The 11th South Pacific Games, also known as Guam 1999 (Chamorro: Guåhån 1999), held in Santa Rita and Hagåtña, Guam from 29 May to 12 June 1999, was the eleventh edition of the South Pacific Games.

[2] ^* Congressman Robert A. Underwood stated that more than 3,000 athletes were welcomed for the 1999 SPG.

[3] ^a Congressman Underwood recorded 26 sporting events,[4] but the results for wrestling listed the freestyle and Greco-Roman medals separately and the results for weightlifting listed the clean and jerk, snatch, and overall medals separately.

[7] ^b The Guam Bodybuilding website reported Ricky Collins as winning gold in the heavyweight division for bodybuilding at 1999 South Pacific Games,[8] but this may not have been an official event in the 1999 Games.

[7] ^c Solomon Islands beach volleyball team's first appearance was in the 1999 Guam South Pacific Games.