The 1860 United States census showed Joseph Vassair (age 5, born in Maine) living with his parents Isaiah (age 29, born in Maine, farmer) and Felenoise (age 27, born in Maine) and living in Van Buren Plantation, Aroostook County, Maine. His other siblings were Jude (age 18, born in Maine), Delinan (age 9, born in Maine), Solomon (age 4, born in Maine), Tarsie (age 3, born in Maine), Paptiste (age 2, born in Maine), and John (age 1, born in Maine).
The 1870 United States census showed Joseph Vasser (age 16, born in Maine) living with his parents Isaac (age 40, born in Maine, day laborer) and Flora (age 35, born in Maine) in Fort Fairfield, Aroostook County, Maine. His other siblings were Solomon (age 13, born in Maine), Nancy (age 11, born in Maine), Battia (age 8, born in Maine), Olive (age 6, born in Maine), Harriet (age 3, born in Maine), and Thomas (age 9 months, born in Maine).
Joseph Vassar married Marguerite Maggie Violette on February 9, 1872, in Van Buren, Maine.
The 1875 Minnesota census showed Joseph Vasser (age 21, born in Maine) married to Margaret (age 17, born in Maine) and living in Dayton, Hennepin County, Minnesota. Children Jos. (age 2, born in Maine) and Mary (age 1, born in Maine) also lived with the couple.
The 1880 Minnesota census showed Joseph Vassar (age 26, born in Maine, butcher) married to Maggie (age 24, born in Maine) and living in Dayton, Hennepin County, Minnesota. Children Joseph Jr. (age 7, born in Maine), Mary (age 6, born in Maine), Elizabeth (age 4, born in Minnesota), Prosper (age 3, born in Minnesota), and Georgiana (age 8 months, born in Minnesota) also lived with the couple.
The 1885 Minnesota census showed Joseph Vasscar (age 30, born in Maine) married to Maggie (age 28, born in Maine) and living in Otsego Township, Wright County, Minnesota. Children Joseph (age 12, born in Maine), Mary (age 11, born in Maine), Elizabeth (age 9, born in Minnesota), Prosper (age 8, born in Minnesota), Rosia (age 4, born in Minnesota), and Flora (age 2, born in Minnesota) also lived with the couple.
The 1895 Minnesota census showed Joseph Vasser (age 40, born in Maine, farmer and brick maker) married to Maggie (age 38, born in Maine) and living in Otsego Township, Wright County, Minnesota. Children Joseph Jr. (age 22, born in Maine, farmer), Prosper (age 17, born in Minnesota), Rose (age 14, born in Minnesota), Flora (age 11, born in Minnesota), Fred (age 9, born in Minnesota), Ale (age 7, born in Minnesota), Tallie (age 4, born in Minnesota), and Frank (age 3, born in Minnesota) also lived with the couple.
Joseph Vassar married Eugenie Plante on September 27, 1898, in St. John the Baptist Church, Dayton, Minnesota.
The 1900 United States census showed Joseph Vassar (age 45, born in March 1855 in Maine, brick maker) married to Jane (age 32, born in January 1868 in Minnesota) and living in Otsego Township, Wright County, Minnesota. Children Fred (age 14, born in March 1886 in Minnesota), Allie (age 12, born in September 1887 in Minnesota), Stella (age 11, born in May 1888 in Minnesota), and Frank (age 9, born in May 1891 in Minnesota) also lived with the couple.
The 1905 Minnesota census showed Joseph Vasser Sr. (age 50, born in Maine, brick maker) married to Jane (age 37, born in Minnesota) and living in Otsego Township, Wright County, Minnesota. Children Stella (age 16, born in Minnesota), and Frank (age 15, born in Minnesota), Frederick (age 4, born in Minnesota), and Theophilos (age 2, born in Minnesota) also lived with the couple.
The 1910 United States census showed Joseph Vassar (age 55, born in Maine, farmer) living in Township 144, Dunn County, North Dakota. Children Frank (age 21, born in Minnesota), Frederick (age 9, born in Minnesota), Theofolis (age 7, born in Minnesota), and Archibald (age 5, born in Minnesota) also lived with the Joseph.
Joseph Vassar died March 26, 1924, in Bonnyville, Alberta, Canada.