MC
Mary Conner — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Black Hawk, Iowa
Our Model Tree links this Mary Conner across the 1930 and 1940 US Censuses in Black Hawk, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 7-person household.
Age 9
b. ~1921
Female
Daughter
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Black Hawk, Iowa |
| Surname | Conner |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Germany |
| Additional Details | |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Waterloo City |
| Est. Birth Year | ~1921 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Conner | Daughter | — | 7 | ~1923 |
| Kathryn Conner | Daughter | — | 15 | ~1915 |
| Elizabeth Conner | Daughter | — | 13 | ~1917 |
| Helena Conner | Spouse | — | 37 | ~1893 |
| Mary Conner | Daughter | — | 9 | ~1921 |
| Francis Conner | Head | — | 37 | ~1893 |
| Patricia Conner | Daughter | — | 2 | ~1928 |
Census Appearances
1930
Black Hawk, …
Daughter, age 9
Black Hawk, Iowa · implied b. ~1921 — 7 household members
| Surname | Conner |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Daughter, age 19
Black-Hawk-County, Iowa · implied b. ~1921 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conners |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Occupation | Waitress |
| Industry | Cafeteria |
| Class of Worker | PW |
| Hours Worked | 34 |
| Income (1939) | 711 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| 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 Conner across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Conner
Daughter · 1930 · age 9 · b. ~1921 · Iowa
★ You are viewing this record
Sibling
Patricia Conner
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathryn Conner
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Conner
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Conner
Sibling · 1930 · age 7
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
1930 US Federal Census — Black Hawk, Iowa
Open full size
1930 US Federal Census — Black Hawk, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel642:0717)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Paul Looman | 21 | Son | Machinist | Iowa |
| 52 | Percy Looman | 17 | Son | — | Iowa |
| 53 | Charles Looman | 13 | Son | — | Iowa |
| 54 | Bettie Looman | 10 | Daughter | — | Iowa |
| 55 | Doris Looman | 5 | Daughter | — | Iowa |
| 56 | Mary E. Hewitt | 56 | Head | — | Iowa |
| 57 | Laverne E. Dawson | 31 | Son-in-law | Pressman | Iowa |
| 58 | Gladys May Dawson | 29 | Daughter | Book Keeper | Iowa |
| 59 | Paul Hewitt | 17 | Son | Delivery Boy | Iowa |
| 60 | William F. Clark | 38 | Head | Shadowman | Iowa |
| 61 | Clara Clark | 32 | Wife | — | Iowa |
| 62 | Leatha Clark | 8 | Daughter | — | Iowa |
| 63 | Leah Clark | 6 | Daughter | — | Iowa |
| 64 | Duwayne Clark | 4 | Son | — | Iowa |
| 65 | James Clark | 2 | Son | — | Iowa |
| 66 | G. J. Barber | 51 | Head | Laborer | Illinois |
| 67 | Anna Barber | 47 | Wife | Counter Work | Iowa |
| 68 | C. R. Barber | 20 | Son | Truck Driver | Iowa |
| 69 | Mary E. Barber | 16 | Daughter | Cigar Clerk | Iowa |
| 70 | Ethel Bernice Barber | 9 | Daughter | — | Iowa |
| 71 | Roy Monrose | 24 | Head | Machinist Helper | Iowa |
| 72 | Ethel Monrose | 22 | Wife | — | Iowa |
| 73 | Guy Monrose | 3 | Son | — | Iowa |
| 74 | Ralph Mckenney | 23 | Head | Miller Helper | Iowa |
| 75 | Cleo Mckenney | 21 | Wife | — | Michigan |
| 76 | Ira Mulnix | 41 | Head | Common Labor | Iowa |
| 77 | Juanita Mulnix | 32 | Wife | — | Minnesota |
| 78 | Ester Mulnix | 13 | Daughter | — | Minnesota |
| 79 | Mildred Mulnix | 10 | Daughter | — | Minnesota |
| 80 | Ella Mulnix | 7 | Daughter | — | Minnesota |
| 81 | Andrew Mulnix | 5 | Son | — | Minnesota |
| 82 | Andrew Young | 70 | Father-in-law | — | New York |
| 83 | Carl Peterson | 35 | Head | Blacksmith | Iowa |
| 84 | Amanda Peterson | 31 | Wife | — | Iowa |
| 85 | Carlton Peterson | 9 | Son | — | Iowa |
| 86 | Russell Peterson | 7 | Son | — | Iowa |
| 87 | Hans M. Jacobsen | 29 | Head | Delivery Man | Denmark |
| 88 | Lillian Jacobsen | 21 | Wife | — | England |
| 89 | Carl E. Jacobsen | 1 | Son | — | Iowa |
| 90 | Earl Edgerton | 38 | Head | Salesman | Iowa |
| 91 | Gladys Edgerton | 38 | Wife | — | Iowa |
| 92 | Franklin Bidwell | 14 | Roomer | — | Iowa |
| 93 | Dorotha Bidwell | 11 | Roomer | — | Iowa |
| 94 | Francis R. Conner | 37 | Head | Mail Clerk | Illinois |
| 95 | Helena Conner | 37 | Wife | — | Germany |
| 96 | Kathryn Conner | 15 | Daughter | — | Iowa |
| 97 | Elizabeth Conner | 13 | Daughter | — | Iowa |
| 98 | Mary Conner THIS PERSON | 9 | Daughter | — | Iowa |
| 99 | Helen Conner | 7 | Daughter | — | Iowa |
| 100 | Patricia Conner | 2 | Daughter | — | Iowa |
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)