RS
Richard Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dubuque-County, Iowa
Our Model Tree links this Richard Sullivan across the 1920, 1930 and 1940 US Censuses in Dubuque-County, Iowa (XGBoost, ~Confirmed), with identified parents Leo & Leo — first a son (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dubuque-County, Iowa |
| Surname | Sullivan |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Dubuque |
| 1935 Residence (County) | Dubuque |
| Additional Details | |
| Occupation | Raw worker |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 600 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Raw Worker |
| Township / Ward | Dubuque |
| Est. Birth Year | ~1918 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Richard | Age | Birth yr |
|---|---|---|---|---|
| Anna Sullivan | Spouse | — | 56 | ~1884 |
| Anna Sullivan | Daughter | — | 17 | ~1923 |
| Leo Sullivan | Head | — | 54 | ~1886 |
| Richard Sullivan | Son | — | 22 | ~1918 |
Census Appearances
1920
Dubuque, Iowa
Son, age 2
Dubuque, Iowa · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| 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
Son, age 12
Dubuque, Iowa · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Richard D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| 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
Son, age 22
Dubuque-County, Iowa · implied b. ~1918 — 4 household members
| Surname | Sullivan |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Dubuque |
| 1935 Residence (County) | Dubuque |
| Occupation | Raw worker |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 600 |
| Highest Grade | Hs 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 Richard Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Leo Sullivan (~0.92 confidence) and father Leo Sullivan (~0.92 confidence) and father Leo Sullivan (~0.92 confidence) and mother Anna Sullivan (~0.92 confidence) and mother Anna Sullivan (~0.92 confidence) and mother Anna Sullivan (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Leo Sullivan
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Leo Sullivan
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Leo Sullivan
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Anna Sullivan
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Anna Sullivan
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Anna Sullivan
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Richard Sullivan
Son · 1940 · age 22 · b. ~1918 · Iowa
★ You are viewing this record
Sibling
Anna Sullivan
Sibling · 1940 · age 17
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 — Dubuque-County, Iowa
Open full size
1940 US Federal Census — Dubuque-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01159-00421)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Richard Duggan | 76 | Brother | — | Illinois |
| 42 | Fred Lipprain | 36 | Head | Truck Driver | Iowa |
| 43 | Elsie Lipprain | 32 | Wife | — | Michigan |
| 44 | Laura Lipprain | 15 | Daughter | — | Iowa |
| 45 | Carl Lipprain | 10 | Son | — | Iowa |
| 46 | Floyd Lipprain | 9 | Son | — | Iowa |
| 47 | Betty Lipprain | 7 | Daughter | — | Iowa |
| 48 | Rose Lipprain | 5 | Daughter | — | Iowa |
| 49 | Leo J. Sullivan | 54 | Head | Laborer | Iowa |
| 50 | Anna Sullivan | 56 | Wife | — | Iowa |
| 51 | Richard Sullivan THIS PERSON | 22 | Son | Raw Worker | Iowa |
| 52 | Anna M. Sullivan | 17 | Daughter | — | Iowa |
| 53 | John Welp | 44 | Head | Proprietor | Illinois |
| 54 | Frieda Welp | 35 | Wife | — | Iowa |
| 55 | John R. Welp | 3 | Son | — | Iowa |
| 56 | Joseph Donahue | 43 | Head | Switchman | Iowa |
| 57 | Myrtle Donahue | 40 | Wife | — | Iowa |
| 58 | Melvin Donahue | 17 | Son | Driver | Iowa |
| 59 | John Donahue | 14 | Son | — | Iowa |
| 60 | John H. Donahue | 69 | Head | Laborer | Iowa |
| 61 | Kathryn Donahue | 62 | Wife | — | New York |
| 62 | Melvin Donahue | 33 | Son | Brakeman | Iowa |
| 63 | Frank Wyburn | 52 | Head | Laborer | Wisconsin |
| 64 | Laurine Wyburn | 52 | Wife | — | Wisconsin |
| 65 | Alfred Wyburn | 27 | Son | Laborer | Iowa |
| 66 | Laurine Blank | 10 | Granddaughter | — | Iowa |
| 67 | Herman Cooper | 32 | Head | Laborer | Iowa |
| 68 | Pauline Cooper | 27 | Wife | — | Iowa |
| 69 | Geraldine Cooper | 2 | Daughter | — | Iowa |
| 70 | Carol Miller | 25 | Head | Laborer | Iowa |
| 71 | Beata Miller | 22 | Wife | — | Iowa |
| 72 | Karl Miller | 2 | Son | — | Iowa |
| 73 | William Miller | 1 | Son | — | Iowa |
| 74 | Harold Coyle | 25 | Head | Glazer | Iowa |
| 75 | Laura Coyle | 20 | Wife | — | Wisconsin |
| 76 | Harold Jr. Coyle | 3 | Son | — | Iowa |
| 77 | Bonnie Coyle | 1 | Daughter | — | Iowa |
| 78 | William Lyons | 22 | Head | Laborer | Iowa |
| 79 | Lucille Lyons | 17 | Wife | — | Iowa |
| 80 | Donna R. Lyons | 0 | Daughter | — | Iowa |
Pedigree Summary
Richard + 1 sibling
Gen 1 · 6 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)