The Wizards have won back-to-back games for the first time since Dec. 27-29.
Jamison also grabbed 12 rebounds and both Mike James and Caron Butler scored 19 points. The Wizards will go after their first three-game winning streak of the season when they are at home against San Antonio Saturday.
New Jersey, which has lost five straight, got 26 points and 10 assists from Devin Harris.
The Nets owned a three-point lead early in the third quarter, but the Wizards took control with a 21-7 surge. New Jersey climbed back within five midway through the fourth period, only to see Washington produce a 9-1 run that wrapped up the victory.