Singh overtook former No. 1 Tiger Woods thanks to a stellar campaign in 2004 that saw him win nine times on the PGA Tour, including his second PGA Championship. Woods meanwhile completes 2004 as the second-ranked player in the world, 1.19 points behind Singh.
Ernie Els held onto the third spot followed by U.S. Open champion Retief Goosen and Masters winner Phil Mickelson. Padraig Harrington remained at No. 6 as the top-ranked European player in the world.
Sergio Garcia was next at No. 7 while Mike Weir, Davis Love III and Stewart Cink rounded out the top 10.
Adam Scott came in at No. 11, followed by Miguel Angel Jimenez, who won five times in 2004. Stuart Appleby was next at No. 13 with Darren Clarke and Chris DiMarco at No. 14 and No. 15, respectively.
British Open champion Todd Hamilton was 16th while Stephen Ames, Kenny Perry, Chad Campbell and David Toms filled in the rankings from 17-20.
Kiyoshi Miyazato of Japan won the Asia Japan Okinawa Open and in the process moved up to No. 301 in the world.
Final 2004 World Rankings