Johnson finished in a second-place tie with Tiger Woods on Sunday, firing a 20-under-par 268, to move 12 spots from No. 53 to 41 in the rankings. Woods retained his position in the No. 1 spot, while tournament champion Vijay Singh remained second.
Mark Hensby was also a mover in this week's rankings, climbing from 34th to No. 28 after outlasting Henrik Stenson in a playoff to win the Scandinavian Masters. Hensby was the first Australian ever to win the event.
Like Woods and Singh, the remainder of the world's top-10 held firm in their spots in the rankings.
Ernie Els was third again, although he announced last week that he could miss the remainder of the 2005 season after undergoing knee surgery to repair an ACL injury he suffered two weeks ago while sailing.
Phil Mickelson was fourth, followed by Retief Goosen, Sergio Garcia, Adam Scott, Padraig Harrington, Jim Furyk and Kenny Perry to round out the top-10.
David Toms leapfrogged Chris DiMarco to claim the 11th spot in the rankings. After that, positions 13-19 remained the same with Angel Cabrera, Luke Donald, Darren Clarke, David Love III, Fred Couples, Tim Clark and Stewart Cink all holding on to their spots.
Michael Campbell replaced Justin Leonard at No. 20.