Thomas Madison Coon is the son of George Kelly Coon and Catharine Morgan.

He is 1 of 8 known children of George and Catharine Coon. His siblings are:
• Nancy Jane Coon (1840-1863)
• Abraham Lincoln Coon (1842–1926)
• Mary Elizabeth Coon Herbert (1845–1930)
• George Washington Coon (1850–1936)
• Martin Bear Coon (1852–1933)
• July Ann Coon (1855-Abt 1863)
• Lydia Catherine Coon Davis (1858–1928)
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Thomas was married to:
• Sarah E. Jones - 8 Oct 1871 (Died 1876)
• Evaline Ophelia "Eva" Gibbs - 28 Sep 1881
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Per the 1880 US Census, Thomas Coon resided in Halsey Precinct, Linn County, Oregon with his parents. Listed are:
-George K Coon, age 75, born Virginia
-Catherine Coon, age 80, born Kentucky
-Thomas M Coon, age 33, born Illinois, Son, WIdowed
-George W Coon, age 29, born Missouri, Son
-Elsie Coon, age 7, born Oregon, Granddaughter
-Fanni Coon, age 5, born Oregon, Granddaughter
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Per the 1910 US Census, Audra Vivian Coon resided in Bellfountain Precinct, Benton County, Oregon with her parents. Listed are:
-Thomas M Coon, age 63, born Missouri
-Evaline Coon, age 43, born Oregon
-Emma L Coon, age 21, born Oregon
-Maud K Coon, age 19, born Oregon
-Marven T Coon, age 17, born Oregon
-Pearl T Coon, age 14, born Oregon
-Vivian A Coon, age 9, born Oregon

In 1910, Thomas and Eveline Coon are listed as married 25 years. Eveline is listed as having 7 children born and 7 children living.
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Thomas Coon is known to have 9 children.
By Sarah E. Jones:
• Elsie Coon Pierce (1872–1969)
• Fannie E. Coon Richardson Eeles (1874–1956)

By Evaline Ophelia Gibbs:
• Bertha Jeanette Coon Darnielle (1885-1969 )
• Dora Coon Whitlow Thompson (1886–1974)
• Emma Lucille Coon Hinton (1888–1983)
• Maude K Coon Lamb (1891–1969)
• Marven T Coon (1893–1982)
• Pearl Tressa Coon Elder Poundstone (1895–1990)
• Audra Vivian Coon (1900–1912)
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OBITUARY
Corvallis Gazette-Times, Corvallis, Oregon, Monday, 4 Mar 1929, Page 6

Thomas Madison Coon, pioneer of Benton county, died at S o'clock this morning at the family home at Bellfountain. He had been failing for several months.

The funeral will be at 2 o'clock Tuesday afternoon from the church at Bellfountain, with Rev. Clarence W. Reynolds of Corvallis officiating. Interment will be in the Bellfountain cemetery.

Mr. Coon was a son of George Kelley and Catherine Morgan Coon and was born in Mercer county, Ill., January 20, 1846. He crossed the plains with his parents by ox team, coming over the old Barlow trail. The family arrived in Oregon in 1863, locating first in Linn county, near Shedd, and later resided on the old Washington L. Coon place near Oakville.

He was married to Miss Sarah E. Jones in 1871, and two daughters were born to the couple. They are Mrs. Elsie Pierce, Albany, and Mrs. Fannie Eels, Astoria. Mrs. Coon died in 1876.

In September, 1884, Mr. Coon married Miss Eva Gibbs, in Benton county. There were seven children by this marriage, Mrs. Bertha Darnielle, The Dalles; Mrs. Dora. Thompson, Portland; Mrs. Emma Hinton and Mrs. Maud Lamb, Bellfountain; Marvin Coon, Beaver Creek, Mrs. Pearle Poundstone, Portland. Miss Vivian Coon died in 1912. There are 22 grandchildren and four great grandchildren.

Mr. Coon was one of eight children. His father died at the age of 91 years and his mother at 84. Surviving brothers and sisters are Martin Coon, Couer de Alene, Idaho; George Coon, Corvallis, and Mrs. Mary Herbert, Eugene.

During last summer Mr. Coon made a trip over the Mt. Hood loop arid followed the old Barlow trail over which he had traveled as a boy, locating the old toll gate and recalling the incidents of pioneer days when the wagon train passed through it. Mr. Coon had been a member of the Christian church for many years and was active in that denomination. He was widely known throughout Benton county. The remains are at the Holhngsworth funeral home in this city.