CaseTrail

Justice William J. Brennan Jr.

Voting and opinion record for William J. Brennan Jr. in the Supreme Court Database, covering the 1956 through 1989 Terms.

5,260decisions participated in
79%in the majority
1,099dissenting votes
454majority opinions written

Court eras served in this data: Warren Court, Burger Court, Rehnquist Court.

Majority opinions by issue area

Most often on the same side

JusticeSame sideCases together
Thurgood Marshall92.4%3,482
Earl Warren92.2%1,832
Arthur J. Goldberg90.8%446
Abe Fortas88.8%529
William O. Douglas80.7%2,768

Least often on the same side

JusticeSame sideCases together
William H. Rehnquist51.4%2,933
Antonin Scalia56.1%585
Sandra Day O'Connor58.2%1,398
Anthony M. Kennedy58.8%352
Warren E. Burger58.8%2,718

“Same side” means both Justices were in the majority, or both in dissent, in decisions where both voted; pairs with fewer than 50 shared decisions are left out.

Majority opinions written (454)

Dissents in argued cases (most recent 30 of 1,000)

Search all opinions by Justice Brennan

Source: Supreme Court Database, 2026 Release 01 (data file dated September 8, 2026). Imported into CaseTrail November 5, 2026. Coverage: decisions from the 1946 through 2025 Terms. Methodology · Report an error