| William Lochren | |
| Office: | Judge of the United States District Court for the District of Minnesota |
| Term Start: | May 18, 1896 |
| Term End: | July 11, 1908 |
| Appointer: | Grover Cleveland |
| Predecessor: | Rensselaer Nelson |
| Successor: | Milton D. Purdy |
| Office2: | Member of the Minnesota Senate |
| Term2: | 1869-1870 |
| Birth Name: | William Lochren |
| Birth Date: | 3 April 1832 |
| Birth Place: | County Tyrone, Ireland |
| Death Place: | Minneapolis, Minnesota |
| Education: | read law |
William Lochren (April 3, 1832 – January 27, 1912) was a United States district judge of the United States District Court for the District of Minnesota.
Born in County Tyrone, Ireland (now Northern Ireland), Lochren read law to enter the bar in 1856. He entered private practice in St. Anthony, Minnesota Territory (State of Minnesota from May 11, 1858) from 1856 to 1861. He served as an alderman and later as city attorney of St. Anthony. He was in the United States Army as a Lieutenant from 1861 to 1863, during the American Civil War. He resumed private practice in Minneapolis, Minnesota from 1864 to 1881. He was a member of the Minnesota Senate from 1869 to 1870. He was city attorney of Minneapolis from 1877 to 1878. He was a Judge of the Minnesota District Court for the Fourth Judicial District of Minnesota from 1881 to 1893. He was Commissioner of Pensions for the Bureau of Pensions in the United States Department of the Interior from 1893 to 1896.
Lochren was nominated by President Grover Cleveland on May 15, 1896, to a seat on the United States District Court for the District of Minnesota vacated by Judge Rensselaer Nelson. He was confirmed by the United States Senate on May 18, 1896, and received his commission the same day. Lochren served in that capacity until his retirement on July 11, 1908.
Lochren died on January 27, 1912, in Minneapolis.