1900 U.S. Census, Washington, D.C.
Supervisor’s District 1, Enumeration District 130, Sheet 2
201 N Street
Dwelling 40, Family 40
Sandford, Oscar, head, white, male, born February 1861, age 39, married, married at age 17, born in Virginia, both parents born in Virginia, truck gardner, can read and write, speaks English, rents house
Sandford, Lucy, wife, white, female, born February 1864, age 36, married, married at age 17, mother of 6 children of whom 5 survive, born in Virginia, both parents born in Virginia, can read and write, speaks English
Sandford, Clarance, son, white, male, born February 1885, age 15, single, born in Virginia, both parents born in Virginia, at school for nine months of the year, can read and write, speaks English
Sandford, Howard, son, white, male, born July 1888, age 11, single, born in Virginia, both parents born in Virginia, at school for nine months of the year, can read and write, speaks English
Sandford, Nellie, daughter, white, female, born September 1890, age 9, single, born in Virginia, both parents born in Virginia, at school for nine months of the year, cannot read or write, speaks English
Sandford, Elizabeth, daughter, white, female, born June 1891, age 8, single, born in Virginia, both parents born in Virginia, at school for nine months of the year, cannot read or write, speaks English
Sandford, Josephine, daughter, white, female, born August 1899, age 9/12, single, born in Virginia, both parents born in Virginia

1910 U.S. Census, Washington, D.C.
Enumeration District 79, Sheet 13
110 “You” [U] Street
Dwelling 63, Family 67
Sanford, Oscar D., head, male, white, 50, married once, married for 27 years, born in Virginia, both parents born in Virginia, speaks English, merchant in wood yard, employer, can read and write
Sanford, Lucy A., wife, female, white, 46, married once, married for 27 years, mother of 7 children of whom 6 survive, born in Virginia, both parents born in Virginia, speaks English, no occupation
Sanford, Clarence W., son, male, white, 25, single, born in Virginia, both parents born in Virginia, speaks English, mason at stove yard, wage worker, not out of work on April 15, not out of work in 1909, can read and write
Sanford, Howard F., son, male, white, 22, born in Virginia, both parents born in Virginia, speaks English, mason at stove yard, wage worker, not out of work April 15, 12 months out of work in 1909, can read and write
Sanford, Nellie A., daughter, female, white, 20, single, born in Virginia, both parents born in Virginia, speaks English, no occupation, can read and write
Sanford, Elizabeth F., daughter, female, white, 17, single, born in Virginia, both parents born in Virginia, speaks English, no occupation, can read and write
Sanford, Josephine, daughter, female, white, 10, single, born in Virginia, both parents born in Virginia, speaks English, no occupation, can read and write, in school
Sanford, Lillian G., daughter, female, white, 6, single, born in the District of Columbia, both parents born in Virginia, speaks English, no occupation

On 12 September 1918, Clarence Warren Sanford registered for the the draft, giving his name as Clarence Warren Sanford, living at 156 Q Street, N.W., Washington, D.C., age 33, born 12 February 1885, white, native born, occupation wood dealer, self employed, place of business 156 Q Street, S.W., nearest relative Lucy Sanford of 156 Q Street, S.W., medium height, medium build, blue eyes, brown hair. [Registration Card serial number 3085, order number 3236.]

1920 U.S. Census, Washington, D.C.
Enumeration District 93, Precinct 4, Sheet 9A
Enumerated 7 January 1920
156 Q Street, S.W.
Dwelling 199, Household 206
Sanford, Oscar, head, rents, male, white, age 62, married, can read and write, born in Virginia, both parents born in Virginia, speaks English, occupation wood yard, works on own account
Sanford, Lucy, wife, female, white, age 56, married, can read and write, born in Virginia, both parents born in Virginia, speaks English, no occupation
Sanford, Clarence, son, male, white, age 34, single, not in school, can read and write, born in Virginia, both parents born in Virginia, speaks English, occupation laborer in wood yard, wage worker
Sanford, Josephine, daughter, female, white, age 20, single, not in school, can read and write, born in Virginia, both parents born in Virginia, speaks English, occupation clerk in gov’t service, wage worker

1930 U.S. Census, Prince George’s County, Maryland:
Berwyn Election District No. 21
College Park Town
Enumerated 9 April 1930
Enumeration District 17-56, Supervisor’s District 5
Sheet 5A
505 Vassar Avenue
Dwelling 114, Household 116
Sanford, Oscar D., head, rents, $15 real value, no radio set, not on farm, male, white, age 71, married at age 25, not in school, can read and write, born in Virginia, both parents born in Virginia, no occupation
Sanford, Lucy A., wife, female, white, age 66, married at age 19, not in school, can read and write, born in Virginia, both parents born in Virginia, no occupation
Sanford, Clarence W., son, male, white, age 45, single, not in school, can read and write, born in Virginia, both parents born in Virginia, occupation carpenter in building construction, wage worker, at work previous day, not a veteran