Son of Benjamin C. Collier and his 2nd wife, Mary ? Barr Granbury. He resided between 1839 and 1852 in Early County, GA. He resided after February 1853 in Tyler County, TX. He resided between 1859 and 1880 in Hardin County, TX. He was a Farmer between 1860 and 1880 in Hardin County, TX. He served in the military between January 1862 and
May 1865 in Confederate Soldier, 11th Battalion, Texas Volunteer Calvary & Infantry (Spaight's), Co. D.. He was between 1869 and 1877 in Tyler County, TX. He died on August 2, 1926 in Silsbee, Hardin County, TX.
He was buried in Hooks - Cravey Cemetery, Hardin County, TX. He was educated and could read and write. He was a Sheriff in Kountze, Hardin County, TX.

Henry married Nancy Mary Lyons on 10-25-1862 (daughter of Unknown Given Names LYONS and UNKNOWN WIFE). Nancy Mary LYONS was born about 1841 in Mississippi. She resided between 1870 and 1880 in Hardin County, TX. She was keeping house between 1870 and 1880 in Hardin County, TX. She was buried in Hooks - Cravey Cemetery, Hardin County, TX.

Both Nancy and Henry Mitchell Collier are said to be buried in unmarked graves in Hooks - Cravey Cemetery, Hardin County, TX. They had 10 children: Sarah Jane (Sally) COLLIER (born on October 23, 1863); Araminta W. COLLIER (born in December 1867); Mary Pauline COLLIER (born on August 2, 1868); Lucy COLLIER (born May 11, 1870) in Hardin County,
TX. Lucy resided after May 11, 1870 in Hardin County, TX.; William Henry (Willie) COLLIER (born on November 22, 1871); Cora Lou COLLIER (born on August 26, 1873); Fannie Abigail Cornelia COLLIER (born on February 10,
1874); Ada COLLIER (born on June 22, 1876) in Hardin County, TX and Walter COLLIER (born about 1882) in Hardin County, TX. Walter resided in 1903 in Silsbee, Hardin County, TX. He died on April 27, 1903 in Kountze, Hardin County, TX. He was buried in Hooks Cemetery, Hardin County, TX.