Howe (father-in-law of James W. Brown and George Wilkins Guthrie) was born in Williamstown, Vermont.
 He moved with his parents to Bloomfield, Ohio in 1817.
 He attended private schools and graduated from Warren Academy in Warren, Ohio.
 He moved to Pittsburgh, Pennsylvania in 1829, where he served as a clerk in a wholesale dry-goods establishment before commencing business for himself in 1833.
He married Mary Ann Palmer Howe on December 13, 1833.
From 1839 to 1859, Howe served as a cashier and president of the Exchange National Bank of Pittsburgh.
 He also engaged in copper mining, copper and steel manufacturing, commercial pursuits, and banking.

Howe was elected as a Whig to the Thirty-second and Thirty-third Congresses.
 He was not a candidate for renomination in 1854.
 He resumed his former business pursuits, and was a delegate to the 1860 Republican National Convention that nominated Abraham Lincoln as the candidate for president.
He was assistant adjutant general on the staff of Governor Andrew Gregg Curtin and chairman of the Allegheny County committee for recruiting Union soldiers during the American Civil War.
 He was one of the organizers and first president of the Pittsburgh chamber of commerce.
 He died in Pittsburgh in 1877 and was interred in Allegheny Cemetery.
Howe (father-in-law of James W. Brown and George Wilkins Guthrie) was born in Williamstown, Vermont.  He moved with his parents to Bloomfield, Ohio in 1817.  He attended private schools and graduated from Warren Academy in Warren, Ohio.  He moved to Pittsburgh, Pennsylvania in 1829, where he served as a clerk in a wholesale dry-goods establishment before commencing business for himself in 1833. He married Mary Ann Palmer Howe on December 13, 1833. From 1839 to 1859, Howe served as a cashier and president of the Exchange National Bank of Pittsburgh.  He also engaged in copper mining, copper and steel manufacturing, commercial pursuits, and banking.
Howe was elected as a Whig to the Thirty-second and Thirty-third Congresses.  He was not a candidate for renomination in 1854.  He resumed his former business pursuits, and was a delegate to the 1860 Republican National Convention that nominated Abraham Lincoln as the candidate for president. He was assistant adjutant general on the staff of Governor Andrew Gregg Curtin and chairman of the Allegheny County committee for recruiting Union soldiers during the American Civil War.  He was one of the organizers and first president of the Pittsburgh chamber of commerce.  He died in Pittsburgh in 1877 and was interred in Allegheny Cemetery.
Thomas Marshall Howe