- Aberdeen City Branch
- Aberdeen Universities Branch
- Aberdeenshire Branch
- Angus Branch
- Argyll and Bute Branch
- Ayrshire and Arran Health Branch
- British Waterways Board
- Capability Scotland
- Carstairs Branch
- City of Edinburgh Branch
- Clackmannanshire Branch
- Dumfries and Galloway Branch
- Dundee City Branch
- Dundee University Branch
- East Ayrshire Branch
- East Dunbartonshire Branch
- East Lothian Council Branch
- East Renfrewshire Branch
- Falkirk Council Branch
- Fife Health Branch
- Fife UNISON Branch
- Forth Valley Health Branch
- Gas Branch Scotland
- Glasgow Caledonian University Branch
- Glasgow City Branch
- Glasgow University Branch
- Grampian Health Branch
- Heriot Watt University Branch
- Highland Branch
- Highland Health Branch
- Housing and Care Scotland Branch
- Inverclyde Branch
- Lanarkshire Health Branch
- Lothian Health Branch
- Midlothian Branch
- Moray Council Branch
- Napier University Branch
- NHS 24 Branch
- NHS Glasgow, Clyde and CVS Branch
- North Ayrshire Branch
- North Lanarkshire Branch
- Orkney Health Branch
- Orkney Local Services Branch
- Perth and Kinross Branch
- Police Staff Scotland Branch
- Quarriers Homes
- Renfrewshire Council Branch
- Scottish Ambulance Service Branch
- Scottish Borders Branch
- Scottish Children’s Reporters
- Scottish Electricity
- Scottish Fire and Rescue Branch
- Scottish Healthcare Branch
- Scottish Qualifications Authority Branch
- Scottish Regulation of Care Branch
- Scottish Water Branch
- SEPA Branch
- Shetland UNISON
- Skills Development Scotland Branch
- South Ayrshire Branch
- South Lanarkshire Branch
- SSE Scotland
- St Andrews University Branch
- Stirling Council Branch
- Stirling University Branch
- Strathclyde University Branch
- Tayside Healthcare Branch
- UNISON Scotland Further Education Branch
- University of Edinburgh Branch
- West Dunbartonshire Branch
- West Lothian Council Branch
- West of Scotland University Branch
- West of Scotland Voluntary Sector Branch
- Western Isles Health Branch
- Western Isles Local Government Branch
Scotland's biggest and liveliest public service trade union, representing workers delivering public and related services across Scotland.