — | Florida |
| 29 | Willie Jones | 31 | Lodger | Porter | Florida |
| 30 | Sammie Chelaney | 45 | Lodger | Auto Mechanic | Florida |
| 31 | Shadrack Mitchell | 36 | Head | Mechanic | Georgia |
| 32 | Sophie Mitchell | 27 | Wife | — | Georgia |
| 33 | Louise Mitchell | 9 | Daughter | — | Florida |
| 34 | Solomon Mitchell | 5 | Son | — | Florida |
| 35 | Gloria Mitchell | 2 | Daughter | — | Florida |
| 36 | Lucille Mitchell | 65 | Mother | Presser | North Carolina |
| 37 | Black Ends | None | Head | — | — |
| 38 | Willie Jones | 48 | Head | Cutter | Florida |
| 39 | Annie Jones | 41 | Wife | Cleaner | Georgia |
| 40 | Alta Mae Davis | 15 | Daughter | — | Florida |
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)