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Mary Lang — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Bayfield-County, Wisconsin
Our Model Tree links this Mary Lang across the 1930 and 1940 US Censuses in Bayfield-County, Wisconsin (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 8-person household.
Age 10
b. ~1930
Female
Daughter
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Bayfield-County, Wisconsin |
| Surname | Lang |
| Given Name | Mary A. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Drummond Bayfield |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Wisconsin |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Township / Ward | Township Cable |
| Est. Birth Year | ~1930 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Lawrence Lang | Son | — | 11 | ~1929 |
| John Lang | Head | — | 42 | ~1898 |
| Robert Lang | Son | — | 5 | ~1935 |
| Mary Lang | Daughter | — | 10 | ~1930 |
| Leona Lang | Daughter | — | 14 | ~1926 |
| Katherine Lang | Daughter | — | 16 | ~1924 |
| Magdalene Lang | Daughter | — | 18 | ~1922 |
| Ethel Lang | Spouse | — | 39 | ~1901 |
Census Appearances
1930
Bayfield, Wisconsin
Daughter, age
Bayfield, Wisconsin · implied b. ~1930 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lang |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Austria |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Bayfield-County, Wisconsin
Daughter, age 10
Bayfield-County, Wisconsin · implied b. ~1930 — 8 household members
| Surname | Lang |
| Given Name | Mary A. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Drummond Bayfield |
| Highest Grade | 4 |
| 1935 Residence | Wisconsin |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 Lang across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Lang
Daughter · 1940 · age 10 · b. ~1930 · Wisconsin
★ You are viewing this record
Sibling
Magdalene Lang
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Lang
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leona Lang
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Lang
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Lang
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Bayfield-County, Wisconsin
Open full size
1940 US Federal Census — Bayfield-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04458-00118)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marjory J. Harvey | 16 | daughter | House Work | Wisconsin |
| 2 | Warren C. Harvey | 13 | son | Day Work | Wisconsin |
| 3 | Marvin L. Harvey | 9 | son | — | Wisconsin |
| 4 | Victor H. Jr. Harvey | 5 | son | — | Wisconsin |
| 5 | Arthur Larson | 27 | Head | Farm Hand | Wisconsin |
| 6 | Phyllis Larson | 21 | Wife | Clerk | Wisconsin |
| 7 | Judith M. Larson | 1 | daughter | — | Wisconsin |
| 8 | Clarence Jr. Holly | 27 | Head | Mill Hand | Wisconsin |
| 9 | Verna R. Holly | 22 | Wife | — | Wisconsin |
| 10 | Raymond E. Holly | 6 | son | — | Wisconsin |
| 11 | Donna F. Holly | 3 | daughter | — | Wisconsin |
| 12 | Norman L. Holly | 2 | son | — | Wisconsin |
| 13 | Harry Rogan | 34 | Head | Mechanic | Wisconsin |
| 14 | Idarrell Caster | 26 | Head | Mill Hand | Wisconsin |
| 15 | Laura E. Caster | 26 | Wife | — | Wisconsin |
| 16 | Marguirea M. Caster | 5 | daughter | — | Louisiana |
| 17 | John Lang | 42 | Head | Mill Hand | Hungary |
| 18 | Ethel Lang | 39 | Wife | — | Minnesota |
| 19 | Magdalene M. Lang | 18 | daughter | Waitress | Minnesota |
| 20 | Katherine Lang | 16 | daughter | — | Wisconsin |
| 21 | Leona P. Lang | 14 | daughter | — | Wisconsin |
| 22 | Lawrence J. Lang | 11 | son | — | Wisconsin |
| 23 | Mary A. Lang THIS PERSON | 10 | daughter | — | Wisconsin |
| 24 | Robert O. Lang | 5 | son | — | Wisconsin |
| 25 | William Lerche | 73 | Head | Retired Surgeon | Norway |
| 26 | Sarah Lerche | 57 | Wife | — | Wisconsin |
| 27 | Maurice F. Monson | 50 | Head | Carpenter | Wisconsin |
| 28 | Laura Monson | 49 | Wife | — | Wisconsin |
| 29 | Maurlin D. Monson | 24 | son | Odd Jobs | Wisconsin |
| 30 | Donald J. Monson | 21 | son | Carpenter | Wisconsin |
| 31 | Pearl E. Monson | 19 | daughter | Waitress | Wisconsin |
| 32 | Frank J. Reed | 55 | Head | Farmer | Illinois |
| 33 | Ida S. Reed | 47 | Wife | — | Minnesota |
| 34 | Betty Reed | 17 | daughter | Clerical Work | Minnesota |
| 35 | James E. Reed | 15 | son | Odd Jobs | Minnesota |
| 36 | Jack L. Reed | 14 | son | — | Minnesota |
| 37 | Willis Jr. Reed | 11 | son | — | Wisconsin |
| 38 | Allen W. Reed | 9 | son | — | Wisconsin |
| 39 | Lillian R. Reed | 8 | daughter | — | Wisconsin |
| 40 | George E. Levitt | 29 | Head | Road Patrolman | Wisconsin |
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)