The men's 800 metre freestyle competition at the 2006 Pan Pacific Swimming Championships took place on August 17 at the Saanich Commonwealth Place.

[1][2] The last champion was Grant Hackett of Australia.

[3] This event was a timed-final where each swimmer swam just once.

The top 8 seeded swimmers swam in the evening, and the remaining swimmers swam in the morning session.

[4][5] Prior to this competition, the existing world and Pan Pacific records were as follows: All times are in minutes and seconds.