1999 Pan Pacific Swimming Championships – Men's 100 metre backstroke

The men's 100 metre backstroke competition at the 1999 Pan Pacific Swimming Championships took place on August 23–24 at the Sydney International Aquatic Centre. The last champion was Lenny Krayzelburg of US. This race consisted of two lengths of the pool, all in backstroke.

1999 Pan Pacific Swimming Championships – Men's 100 metre backstroke

The men's 100 metre backstroke competition at the 1999 Pan Pacific Swimming Championships took place on August 23–24 at the Sydney International Aquatic Centre. The last champion was Lenny Krayzelburg of US. This race consisted of two lengths of the pool, all in backstroke.