Hamill attended the common schools in Westernport, Maryland, and engaged in the real estate business and mercantile pursuits, and was collector of taxes in 1841 and 1842. He served as a member of the Maryland House of Delegates in 1843 and 1844, and was a judge of the orphans’ court of Allegany County, Maryland, from 1854 until 1869, and elected chief judge in 1867. He was elected as a Democrat to the Forty-first Congress, serving from March 4, 1869 until March 3, 1871, but was not a candidate for renomination in 1870. He later engaged in the real estate business until his death in Oakland, Maryland, and is interred in Odd Fellows Cemetery.
- United States Congress. "Patrick Hamill (id: H000100)". Biographical Directory of the United States Congress.
|U.S. House of Representatives|
| Representative of the Fourth Congressional District of Maryland