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Mary Grimes — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Maricopa-County, Arizona
Our Model Tree links this Mary Grimes across the 1920, 1930 and 1940 US Censuses in Maricopa-County, Arizona (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 3-person household.
Age 52
b. ~1888
Female
Spouse
Born: Kansas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Maricopa-County, Arizona |
| Surname | Grimes |
| Given Name | Mary M. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Supervisors Dist 1 |
| 1935 Residence (County) | Maricopa |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Supervisors Dist 1 |
| Est. Birth Year | ~1888 |
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 |
|---|---|---|---|---|
| Mary Grimes | Spouse | — | 52 | ~1888 |
| Oliver Grimes | Head | — | 58 | ~1882 |
| Ruth Grimes | Daughter | — | 15 | ~1925 |
Census Appearances
1920
Maricopa, Arizona
Spouse, age 32
Maricopa, Arizona · implied b. ~1888 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grimes |
| Given Name | Mary M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Kansas |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Indiana |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Maricopa, Arizona
Other, age 42
Maricopa, Arizona · implied b. ~1888 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grimes |
| Given Name | Mary M |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Kansas |
| Age at First Marriage | 17 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Maricopa-County, Arizona
Spouse, age 52
Maricopa-County, Arizona · implied b. ~1888 — 3 household members
| Surname | Grimes |
| Given Name | Mary M. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Supervisors Dist 1 |
| 1935 Residence (County) | Maricopa |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Grimes 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 Grimes
Spouse · 1940 · age 52 · b. ~1888 · Arizona
★ 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 — Maricopa-County, Arizona
Open full size
1940 US Federal Census — Maricopa-County, Arizona
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00106-00386)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Nettie Hawes | 65 | mother | — | New Mexico |
| 42 | Roy L. Kincaid | 51 | head | Farm Operator | Missouri |
| 43 | Fern R. Kincaid | 40 | wife | — | Arkansas |
| 44 | Blaine Freestone | 39 | head | Farmer Operator | Arizona |
| 45 | Dorothy Freestone | 27 | wife | — | Utah |
| 46 | Shirley Freestone | 4 | daughter | — | Arizona |
| 47 | Charles G. Turner | 32 | head | — | Texas |
| 48 | Margaret R. Turner | 23 | wife | — | Oklahoma |
| 49 | Richard Nelson | 52 | head | Farm Operator | Arizona |
| 50 | Kate Nelson | 38 | wife | — | Arizona |
| 51 | Shirley Nelson | 13 | daughter | — | Arizona |
| 52 | Richard D. Nelson | 10 | son | — | Arizona |
| 53 | Patsy Anne Nelson | 4 | daughter | — | Arizona |
| 54 | Dennis G. Nelson | 0 | son | — | Arizona |
| 55 | Harry Knight | 71 | head | Farm Operator | Pennsylvania |
| 56 | Anna L. Knight | 63 | wife | — | Kansas |
| 57 | John Nicholls | 63 | head | Farm Operator | Michigan |
| 58 | Mary Louise Nicholls | 60 | wife | — | Kansas |
| 59 | Nancy Martin | 47 | head | Farm Labor | Arkansas |
| 60 | Josie Martin | 21 | daughter | House Keeper | Oklahoma |
| 61 | Charles L. Martin | 18 | son | Laborer | Oklahoma |
| 62 | Evelyn Martin | 15 | daughter | — | Oklahoma |
| 63 | Dorothy Martin | 13 | daughter | — | Oklahoma |
| 64 | Flora L. Martin | 7 | daughter | — | Oklahoma |
| 65 | Cecil Mcdonald | 30 | head | Farmer Operator | Texas |
| 66 | Ruth Mcdonald | 36 | wife | — | Texas |
| 67 | Ray H. Horton | 16 | step-son | — | Arizona |
| 68 | Betty R. Horton | 14 | step-daughter | — | California |
| 69 | Gloria J. Horton | 13 | step-daughter | — | Arizona |
| 70 | Patsy Ann Mcdonald | 7 | daughter | — | New Mexico |
| 71 | Robert J. Porter | 52 | head | Cement Finisher | New York |
| 72 | Lea Porter | 36 | wife | — | Louisiana |
| 73 | Le Roy Porter | 18 | son | Paper Boy | Arizona |
| 74 | Charles Porter | 12 | son | Paper Boy | Arizona |
| 75 | Oliver T. Grimes | 58 | head | Truck Driver | Missouri |
| 76 | Mary M. Grimes THIS PERSON | 52 | wife | — | Kansas |
| 77 | Ruth Lou Grimes | 15 | daughter | — | Arizona |
| 78 | Bill Dandridge | 26 | head | Laborer | Texas |
| 79 | Susan Dandridge | 26 | wife | — | Oklahoma |
| 80 | Eugene Dandridge | 3 | son | — | Arizona |
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)