Boies Penrose, American lawyer and politician (b. 1860)
Boies Penrose (November 1, 1860 – December 31, 1921) was an American lawyer and Republican politician from Philadelphia, Pennsylvania.

After serving in both houses of the Pennsylvania legislature, he represented Pennsylvania in the United States Senate from 1897 until his death in 1921. Penrose was the fourth political boss of the Pennsylvania Republican political machine (known under his bossism as the Penrose machine), following Simon Cameron, Donald Cameron, and Matthew Quay.: 53  Penrose was the longest-serving Pennsylvania U.S. senator until Arlen Specter surpassed his record in 2005.