DAVID MONTGOMERY, the tenth child and seventh son of William and Mary Johnston Montgomery, was born on August 1, 1800, in Washington County, Pennsylvania. He moved to Indiana with his parents in 1806. David was married to Elizabeth Troutman, born in Kentucky on April 6, 1801, in Clark County on January 24, 1826. She is the daughter of Leonard Troutman and Mary Ann Sagaser. Interestingly, Leonard Troutman was living in Nelson County Kentucky, very near Thomas Montgomery, the brother of William Montgomery, at the time of the 1820 census.

David and Elizabeth were living in Washington Township at the time of the 1850 census, probably on the farm that he was bequeathed in his father's will, that is, on the north side of Section 28's Northwest Quarter, about two miles northeast of the village of New Washington. (David's brother, Samuel Montgomery, received the south side of this quarter in the same will.) From the dating of land transfers, it appears that David and Elizabeth moved their family to Pike County, Illinois about 1865, shortly after the conclusion of the Civil War, where he settled on a farm near Chambersburg, Illinois.

The 1870 census for Fairmount Township, Pike County, shows David and Elizabeth living with daughter Julia and son, Martin, and a Kentucky born farmer, William S. Taylor, who was Julia's first husband. David was listed as the owner of land valued at $2,500 and personal property valued at $600. David died on June 5, 1880 at the farm near Chambersburg. He was buried in Brown Cemetery, Chambersburg, Pike County, Illinois. His widow, Elizabeth, is shown in the 1880 census for Chambersburg Township, living with daughter Julia and her second husband, Joseph Patton. The family also includes granddaughter, Elizabeth Taylor and grandson, William Taylor. Joseph Patton, married daughter Julia in 1878 after her first husband, William S. Taylor, had died of measles in 1875. Widow Elizabeth Troutman Montgomery died on May 29, 1889, and her burial place, like her husband's, is Brown Cemetery, Chambersburg, Pike County, Illinois.

David Montgomery is not listed in the 1880 census, having died just days before it was taken. He is, however, listed in the 1880 Mortality Index for Pike County Illinois. It states that his father, William Montgomery, was born in Maryland, and his mother, Mary Johnston, was born in Ireland. David and his brother James were the only children or William Montgomery and Mary Johnston to live to 1880. The census records for both children agree on the birthplace of their parents.

David Montgomery and Elizabeth Troutman had the following children:

William Harrison b. 1827 IN married Melissa Ann Duffy

Mary Ann b. 1829 IN married first Miller Ray second Thomas J. Ray

John Ray b. 1830 IN married Elizabeth Herring

Martha Jane b. 1832 IN married George Alexander Buchanan

Elizabeth b. 1835 IN never married

Margaret Frances b. 1837 IN married Thomas Jefferson Smith

David H. b. 1839 IN married Sarah Ann Butler

George W. b. 1841 IN never married

Thomas Leonard b. 1843 IN married first Savannah Ellen Butler second Alice May Washer

Nancy Isabelle b. 1845 IN married Isom H. Blankenship

Joseph C. b. 1846 IN married Julia E. Allen

Julia A. b. 1848 IN married first William S. Taylor second Joseph C. Patton

Martin J. b. 1852 IN never married