James Francis Thaddeus “Jefty” O'Connor (November 10, 1886 – September 28, 1949) was a United States district judge of the United States District Court for the Southern District of California.

James Francis Thaddeus O'Connor
California Southern District Court
Born 1886 in Grand Forks, ND
Died 1949 in Los Angeles, CA
FJC ID: 1795
- Gender
- Male
- Race
- White
Prior employment
U.S. Department of the TreasuryComptroller of the currency · 1933–1938- Private practice, Los Angeles, California1925–1933
- Private practice, Grand Forks, North Dakota1912–1925
Instructor of rhetoric · 1909–1912
Appointments
1940–1949 · Appointed by Franklin D. Roosevelt (Democratic)Term ended: Death
Education
- Yale UniversityM.A. · 1910
LL.B. · 1909- University of North Dakota School of LawLL.B. · 1908
- University of North DakotaA.B. · 1907