Norwood Penrose Hallowell

Norwood Penrose Hallowell
Hallowell as a captain in the Union Army, 1862
Born(1839-04-13)April 13, 1839
Philadelphia, Pennsylvania, US
DiedApril 11, 1914(1914-04-11) (aged 74)
Medford, Massachusetts, US
Place of burial
AllegianceUnited States United States
Years of service1861 – 1863
Rank Colonel
Unit20th Massachusetts Volunteer Infantry
54th Massachusetts Volunteer Infantry
Commands55th Massachusetts Volunteer Infantry
Battles / warsAmerican Civil War
- Battle of Ball's Bluff
- Battle of Glendale
- Battle of Antietam
- Second Battle of Charleston Harbor

Norwood Penrose "Pen" Hallowell (April 13, 1839 – April 11, 1914) was an officer in the Union Army during the American Civil War. One of three brothers to serve with distinction during the war, he and his brother Edward Needles Hallowell both became commanders of the first all-black regiments. He is also remembered for his close friendship with and influence upon future Supreme Court justice Oliver Wendell Holmes Jr., who was his classmate at Harvard and his comrade during the war.