1875 Census - New York State - Jun 18
Name: Oscar B. Marsh
Age: 1
DOB: c.1874
POB: Sullivan County, New York
Residence: Cochecton Twp, Sullivan, NY
Household Members: TYLER
Head: John H. (58-c.1817-PA-W)
Dau: Alice Marsh (19-c.1856-PA)
Grandson: Self
Son: Leroy (17-c.1858-PA)
Dau: Alita (14-c.1861-PA)
Dau: Love A. (12-c.1863-PA)

1880 Census - U.S. Federal - Jun 22
Name: Oscar March
Age: 6
DOB: c.1874
POB: New York
Residence: Cochecton, Sullivan, NY
Household Members: TYLER
Head: John A. (63-c.1817-NY-W)
Son: Leroy (22-c 1858-PA)
Dau: Love A. (17-c.1863-PA)
Gson: Charles Conkling (11-c 1869-NY)
Grandson: Self

New York State Marriage Index
Date: 15 Aug 1897
Place: Cochecton, New York
Groom: Oscar B. Marsh
Bride: Lulu P. Tyler

1900 Census - U.S. Federal - Jun 23
Name: Oscar B. Marsh
Age: 26
DOB: Apr 1874
POB: New York
Residence: Delaware Twp, Sullivan, NY
Occupation: Sawmill fireman
Marital Status: Married-3y-c.1897
Children: 1 born/1 living
Household Members: MARSH
Head: Self
Wife: Lulu P. (21-Aug 1878-NY)
Son: Basil W. (1-Jul 1898-NY)

WWI Draft Registration Card
Registration Date: 12 Sep 1918
Name: Oscar Bird Marsh
Age: 45
DOB: 5 Apr 1873
POB: Native Born
Residence: Callicoon, Sullivan, NY
Occupation: Erie RR trackman
Mother: Mrs. Alice Dexheimer

1920 Census - U.S. Federal - Jan 15
Name: Oscar Marsh
Age: 45
DOB: c.1875
POB: New York
Residence: Delaware Twp, Sullivan, NY
Occupation: RR trackman
Marital Status: Widowed
Household Members: MARSH
Head: Self
Mom: Alice Dexheimer (64-c.1856-PA)

New York, County Marriage Index
Date: 24 Nov 1920
Place: Sullivan, New York
Groom: Basil W. Marsh
Age: 22 - c.1898
Father: O. B. Marsh
Mother: Lulu Tyler
Bride: Sarah A. Bush
Age: 18 - c.1902
Father: Sidney Bush
Mother: Nancy Parson

1930 Census - U.S. Federal - Apr 7
Name: Oscar Marsh
Age: 55
DOB: c.1875
POB: New York
Residence: Guilford, Chenango, NY
Occupation: House mover laborer
Marital Status: Divorced
Household Members: DEXHEIMER
Head: Alice (74-c 1856-PA-W)
Son: Self

1940 Census - U.S. Federal - May 13
Name: Oscar Marsh
Age: 67
DOB: c.1873
POB: New York
Residence: Cochecton, Sullivan, NY
Residence 1935: Same Place
Occupation: Retired
Marital Status: Single
Relation to HOH: Self

New York State Death Index
Name: Oscar Marsh
Age: 71
DOD: 19 Oct 1945
POD: Monticello, New York

Resource: ancestry.com