The 1977–78 NBA season was the 32nd season of the National Basketball Association. The season ended with the Washington Bullets winning the NBA Championship, beating the Seattle SuperSonics 4 games to 3 in the NBA Finals.
* The New York Nets moved from Uniondale, New York to Piscataway, New Jersey, and were renamed the New Jersey Nets. The New York Knicks, who forced the Nets to pay $4.8 million for invading the New York area prior to the previous season, remained the only NBA team in New York City for 35 years, until the Nets moved to Brooklyn in the 2012–13 season.
* The 1978 NBA All-Star Game was played at the Omni Coliseum in Atlanta, with the East beating the West 133-125. Randy Smith of the Buffalo Braves won the game's MVP award.
* The defending champion Portland Trail Blazers started with a 50–10 record and looked poised to repeat, but Bill Walton broke his foot and was sidelined for the remainder of the season. The Blazers, hurt by Walton's absence and by other key injuries, faded to an 8–14 finish and lost to the Sonics in the Western Conference semifinals.
* On December 9, 1977, Kermit Washington punched Houston Rockets player Rudy Tomjanovich in the face during an NBA game. Tomjanovich sustained serious injuries and missed the rest of the season. The NBA fined Washington $10,000 and suspended him for 26 games.
* Throughout the 1977–78 season, CBS broadcast NBA games during the regular season and the playoffs. During halftime of those games, they showed a pre-taped H–O–R–S–E tournament pitting players from the NBA against each other. It featured, among others, Pete Maravich, Paul Westphal, Bob McAdoo, Kevin Grevey, and George Gervin. Maravich and Westphal made it to the final, and CBS originally planned to hold their match at halftime during an NBA Finals game. However, Maravich was injured and could not participate, so CBS decided to have Westphal compete against "Bag-Man" (who was actually analyst Rick Barry with a bag covering his head) by letting them both shoot a free throw. Westphal, blindfolded, went first and hit his. Barry missed, and Westphal was awarded the trophy. H–O–R–S–E featuring NBA players would not be re-instituted for 31 more years (until the 2009 All-Star Weekend).