1969–70 St. Louis Blues season

The 1969–70 St. Louis Blues season involved finishing in first place in the West Division for the second consecutive season. The Blues were the only team in the West Division with a winning record, as they finished 22 points ahead of the second-placed Pittsburgh Penguins. The Blues matched their previous season's total of 37 wins, but finished with 86 points, two points shy of the previous season's points total. NHL legend Camille Henry played his final game with the St. Louis Blues. Henry got 3 points in 4 games.

From a goaltending standpoint, the franchise experienced many changes. Glenn Hall had retired at the end of the 1968–69 season but returned. Despite an appearance in the All-Star Game, Jacques Plante played his final season in St. Louis. He was sold by the Blues to the Toronto Maple Leafs for cash on May 18, 1970. Ernie Wakely was acquired from the defending Stanley Cup champion Montreal Canadiens and became the Blues starting goaltender for the following season.

In the playoffs, St. Louis defeated the Minnesota North Stars 4–2 and the Pittsburgh Penguins 4–2 to advance to their third consecutive Stanley Cup final, where they were swept by the Boston Bruins. Phil Goyette became the first Lady Byng Trophy winner in franchise history as he led the team with 78 points.

Tommi Salmelainen was the first European drafted by an NHL franchise.

As he did with the Chicago Black Hawks in 1966, Glenn Hall retired from St. Louis at the end of the 1968–69 season. He was talked into returning, usually with a promise of more money, but he didn't profess to enjoy his livelihood. Although Hall stayed in St. Louis, he still got nauseous before each game as he did earlier in his career.