Martin Augustine Knapp (November 6, 1843 – February 10, 1923) was a United States circuit judge of the United States Commerce Court, the United States Court of Appeals for the Second Circuit, the United States Circuit Courts for the Second Circuit and the United States Court of Appeals for the Fourth Circuit.

Martin Augustine Knapp
Fourth Circuit Court of Appeals
Born 1843 in Spafford, NY
Died 1923 in Washington, DC
FJC ID: 1293
Career output and lasting influence
Opinions attributed per year · peak 18/year
Later decisions citing those opinions, per year · peak 25/year
U.S. Circuit Courts for the Second Circuit · 1910–1911Commerce Court · 1910–1913Second Circuit Court of Appeals · 1910–1916Fourth Circuit Court of Appeals · 1916–1923
Both charts share the same year axis. Opinion counts include only opinions in our corpus attributed to this judge so far — a year at zero can mean an attribution gap, not judicial silence. Influence typically outlasts the career: citations keep climbing after the last opinion.
- Gender
- Male
- Race
- White
Prior employment
- Private practice, Syracuse, New York1870–present
- Interstate Commerce CommissionMember · 1897–1910
- ↳chairman · 1898–1910
- Syracuse, New YorkCorporation counsel · 1877–1883
Appointments

1910–1911 · Appointed by William H. Taft (Republican)Term ended: Abolition of Court
1910–1916 · Appointed by William H. Taft (Republican)Term ended: Reassignment
Education
- Read law1869
- Wesleyan UniversityB.A. · 1868