MC
Mary Clark — 1930 US Census Record
Model Tree available1930 United States Federal Census · Essex, Massachusetts
Our Model Tree links this Mary Clark across the 1910, 1920 and 1930 US Censuses in Essex, Massachusetts (XGBoost, ~Confirmed), with identified parents Stacy & Stacey — first a daughter (b.~1907), then head of a 4-person household.
Age 23
b. ~1907
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, Massachusetts |
| Surname | Clark |
| Given Name | Mary R. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Marblehead Town |
| Est. Birth Year | ~1907 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Emma Clark | Daughter | — | 16 | ~1914 |
| Mary Clark | Daughter | — | 23 | ~1907 |
| Stacey Clark | Head | — | 51 | ~1879 |
| Emma Clark | Spouse | — | 53 | ~1877 |
Census Appearances
1910
Essex, Massachusetts
Daughter, age 3
Essex, Massachusetts · implied b. ~1907 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Mary R |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Essex, Massachusetts
Daughter, age 13
Essex, Massachusetts · implied b. ~1907 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Mary R |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Daughter, age 23
Essex, Massachusetts · implied b. ~1907 — 4 household members
| Surname | Clark |
| Given Name | Mary R. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Clark across 3 US Census years (1910, 1920 and 1930) in Essex, Massachusetts, using XGBoost record linkage. Identified parents: father Stacy Clark (~0.92 confidence) and father Stacey Clark (~0.92 confidence) and mother Emma Clark (~0.92 confidence) and mother Emma Clark (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Stacy Clark
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Stacey Clark
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Emma Clark
b. ~1874
Source mother
● Household
· direct · ~0.92
Mother
Emma Clark
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Clark
Daughter · 1930 · age 23 · b. ~1907 · Massachusetts
★ You are viewing this record
Sibling
Emma Clark
Sibling · 1930 · age 16
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 — Essex, Massachusetts
Open full size
1930 US Federal Census — Essex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel901:0106)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Russell Trefry | 27 | Head | — | Massachusetts |
| 2 | Elizabeth Trefry | 26 | Wife | — | Massachusetts |
| 3 | Carol Trefry | 4 | Daughter | — | Massachusetts |
| 4 | Herbert Caswell | 30 | Head | Clerk | Massachusetts |
| 5 | Alice P. Caswell | 27 | Wife | — | Massachusetts |
| 6 | Herbert J. Caswell | 6 | Son | — | Massachusetts |
| 7 | James Caswell | 4 | Son | — | Massachusetts |
| 8 | Rose M. Caswell | 63 | Head | — | Massachusetts |
| 9 | Alice M. Caswell | 24 | Daughter | Bookkeeper | Massachusetts |
| 10 | Bridget Dorsey | 62 | Head | — | Irish Free State |
| 11 | Harry R. Dorsey | 40 | Son | Ironer | Massachusetts |
| 12 | Amos Bernard | 29 | Head | Section Hand | Massachusetts |
| 13 | Sarah M. Bernard | 28 | Wife | — | Massachusetts |
| 14 | Lillian Bernard | 6 | Daughter | — | Massachusetts |
| 15 | Frank E. Rodgers | 50 | Head | Mechanic | Massachusetts |
| 16 | Annie Rodgers | 53 | Wife | — | Massachusetts |
| 17 | Samuel B. Stone | 73 | Head | Janitor | Massachusetts |
| 18 | Mary E. Stone | 69 | Wife | — | Massachusetts |
| 19 | Samuel S. Stone | 36 | Head | Fireman | Massachusetts |
| 20 | Ida M. Stone | 34 | Wife | — | Massachusetts |
| 21 | Catherine Stone | 5 | Daughter | — | Massachusetts |
| 22 | Barbara M. Stone | 1 | Daughter | — | Massachusetts |
| 23 | Robert M. Henderson | 41 | Head | Shipper | Massachusetts |
| 24 | Florence Henderson | 41 | Wife | — | Massachusetts |
| 25 | Georgeanna Henderson | 21 | Daughter | Teacher | Massachusetts |
| 26 | Robert Henderson | 10 | Daughter | — | Massachusetts |
| 27 | Augustin Simard | 63 | Head | Cutter | Canada French |
| 28 | Mary Simard | 62 | Wife | — | New York |
| 29 | Edward Carder | 23 | Lodger | Carpenter | Massachusetts |
| 30 | Stacey H. Clark | 51 | Head | Manager | Massachusetts |
| 31 | Emma Clark | 53 | Wife | — | Massachusetts |
| 32 | Mary R. Clark THIS PERSON | 23 | Daughter | — | Massachusetts |
| 33 | Emma G. Clark | 16 | Daughter | — | Massachusetts |
| 34 | Ernest Clough | 32 | Head | Journalist | Maine |
| 35 | Helen Clough | 32 | Wife | — | Massachusetts |
| 36 | Stephen Goodwin | 69 | Head | Real Estate | Canada English |
| 37 | Harriet Goodwin | 66 | Wife | Laborer | Canada English |
| 38 | Emma Goodwin | 17 | Granddaughter | — | Canada English |
| 39 | Fred Russell | 51 | Head | Operator | Massachusetts |
| 40 | Carrie Russell | 39 | Wife | Tailor | Massachusetts |
| 41 | Carrie A. Russell | 20 | Daughter | — | Massachusetts |
| 42 | Jane R. Russell | 19 | Daughter | Stenographer | Massachusetts |
| 43 | William H. Russell | 17 | Son | Chauffeur | Massachusetts |
| 44 | Margaret M. Russell | 15 | Daughter | — | Massachusetts |
| 45 | Ruth E. Russell | 14 | Daughter | — | Massachusetts |
| 46 | Irene Russell | 12 | Son | — | Massachusetts |
| 47 | John M. Russell | 12 | Son | — | Massachusetts |
| 48 | Francis Russell | 10 | Married | — | Massachusetts |
| 49 | Donald Russell | 9 | Son | — | Massachusetts |
| 50 | Claire Russell | 6 | Daughter | — | Massachusetts |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 4 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)