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Mary Lynch — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dubuque-County, Iowa
Our Model Tree links this Mary Lynch across the 1920, 1930 and 1940 US Censuses in Dubuque-County, Iowa (XGBoost, ~Confirmed), with identified parents Joseph & Peter — first a spouse (b.~1913), then head of a 5-person household.
Age 27
b. ~1913
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Dubuque-County, Iowa |
| Surname | Lynch |
| Given Name | Mary G |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Dubuque City |
| 1935 Residence (County) | Dubuque |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Insurance office |
| Class of Worker | PW |
| Hours Worked | 5 |
| Income (1939) | 250 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Stenographer |
| Township / Ward | Dubuque City |
| Est. Birth Year | ~1913 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Lois Lynch | Daughter | — | 5 | ~1935 |
| Virginia Lynch | Daughter | — | 13 | ~1927 |
| Mary Lynch | Daughter | — | 11 | ~1929 |
| Frank Lynch | Head | — | 46 | ~1894 |
| Mary Lynch | Spouse | — | 27 | ~1913 |
Census Appearances
1920
Dubuque, Iowa
Daughter, age 5
Dubuque, Iowa · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Dubuque, Iowa
Daughter, age 15
Dubuque, Iowa · implied b. ~1915 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | Mary Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dubuque-County, Iowa
Spouse, age 27
Dubuque-County, Iowa · implied b. ~1913 — 5 household members
| Surname | Lynch |
| Given Name | Mary G |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Dubuque City |
| 1935 Residence (County) | Dubuque |
| Occupation | Stenographer |
| Industry | Insurance office |
| Class of Worker | PW |
| Hours Worked | 5 |
| Income (1939) | 250 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Lynch across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Lynch (~0.92 confidence) and father Peter Lynch (~0.92 confidence) and mother Susan Lynch (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Lynch
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Peter Lynch
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Susan Lynch
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Lynch
Spouse · 1940 · age 27 · b. ~1913 · Iowa
★ 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 — Dubuque-County, Iowa
Open full size
1940 US Federal Census — Dubuque-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01159-00206)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Lynch | 46 | Head | Underwriter | Iowa |
| 2 | Mary G Lynch THIS PERSON | 27 | Wife | Stenographer | Iowa |
| 3 | Virginia Lynch | 13 | Daughter | — | Iowa |
| 4 | Mary Jane Lynch | 11 | Daughter | — | Iowa |
| 5 | Lois Lynch | 5 | Daughter | — | Iowa |
| 6 | Alvin A Trimplot | 54 | Head | Railway Mail Clerk | Iowa |
| 7 | Anna Trimplot | 53 | Wife | Stenographer | Illinois |
| 8 | Mary Trimplot | 15 | Daughter | Stenographer | Iowa |
| 9 | Richard Trimplot | 13 | Son | — | Iowa |
| 10 | Robert Trimplot | 11 | Son | — | Iowa |
| 12 | William Hazard | 53 | Head | Mechanical Engineer | Michigan |
| 13 | Agnes B Hazard | 52 | Wife | Stenographer | Wisconsin |
| 14 | James Diamond | 51 | Head | Proprietor | Greece |
| 15 | Dorothea Diamond | 40 | Wife | Stenographer | Iowa |
| 16 | Katherine Diamond | 16 | Daughter | Stenographer | Iowa |
| 17 | Felix Leonard | 35 | Head | Department Manager | Minnesota |
| 18 | Jane G Leonard | 31 | Wife | Stenographer | Wisconsin |
| 19 | Kathryn Leonard | 9 | Daughter | — | Wisconsin |
| 20 | Paul Leonard | 6 | Son | — | Iowa |
| 21 | Charles Smith | 38 | Head | Proprietor | Iowa |
| 22 | Elizabeth Smith | 38 | Wife | Stenographer | Iowa |
| 23 | George Smith | 12 | Daughter | Stenographer | Iowa |
| 24 | Margaret Smith | 60 | Mother | Proprietor | Iowa |
| 25 | Jessie Marti | 53 | Head | Teacher | Iowa |
| 26 | Frank Marti | 47 | Brother | Traveling Salesman | Iowa |
| 27 | John Marti | 14 | Nephew | Stenographer | Iowa |
| 28 | Frank B Marti | 82 | Father | Stenographer | France |
| 29 | Gertrude Coffman | 18 | Servant | Servant | Iowa |
| 30 | Robert Beyer | 56 | Head | Salesman | Iowa |
| 31 | Julia O Beyer | 54 | Wife | Stenographer | Illinois |
| 32 | Joseph G Cunningham | 38 | Head | Civil Engineer | Connecticut |
| 33 | Genevieve Cunningham | 32 | Wife | Stenographer | Connecticut |
| 34 | Shirley Cunningham | 12 | Daughter | — | New York |
| 35 | Edward Schneider | 51 | Head | Assistant Sales Manager | Iowa |
| 36 | Mabel G Schneider | 50 | Wife | Stenographer | Iowa |
| 37 | Edward Schneider | 19 | Son | Stenographer | Iowa |
| 38 | James O'Toole | 47 | Head | Salesman | Iowa |
| 39 | Lena G O'Toole | 44 | Wife | Stenographer | Iowa |
| 40 | Frank O'Toole | 17 | Son | Tool Grinder | Iowa |
Pedigree Summary
Mary
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)