AP Photo/David Zalubowski
In the survey of Republican presidential primary voters, Carson grabbed 29% while Trump got 23%.
The results followed last week's CBS News/New York Times poll that found Carson ahead, which broke Trump's months-long winning streak in national surveys.
The Times reported that Carson's position in the NBC/WSJ poll on Monday "is the highest any Republican candidate has reached in that survey."
However, pollster Fred Yang, whose firm conducted the poll, struck a cautious note. Yang said that Carson "has broad support, but we don't know yet the depth and commitment of that support."
Sen. Marco Rubio (R-Florida) got third place in the poll, with 11%, followed by Sen. Ted Cruz (R-Texas), with 10%, and former Florida Gov. Jeb Bush (R), with 8%. No other candidate had more than 3%.
For his part, Carson celebrated the results on Facebook.
"We the People continue to surge!" Carson wrote next to an image blaring: "BEN'S ON TOP!"