MC
Mary Costa — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Santa-Barbara-County, California
Our Model Tree links this Mary Costa across the 1920, 1930 and 1940 US Censuses in Santa-Barbara-County, California (XGBoost, ~Confirmed) — first a head (b.~1881), then head of a 3-person household.
Age 59
b. ~1881
Female
Head
Born: Greece
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Santa-Barbara-County, California |
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Widowed |
| Birthplace | Greece |
| 1935 Residence (City) | Santa Barbara City |
| 1935 Residence (County) | Santa Barbara |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 8 |
| 1935 Residence | Same Place |
| Birth Country | Greece |
| Birthplace (normalized) | greece |
| Township / Ward | Santa Barbara City |
| Est. Birth Year | ~1881 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Felix Costa | Son | — | 24 | ~1916 |
| Mary Costa | Head | — | 59 | ~1881 |
| John Costa | Son | — | 21 | ~1919 |
Census Appearances
1920
Santa Barbara, …
Spouse, age 38
Santa Barbara, California · implied b. ~1882 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costos |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Greece |
| Year of Immigration | 1907 |
| Naturalization Status | Alien |
| Father's Birthplace | Greece |
| Mother's Birthplace | Greece |
| Occupation | none |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Mother Tongue | Greek |
| Birth Country | Greece |
| Birthplace (normalized) | greece |
1930
Santa Barbara, …
Head, age 50
Santa Barbara, California · implied b. ~1880 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costas |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Widowed |
| Birthplace | Greece |
| Naturalization Status | Alien |
| Year of Immigration | 1907 |
| Father's Birthplace | Greece |
| Mother's Birthplace | Greece |
| Class of Worker | W |
| Can Read/Write | No |
| Mother Tongue | Greek |
| Home Owned/Rented | O |
| Home Value / Rent | 9000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Greece |
| Birthplace (normalized) | greece |
1940
Santa-Barbara-County, California
Head, age 59
Santa-Barbara-County, California · implied b. ~1881 — 3 household members
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Widowed |
| Birthplace | Greece |
| 1935 Residence (City) | Santa Barbara City |
| 1935 Residence (County) | Santa Barbara |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | H 8 |
| 1935 Residence | Same Place |
| Birth Country | Greece |
| Birthplace (normalized) | greece |
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 Costa across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Costa
Head · 1940 · age 59 · b. ~1881 · California
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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 — Santa-Barbara-County, California
Open full size
1940 US Federal Census — Santa-Barbara-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00333-00579)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Walter B. Fultz | 66 | Head | Painter | Ohio |
| 42 | Francis I. Fultz | 57 | Wife | — | Ohio |
| 43 | John D. Clark | 52 | Head | Civil Eng. | Georgia |
| 44 | Glenn C. Jones | 30 | Head | Bartender | Oregon |
| 45 | Juliet R. Cotton | 75 | Head | — | Indiana |
| 46 | Mildred Cotton | 53 | Daughter | Sales Lady | Kansas |
| 47 | Clarence Cotton | 19 | Grandson | Deliveryman | California |
| 48 | John S. Atkinson | 30 | Head | Office Mgr | Missouri |
| 49 | Isabel Atkinson | 24 | Wife | — | California |
| 50 | Lawrence W. Bates | 64 | Head | Real Estate | Iowa |
| 51 | Katherine Bates | 57 | Wife | — | England |
| 52 | Mary Costa THIS PERSON | 59 | Head | — | Greece |
| 53 | Felix Costa | 24 | Son | Laborer | California |
| 54 | John Costa | 21 | Son | Merchant | California |
| 55 | George Papas | 47 | Head | Restaurant Owner | Greece |
| 56 | Lizzie R. Milne | 56 | Head | — | Scotland |
| 57 | James Milne | 54 | Husband | Carpenter | Scotland |
| 58 | James R. Milne | 28 | Son | — | Pennsylvania |
| 59 | David G. Milne | 22 | Son | Truck Driver | California |
| 60 | William Milne | 79 | Head | — | Scotland |
| 61 | Sam Tsoutsouras | 57 | Head | Merchant | Greece |
| 62 | Elaine Tsoutsouras | 55 | Wife | — | Greece |
| 63 | Louis Tsoutsouras | 25 | Son | Laborer | California |
| 64 | John Tsoutsouras | 22 | Son | Chauffeur | California |
| 65 | Mary Tsoutsouras | 21 | Daughter | Drug Store | — |
| 66 | Della Els | 36 | Head | — | California |
| 67 | Richard Els | 4 | Son | — | California |
| 68 | Joan Els | 2 | Daughter | — | California |
| 69 | Francis P. Hunsaker | 33 | Head | Laborer | Nebraska |
| 70 | Helen Hunsaker | 24 | Wife | — | California |
| 71 | Helen E. Hunsaker | 4 | Daughter | — | California |
| 72 | Norma Lee Hunsaker | 2 | Daughter | — | California |
| 73 | Herbert Bernarr | 41 | Head | Life Guard | Texas |
| 74 | Emma Bernarr | 31 | Wife | — | Arizona |
| 75 | Edith Knealling | 29 | Sister-in-law | Bookkeeper | Arizona |
| 76 | Charles F. Wilson | 38 | Head | Gardener | Illinois |
| 77 | Ellen Wilson | 31 | Wife | — | California |
| 78 | Charlotte Wilson | 6 | Daughter | — | California |
| 79 | Herman Wilson | 2 | Son | — | California |
| 80 | Joseph L. Fraga | 81 | Head | Janitor | Portugal |
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)