The 1900 United States census showed William Foley (age 24, born in February 1876 in Vermont) living with his parents Eugene and Mary in Putney, Vermont.
The 1905 Minnesota census showed William P. Foley (age 28, born in Vermont, day laborer) living in Princeton, Minnesota.
W. P. Foley, of the Bemidji Brick company, left on this morning’s train for Minneapolis and St. Paul on a few days’ business trip. (The Bemidji Daily Pioneer, Tuesday Evening, January 26, 1909, Volume 6, Number 239, Page 3)
The 1910 United States census showed William P. Foley (age 32, born in Vermont, brickyard foreman) living in Bemidji, Minnesota.
W. P. Foley and William Hyatt on Friday purchased the livery business conducted by Kenneth McIver and took possession this morning. The new firm will be known as Foley and Hyatt and will conduct a livery and sales stable having forty-five carriages and sleighs and two Hupp automobiles. Mr. Foley has been connected with the McIver stables for the past two years and enjoys a large acquaintance in this city. His knowledge of the business gives assurance to the public of dependable service. (The Bemidji Daily Pioneer, Saturday Evening, August 24, 1912, Volume 10, Number 101, Page 1)
The 1920 United States census showed William Foley (age 42, born in Vermont, proprietor) married to Margaret (age 35, born in Kansas) and living in Elk River, Minnesota. A son, Harold Thomas (age 8 months, born in Minnesota), also lived with the couple.
The 1930 United States census showed William P. Foley (age 53, born in Vermont, brick factory proprietor) married to Margaret E. (age 45, born in Kansas) and living in Bemidji, Minnesota. Children Harold T. (age 10, born in Minnesota) and Kendall E. (age 9, born in Minnesota) also lived with the couple.