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Mary Briggs — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lucas-County, Iowa
Our Model Tree links this Mary Briggs across the 1930 and 1940 US Censuses in Lucas-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1902), then head of a 9-person household.
Age 38
b. ~1902
Female
Spouse
Born: Missouri
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lucas-County, Iowa |
| Surname | Briggs |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Lincoln Township |
| 1935 Residence (County) | Lucas |
| Additional Details | |
| Industry | No |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Lincoln Township |
| Est. Birth Year | ~1902 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Waneta Briggs | Daughter | — | 7 | ~1933 |
| Rex Briggs | Son | — | 12 | ~1928 |
| Gene Briggs | Son | — | 14 | ~1926 |
| Mary Briggs | Spouse | — | 38 | ~1902 |
| Yvonne Briggs | Daughter | — | 3 | ~1937 |
| Ruth Briggs | Daughter | — | 10 | ~1930 |
| Louise Briggs | Daughter | — | 16 | ~1924 |
| Ernest Briggs | Son | — | 19 | ~1921 |
| Pearl Briggs | Head | — | 38 | ~1902 |
Census Appearances
1930
Lucas, Iowa
Spouse, age 28
Lucas, Iowa · implied b. ~1902 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Briggs |
| Given Name | Mary M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Missouri |
| Age at First Marriage | 19 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Lucas-County, Iowa
Spouse, age 38
Lucas-County, Iowa · implied b. ~1902 — 9 household members
| Surname | Briggs |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Lincoln Township |
| 1935 Residence (County) | Lucas |
| Industry | No |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Briggs across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Briggs
Spouse · 1940 · age 38 · b. ~1902 · 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 — Lucas-County, Iowa
Open full size
1940 US Federal Census — Lucas-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01178-00636)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas Jr Reid | 6 | Son | — | Iowa |
| 2 | Carol Jane Reid | 3 | Daughter | — | Iowa |
| 3 | Clayton Reid | 0 | Son | — | Iowa |
| 4 | Fred Swinscoe | 38 | Head | Farmer | Iowa |
| 5 | Rose Swinscoe | 37 | Wife | — | Iowa |
| 6 | Emma Swinscoe | 17 | Daughter | — | Iowa |
| 7 | Margaret Swinscoe | 14 | Daughter | — | Iowa |
| 8 | Imogene Swinscoe | 10 | Daughter | — | Iowa |
| 9 | Pearl Briggs | 38 | Head | Laborer | Iowa |
| 10 | Mary Briggs THIS PERSON | 38 | Wife | — | Missouri |
| 11 | Ernest Briggs | 19 | Son | — | Iowa |
| 12 | Louise Briggs | 16 | Daughter | — | Iowa |
| 13 | Gene Briggs | 14 | Son | — | Iowa |
| 14 | Rex Briggs | 12 | Son | — | Iowa |
| 15 | Ruth Briggs | 10 | Daughter | — | Iowa |
| 16 | Waneta Briggs | 7 | Daughter | — | Iowa |
| 17 | Yvonne Briggs | 3 | Daughter | — | Iowa |
| 18 | Gail Chowser | 36 | Head | Laborer | Iowa |
| 19 | Lola Chowser | 34 | Wife | — | Iowa |
| 20 | Lois Chowser | 15 | Daughter | — | Iowa |
| 21 | Donna J. Chowser | 10 | Daughter | — | Iowa |
| 22 | Bobby Chowser | 6 | Son | — | Iowa |
| 23 | Walter Cain | 32 | Head | Farmer | Iowa |
| 24 | Catherine Cain | 27 | Wife | — | Iowa |
| 25 | Elizabeth Cain | 5 | Daughter | — | Iowa |
| 26 | Robert Cain | 2 | Son | — | Iowa |
| 27 | Jess Merrill | 37 | Head | Miner | Iowa |
| 28 | Maude Merrill | 34 | Wife | — | Iowa |
| 29 | Shirley Merrill | 17 | Daughter | New Worker | Iowa |
| 30 | Madonna Merrill | 10 | Daughter | — | Iowa |
| 31 | Jesse Merrill | 9 | Son | — | Iowa |
| 32 | Tommie Merrill | 7 | Son | — | Iowa |
| 33 | Weaver Griffin | 59 | Head | Farmer | Iowa |
| 34 | Charles Griffin | 65 | Brother | Farm Laborer | Iowa |
| 35 | Daisy Griffin | 63 | Sister | — | Iowa |
| 36 | Earl Thompson | 26 | Head | Farmer | Iowa |
| 37 | Arylis Thompson | 28 | Wife | — | Iowa |
| 38 | Ellis Thompson | 56 | Head | Farmer | Kansas |
| 39 | William Thompson | 30 | Son | Farm Laborer | Iowa |
| 40 | Fern A Thompson | 25 | Daughter | — | 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)