[A Genealogy and Biographical History of Allegheny County Pennsylvania (Part II) p. 587
Isaac McMichael, farmer, postoffice Walker's Mills, was born in this county in 1836. Isaac the pioneer of this family, and a farmer by occupation, came to Allegheny county from east of the mountains at an early date, and purchased a large tract of land in Robinson township. He married Mary Holtz, who bore him twelve children. His son JohnMcMichael, was born and reared on the property mentioned and was always a farmer. He married Ann McMillen, and by her had five children, three of whom are now living. John McMillian died in 1853, aged fifty-seven; his wife in 1845, aged thirty years. Their son Isaac, the subject of this sketch, was born and raided on the farm which he now owns. He was educated at the common schools, and being left an orphan when quite young, and thrown among strangers, he early in life began to battle for himself. In 1854 he went to California, where he was engaged in mining for nine years, but returned to Allegheny county via Key West and New York. He inherited fifty-four acres of his father's land, and also purchased forty-six acres. Mr. McMichael married, in 1876, Ella, daughter of John McCoy, of this county, and to them were born four children, three now living: George Clarence, Stella and Ralph Cleveland. Mr. McMichael is a democrat.