The U.S. won the tournament without conceding a goal.
"It's another title and that's what were all about," U.S.
attacking midfielder Megan Rapinoe told reporters. "All tournament we took it up another notch.
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"I feel like we still have more work to do, but we kept a clean sheet (for the tournament). Our defence was really solid."
Both the U.S. and Canada qualified for the 2019 World Cup in France by reaching the final.
Lavelle opened the scoring in just the second minute when she received a pass from Lindsey Horan and drove home a left-footed shot.
Canada's Kadeisha Buchanan narrowly pushed a header wide in the 24th minute before Morgan secured the victory in the 89th minute with her seventh goal of the tournament to win the Golden Boot.
"I'm really happy with the performances," Morgan said.
"We had so many players who had an amazing tournament. We still want to continue to build."
(Writing by Jahmal Corner in Los Angeles; Editing by Greg Stutchbury)
