RM
Richard Murphy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Francisco, California
Our Model Tree links this Richard Murphy across the 1920 and 1930 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 13-person household.
Age 11
b. ~1919
Male
Son
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Murphy |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1919 |
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.
13 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Richard | Age | Birth yr |
|---|---|---|---|---|
| Mary Murphy | Daughter | — | 9 | ~1921 |
| William Murphy | Son | — | 13 | ~1917 |
| John Murphy | Son | — | 25 | ~1905 |
| Mary Murphy | Spouse | — | 55 | ~1875 |
| Catherine Murphy | Daughter | — | 7 | ~1923 |
| Patrick Murphy | Head | — | 60 | ~1870 |
| Baby Murphy | Son | — | 5 | ~1925 |
| Margaret Murphy | Daughter | — | 21 | ~1909 |
| Alice Murphy | Daughter | — | 17 | ~1913 |
| Robert Murphy | Son | — | 15 | ~1915 |
| Thomas Murphy | Son | — | 19 | ~1911 |
| James Murphy | Son | — | 23 | ~1907 |
| Richard Murphy | Son | — | 11 | ~1919 |
Census Appearances
1920
San Francisco, …
Son, age 1
San Francisco, California · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Murphy |
| Given Name | Richard |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Mother Tongue | English |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Son, age 11
San Francisco, California · implied b. ~1919 — 13 household members
| Surname | Murphy |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Murphy across 2 US Census years (1920 and 1930) in San Francisco, California, using XGBoost record linkage.
Show:
This person
Anchor record
Richard Murphy
Son · 1930 · age 11 · b. ~1919 · California
★ You are viewing this record
Sibling
Baby Murphy
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Murphy
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Murphy
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Murphy
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Murphy
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Murphy
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Murphy
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Murphy
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Murphy
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Murphy
Sibling · 1930 · age 13
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 — San Francisco, California
Open full size
1930 US Federal Census — San Francisco, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel202:0866)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Grace Guerin | 18 | Daughter | Stenographer | California |
| 52 | John Guerin | 16 | Son | — | California |
| 53 | James Guerin | 14 | Son | — | California |
| 54 | Margaret Guerin | 12 | Daughter | — | California |
| 55 | Catherine Guerin | 10 | Daughter | — | California |
| 56 | Thomas Guerin | 8 | Son | — | California |
| 57 | Alice Guerin | 6 | Daughter | — | California |
| 58 | Robert Guerin | 4 | Son | — | California |
| 59 | William Guerin | 2 | Son | — | California |
| 60 | Richard Guerin | 1 | Son | — | California |
| 61 | Mary Guerin | 0 | Daughter | — | California |
| 62 | John O'Brien | 45 | Head | Laborer | Ireland |
| 63 | Mary O'Brien | 40 | Wife | — | Ireland |
| 64 | John O'Brien | 18 | Son | — | California |
| 65 | James O'Brien | 16 | Son | Helper | California |
| 66 | Margaret O'Brien | 14 | Daughter | — | California |
| 67 | Thomas O'Brien | 12 | Son | — | California |
| 68 | Alice O'Brien | 10 | Daughter | — | California |
| 69 | Robert O'Brien | 8 | Son | — | California |
| 70 | William O'Brien | 6 | Son | — | California |
| 71 | Richard O'Brien | 4 | Son | — | California |
| 72 | Mary O'Brien | 2 | Daughter | — | California |
| 73 | Catherine O'Brien | 1 | Daughter | — | California |
| 74 | Baby O'Brien | 0 | Son | — | California |
| 75 | Patrick Sullivan | 50 | Head | Laborer | Ireland |
| 76 | Mary Sullivan | 45 | Wife | — | Ireland |
| 77 | John Sullivan | 22 | Son | — | California |
| 78 | James Sullivan | 20 | Son | — | California |
| 79 | Margaret Sullivan | 18 | Daughter | — | California |
| 80 | Thomas Sullivan | 16 | Son | — | California |
| 81 | Alice Sullivan | 14 | Daughter | — | California |
| 82 | Robert Sullivan | 12 | Son | — | California |
| 83 | William Sullivan | 10 | Son | — | California |
| 84 | Richard Sullivan | 8 | Son | — | California |
| 85 | Mary Sullivan | 6 | Daughter | — | California |
| 86 | Catherine Sullivan | 4 | Daughter | — | California |
| 87 | Baby Sullivan | 2 | Son | — | California |
| 88 | Patrick Murphy | 60 | Head | Laborer | Ireland |
| 89 | Mary Murphy | 55 | Wife | — | Ireland |
| 90 | John Murphy | 25 | Son | — | California |
| 91 | James Murphy | 23 | Son | — | California |
| 92 | Margaret Murphy | 21 | Daughter | — | California |
| 93 | Thomas Murphy | 19 | Son | — | California |
| 94 | Alice Murphy | 17 | Daughter | — | California |
| 95 | Robert Murphy | 15 | Son | — | California |
| 96 | William Murphy | 13 | Son | — | California |
| 97 | Richard Murphy THIS PERSON | 11 | Son | — | California |
| 98 | Mary Murphy | 9 | Daughter | — | California |
| 99 | Catherine Murphy | 7 | Daughter | — | California |
| 100 | Baby Murphy | 5 | Son | — | California |
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)