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James Mulligan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Harrison-County, Iowa
Our Model Tree links this James Mulligan across the 1920, 1930 and 1940 US Censuses in Harrison-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 4-person household.
Age 63
b. ~1877
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Harrison-County, Iowa |
| Surname | Mulligan |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Dunlap Town |
| Additional Details | |
| Hours Worked | 20 |
| Income (1939) | 49 |
| Highest Grade | H-4 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Dunlap Town |
| Est. Birth Year | ~1877 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| James Mulligan | Head | — | 63 | ~1877 |
| Francis Mulligan | Son | — | 24 | ~1916 |
| Robt Mulligan | Son | — | 31 | ~1909 |
| Margaret Mulligan | Spouse | — | 59 | ~1881 |
Census Appearances
1920
Harrison, Iowa
Head, age 42
Harrison, Iowa · implied b. ~1878
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Mulligan |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Laborer |
| Industry | Coal Yard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Harrison, Iowa
Head, age 52
Harrison, Iowa · implied b. ~1878 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mulligan |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 27 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Laborer |
| Industry | Elevator |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 12 |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Harrison-County, Iowa
Head, age 63
Harrison-County, Iowa · implied b. ~1877 — 4 household members
| Surname | Mulligan |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Dunlap Town |
| Hours Worked | 20 |
| Income (1939) | 49 |
| Highest Grade | H-4 |
| 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 James Mulligan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
James Mulligan
Head · 1940 · age 63 · b. ~1877 · Iowa
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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 — Harrison-County, Iowa
Open full size
1940 US Federal Census — Harrison-County, Iowa
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01166-00191)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 42 | Louie Jones | 43 | Head | W. P. A. | Iowa |
| 43 | Sine Jones | 37 | Wife | — | Iowa |
| 44 | Marjorie Jones | 19 | Daughter | N. Y. A. | Iowa |
| 45 | Lucile Jones | 17 | Daughter | — | Iowa |
| 46 | Nadine Jones | 14 | Daughter | — | Iowa |
| 47 | Robt Jones | 7 | Son | — | Iowa |
| 48 | Claude Cornelius | 40 | Head | Trucker | Pennsylvania |
| 49 | Clifford Cornelius | 19 | Son | — | Iowa |
| 50 | Darrell Cornelius | 16 | Son | — | Iowa |
| 51 | Elaine Cornelius | 13 | Daughter | — | Iowa |
| 52 | Lila Cornelius | 10 | Daughter | — | Iowa |
| 53 | Rose Ledden | 61 | Head | — | Iowa |
| 54 | Marie Ledden | 37 | Daughter | — | Iowa |
| 55 | William Ledden | 33 | Son | Canvasser | Iowa |
| 56 | Margaret Ledden | 30 | Daughter | — | Iowa |
| 57 | James Ledden | 26 | Son | — | Iowa |
| 58 | Nelle Ledden | 21 | Daughter | House Work | Iowa |
| 59 | Elizabeth Ledden | 18 | Daughter | — | Iowa |
| 60 | Betty Jo Ledden | 4 | Granddau | — | Illinois |
| 61 | Frank Stephens | 36 | Roomer | — | Kentucky |
| 62 | James Mulligan THIS PERSON | 63 | Head | — | Iowa |
| 63 | Margaret Mulligan | 59 | Wife | — | Iowa |
| 64 | Robt Mulligan | 31 | Son | — | Iowa |
| 65 | Francis Mulligan | 24 | Son | — | Iowa |
| 66 | Francis Burke | 54 | Head | Telephone | Iowa |
| 67 | James King | 34 | Nephew | Operator | Nebraska |
| 68 | Thos King | 30 | Nephew | Helper | Nebraska |
| 69 | Stale Avaney | 64 | Sister | — | Ohio |
| 70 | Herman Eggers | 49 | Head | — | Iowa |
| 71 | Laura Eggers | 46 | Wife | Labor | Iowa |
| 72 | Eddie Eggers | 28 | Son | — | Iowa |
| 73 | John Eggers | 25 | Son | — | Iowa |
| 74 | Elmer Eggers | 23 | Son | Laborer | Iowa |
| 75 | Leonard Eggers | 22 | Son | — | Iowa |
| 76 | Homer Eggers | 19 | Son | — | Iowa |
| 77 | Effie Terrell | 55 | Head | — | Iowa |
| 78 | Deonnia Terrell | 13 | Daughter | — | Iowa |
| 79 | Robt Taylor | 28 | Head | Laborer | North Carolina |
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)