Thomas Day Thacher (September 10, 1881 – November 12, 1950) was a United States district judge of the United States District Court for the Southern District of New York, the 21st Solicitor General of the United States and a Judge of the New York Court of Appeals.

Thomas Day Thacher
New York Southern District Court
Born 1881 in Tenafly, NJ
Died 1950 in New York, NY
FJC ID: 2358
- Gender
- Male
- Race
- White
Prior employment
- New York State Court of AppealsJudge · 1943–1948
- Private practice, New York City1906–1907, 1910–1917, 1918–1925, 1933–1943
- New York CityCorporation counsel · 1943
Solicitor general of the United States1930–1933- American Red Cross Commission to RussiaMajor · 1917–1918
Assistant U.S. attorney · 1907–1910
Appointments
1925–1930 · Appointed by Calvin Coolidge (Republican)Term ended: Resignation
Education

- Yale University
- Yale Universityba
- Yale Universityjd
- Read law1906
- Yale UniversityB.A. · 1904