[1][2] Its territory includes parishes, monasteries, and missions located in Alaska.

The Diocese was founded when Alaska was part of Russia and is one of the oldest in the United States.

Altogether, twenty-three churches are listed on the National Register of Historic Places; thirty churches are considered National Historic Landmarks.

[4] According to the Los Angeles Times, the diocese had around 30,000 members statewide as of 2006.

The deans coordinate activities in their area's parishes, and report to the diocesan bishop.