Background
Isaac Welsh was born July 20, 1811 in Belmont County, Ohio.
Isaac Welsh was born July 20, 1811 in Belmont County, Ohio.
He was raised on a farm, and had little formal education. As an adult, he moved to Beallsville in Monroe County, and was in merchandising, but soon returned to Belmont. He was a Whig until that party collapsed.
In 1857, and 1859, he was elected to the Ohio House of Representatives for the 53rd and 54th General Assembly as a Republican.
In 1861, he was elected from the 20th District to the Ohio Senate in the 55th General Assembly. Presidential elector for Grant/Colfax in 1868
Welsh was elected State Treasurer in 1871, and again in 1873.
Welsh was married to Mary A. Armstrong of Belmont County. Welsh died at his home at Washington Township, Belmont County, Ohio.