MS
Michael Sullivan — 1930 US Census Record
Model Tree available1930 United States Federal Census · Dubuque, Iowa
Our Model Tree links this Michael Sullivan across the 1920, 1930 and 1940 US Censuses in Dubuque, Iowa (XGBoost, ~Confirmed), with identified parents Simon & Mary — first a head (b.~1891), then head of a 9-person household.
Age 39
b. ~1891
Male
Head
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Dubuque, Iowa |
| Surname | Sullivan |
| Given Name | Michael J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Wisconsin |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | VVVV OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Washington Township |
| Est. Birth Year | ~1891 |
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 1930 census.
| Name | Relation to head | Relative to Michael | Age | Birth yr |
|---|---|---|---|---|
| Mary Spain | Daughter | — | 10 | ~1920 |
| Michael Sullivan | Head | — | 39 | ~1891 |
| Mary Sullivan | Other | — | 72 | ~1858 |
| William Sullivan | Other | — | 35 | ~1895 |
| Walter Spain | Other | — | 35 | ~1895 |
| Mary Sullivan | Other | — | 40 | ~1890 |
| Cornelius Spain | Son | — | 7 | ~1923 |
| Simon Spain | Son | — | 11 | ~1919 |
| Catherine Spain | Spouse | — | 27 | ~1903 |
Census Appearances
1920
Dubuque, Iowa
Son, age 29
Dubuque, Iowa · implied b. ~1891 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Michael J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Wisconsin |
| Occupation | farmer |
| Industry | general farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Dubuque, Iowa
Head, age 39
Dubuque, Iowa · implied b. ~1891 — 9 household members
| Surname | Sullivan |
| Given Name | Michael J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Wisconsin |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | VVVV OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dubuque-County, Iowa
Other, age 49
Dubuque-County, Iowa · implied b. ~1891 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Michael |
| Relationship to Head | Brother |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Washington Twp |
| 1935 Residence (County) | Dubuque |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Michael Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Simon Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Simon Sullivan
b. ~1857
Source father
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1862
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Michael Sullivan
Head · 1930 · age 39 · b. ~1891 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Dubuque, Iowa
Open full size
1930 US Federal Census — Dubuque, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel654:0694)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Court John F. Trout | 10 | Son | — | Iowa |
| 52 | Quinten A. Trout | 8 | Son | — | Iowa |
| 53 | Joan E. Trout | 5 | Daughter | — | Iowa |
| 54 | Eugene H. Trout | 1 | Son | — | Iowa |
| 55 | Conrad W. Blosch | 32 | Head | Farmer | Iowa |
| 56 | Mary M. Blosch | 27 | Wife | — | Iowa |
| 57 | Dorothy M. Blosch | 7 | Daughter | — | Iowa |
| 58 | Nella M. Blosch | 7 | Daughter | — | Iowa |
| 59 | Evelyn L. Blosch | 4 | Daughter | — | Iowa |
| 60 | Leonard Blosch | 79 | Father | — | Iowa |
| 61 | George Bartels | 49 | Boarder | Laborer | Iowa |
| 62 | John J. Laughlin | 51 | Head | Farmer | Iowa |
| 63 | Kathryn Long | 51 | Sister | — | Iowa |
| 64 | Thomas H. Long | 50 | Brother | Laborer | Iowa |
| 65 | Leo F. Pancratz | 35 | Head | Farmer | Iowa |
| 66 | Elizabeth S. Pancratz | 36 | Wife | — | Iowa |
| 67 | Thelma L. Pancratz | 11 | Daughter | — | Iowa |
| 68 | Charles J. Pancratz | 9 | Son | — | Iowa |
| 69 | Elizabeth R. Pancratz | 8 | Daughter | — | Iowa |
| 70 | Kenneth R. Pancratz | 6 | Son | — | Iowa |
| 71 | Bernice R. Pancratz | 7 | Daughter | — | Iowa |
| 72 | Leroy J. Pancratz | 3 | Son | — | Iowa |
| 73 | Vivian M. Pancratz | 1 | Daughter | — | Iowa |
| 74 | Frank P. Sweeney | 38 | Head | Farmer | Iowa |
| 75 | Lavina B. Sweeney | 33 | Wife | — | Iowa |
| 76 | A. Elizabeth Sweeney | 10 | Daughter | — | Iowa |
| 77 | Leo J. Sweeney | 8 | Son | — | Iowa |
| 78 | Grace M. Sweeney | 2 | Daughter | — | Iowa |
| 79 | Lela M. Sweeney | 1 | Daughter | — | Iowa |
| 80 | Daniel W. Sullivan | 59 | Head | Farmer | Iowa |
| 81 | Francis L. Carr | 30 | Head | Farmer | Iowa |
| 82 | Celestine A. Carr | 28 | Wife | — | Iowa |
| 83 | Thomas | 29 | Brother | Farmer | Iowa |
| 84 | Joseph L. Sweeney | 33 | Head | Farmer | Iowa |
| 85 | Rita F. Sweeney | 38 | Sister | Teacher | Iowa |
| 86 | James F. Sweeney | 34 | Head | Farmer | Iowa |
| 87 | Agnes G. Sweeney | 34 | Wife | — | Iowa |
| 88 | John F. Sweeney | 1 | Son | — | Iowa |
| 89 | James Lyons | 69 | Head | — | Ohio |
| 90 | Lelia L. Lyons | 29 | Son | Manager | Iowa |
| 91 | Merlin Lyons | 18 | Son | Laborer | Iowa |
| 92 | Michael J. Sullivan THIS PERSON | 39 | Head | Farmer | Iowa |
| 93 | Mary Sullivan | 72 | Mother | — | Wisconsin |
| 94 | Mary A. Sullivan | 40 | Sister | Teacher | Iowa |
| 95 | William L. Sullivan | 35 | Brother | Laborer | Iowa |
| 96 | Walter M. Spain | 35 | — | Laborer | Iowa |
| 97 | Catherine M. Spain | 27 | Wife | — | Iowa |
| 98 | Simon J. Spain | 11 | Son | — | Iowa |
| 99 | Mary R. Spain | 10 | Daughter | — | Iowa |
| 100 | Cornelius C. Spain | 7 | Son | — | Iowa |
Pedigree Summary
Michael
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)