Bosh, who had 13 points in the fourth quarter, has scored at least 30 in four of Toronto's past five games.
Joe Johnson had 25 points for the Hawks, who lost back-to-back games for the first time since a four-game slide between Dec. 29 and Jan. 5.
Atlanta's Josh Smith had 20 points in the first half but was held in check after the break, finishing with 24 points and nine rebounds.
It was the first meeting between the teams since Hawks rookie Al Horford knocked Toronto guard T.J. Ford to the floor in a Dec. 11 game in Atlanta. Ford, who was taken off on a stretcher, suffered a stinger and has not played since.
Horford was booed whenever he touched the ball Friday.
There was more bad blood in this one when Atlanta guard Anthony Johnson was ejected after elbowing Toronto's Jose Calderon in the back of the head with 41 seconds left in the first half.
Johnson was assessed a flagrant two foul, which comes with an automatic ejection.
Calderon clutched the back of his head after taking the hit but remained in the game and made both technical free throws.
Calderon finished with 13 points and nine assists.
Marvin Williams had 13 points and nine rebounds for Atlanta.
Toronto led 44-39 at the half but fell behind when Atlanta opened the third with a 13-2 run, with Horford scoring six points and Johnson capping the spurt with a 3-pointer.
The Raptors fought back and tied the game at 56 on Parker's 3-pointer with 4:41 left, then got two more 3s from Parker to take a 67-60 lead after three quarters.
Smith had 16 points in the first but Atlanta trailed 27-22 after 12 minutes.
-- NOTES: Ford was cleared to resume workouts Jan. 9. No timetable has been set for his return. Toronto is 9-8 since Ford's injury. ... The Raptors have won four straight at home, matching a season high.
Toronto Raptors' Jose Calderon, from Spain, reacts after being hit in the head by Atlanta Hawks Anthony Johnson during the Raptors win in Toronto on Friday. Johnson was ejected from the game. / photo: Associated Press
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