The county of Dorset, is and has been divided in many ways.

• Dorset Council
• Bournemouth, Christchurch and Poole Council

These authorities are divided into wards for electoral purposes.

• See List of boroughs in Dorset Boroughs were also divided into wards for electoral purposes.
• See List of sanitary districts in Dorset

• See List of parliamentary constituencies in Dorset

• See List of civil parishes in Dorset

• See List of hundreds in Dorset

• See List of liberties in Dorset

• List of places in Dorset
• List of settlements in Dorset by population