MS
Mary Shaffer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this Mary Shaffer across the 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1910), then head of a 9-person household.
Age 30
b. ~1910
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Shaffer |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District No. 9 |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Election District No 9 |
| Est. Birth Year | ~1910 |
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 |
|---|---|---|---|---|
| Mary Shaffer | Daughter | — | 12 | ~1928 |
| Evelyn Shaffer | Daughter | — | 8 | ~1932 |
| Ralph Shaffer | Son | — | 9 | ~1931 |
| Ralph Shaffer | Head | — | 30 | ~1910 |
| Mary Shaffer | Spouse | — | 30 | ~1910 |
| Franklin Shaffer | Son | — | 2 | ~1938 |
| Reva Shaffer | Daughter | — | 1 | ~1939 |
| Elmer Shaffer | Son | — | 3 | ~1937 |
| Helen Shaffer | Daughter | — | 7 | ~1933 |
Census Appearances
1930
Baltimore, Maryland
Other, age 20
Baltimore, Maryland · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shafer |
| Given Name | Mary |
| Relationship to Head | Boarder |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Spouse, age 30
Baltimore-County, Maryland · implied b. ~1910 — 9 household members
| Surname | Shaffer |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District No. 9 |
| 1935 Residence (County) | Baltimore |
| Highest Grade | No 7 |
| 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 Mary Shaffer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Shaffer
Spouse · 1940 · age 30 · b. ~1910 · Maryland
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Baltimore-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01505-00162)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Barbara Pasquith | 6 | Daughter | — | Maryland |
| 42 | Betty Pasquith | 2 | Daughter | — | Maryland |
| 43 | Linwood Francis | 41 | Head | Carpenter | Maryland |
| 44 | Sadie D. Francis | 33 | Wife | — | Maryland |
| 45 | John Francis | 15 | Son | — | Maryland |
| 46 | June Francis | 2 | Daughter | — | Maryland |
| 47 | Stephen Barnes | 41 | Head | Antique Restoration | Poland |
| 48 | Edna Barnes | 30 | Wife | — | North Carolina |
| 49 | Edna Mae Barnes | 2 | Daughter | — | Maryland |
| 50 | Ralph D. Shaffer | 30 | Head | Car Inspector | Pennsylvania |
| 51 | Mary Shaffer THIS PERSON | 30 | Wife | — | Maryland |
| 52 | Mary E. Shaffer | 12 | Daughter | — | Maryland |
| 53 | Ralph Gary Shaffer | 9 | Son | — | Maryland |
| 54 | Evelyn H. Shaffer | 8 | Daughter | — | Maryland |
| 55 | Helen L. Shaffer | 7 | Daughter | — | Maryland |
| 56 | Elmer L. Shaffer | 3 | Son | — | Maryland |
| 57 | Franklin E. Shaffer | 2 | Son | — | Maryland |
| 58 | Reva G. Shaffer | 1 | Daughter | — | Maryland |
| 59 | Charles H. D. Sheffer | 56 | Head | Locomotive Engineer | Maryland |
| 60 | Bertha V. Sheffer | 51 | Wife | — | Maryland |
| 61 | B. Virginia Simms | 14 | Daughter | — | Maryland |
| 62 | William D. Hoerner | 71 | Head | — | D.C. |
| 63 | G. Edward Hoerner | 38 | Son | Farmer | Maryland |
| 64 | Anna Hoerner | 43 | Daughter-in-law | — | New York |
| 65 | Raymond E. Moore | 38 | Head | Truck Driver | Maryland |
| 66 | Mildred E. Moore | 40 | Wife | — | Delaware |
| 67 | Raymond Moore | 13 | Son | — | Maryland |
| 68 | Dolores M. Moore | 10 | Daughter | — | Maryland |
| 69 | C. Eugene Moore | 9 | Son | — | Maryland |
| 70 | Warren E. Moore | 6 | Son | — | Maryland |
| 71 | Gary Moore | 2 | Son | — | Maryland |
| 72 | Clay Stambaugh | 29 | Head | Shovel Engineer | Maryland |
| 73 | Anna D. Stambaugh | 25 | Wife | — | Maryland |
| 74 | Marlene Stambaugh | 5 | Daughter | — | Maryland |
| 75 | Christopher D. Sollinger | 78 | Head | — | Germany |
| 76 | John D. Houston | 73 | Head | — | Maryland |
| 77 | Ira J. D. Houston | 68 | Wife | — | Maryland |
| 78 | Osborne D. Houston | 34 | Son | Coal Merchant | Maryland |
| 79 | Harry Schreiber | 36 | Head | Truck Driver | Maryland |
| 80 | Marion D. Schreiber | 31 | Wife | — | Maryland |
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)