|Dates:||March 30–April 13|
|Eastern Finals:||Celtics defeated Nationals, 3–0|
|Western Finals:||Hawks defeated Lakers, 3–0|
The 1957 NBA World Championship Series was the championship series of the 1956–57 National Basketball Association season, and was the conclusion of the 1957 NBA Playoffs.
The best-of-seven series was played between the Western Division champion St. Louis Hawks and the Eastern Division champion Boston Celtics. This was the first trip to the Finals for each team, the first Finals in which both teams competing were making their first appearances since 1951. Red Auerbach became the first head coach to have taken two separate teams to the NBA Finals, having done so with Washington in 1949. The Celtics won the series over the Hawks, 4–3. It remains the only Game 7 in NBA history to be decided in double-overtime.
1957 NBA Playoffs
|St. Louis Hawks (Western Division Champion)||Boston Celtics (Eastern Division Champion)|
1st Western (tied), 4th Overall
|Regular season||44–28 (.611)
1st Eastern, 1st Overall
|Earned first-round bye||Division Semifinals||Earned first-round bye|
|Defeated the (2) Minneapolis Lakers, 3–0||Division Finals||Defeated the (2) Syracuse Nationals, 3–0|