Henry Schell Hagert (US pronunciation: /heɪɡərt/; May 2, 1826 – December 18, 1885) was a United States lawyer, writer, and poet.
Hagert was born in Philadelphia, Pennsylvania, where he was graduated at Central High School in 1842. He was admitted to the bar, May 8, 1847, and soon became solicitor for the board of guardians of the poor. After the consolidation of the city in 1854, he was appointed assistant city solicitor, as which he drafted many important city ordinances. He served as assistant district attorney in 1856–1857, 1868–1871, and 1875–1878, and as district attorney in 1878–1881. He was especially distinguished as a nisi prius lawyer.
In early life he contributed prose and poetry to periodicals. After his death, a volume of his poems, with a memoir by Charles Augustus Lagen, was printed privately (see below).
He died in Philadelphia, where he was interred in Laurel Hill Cemetery.
- Henry S. Hagert, Henry S. Hagert Memorial: Poems and Verses, with sketch of his life (Philadelphia: J.B. Lippincott Company, 1886).