The IWA has five area branches - for North Wales, West Wales, Swansea Bay, Gwent and Cardiff and the Valleys. A sixth branch - IWA Women - has been formed to raise the profile of women's concerns in Wales and to increase the engagement of women with the IWA and civic society in Wales more generally. The Chairs of the branches are also members of the Board of Trustees.
Wales in London, which was formed in 1994 by the amalgamation of the IWA's London branch and the London Welsh Publicity Society, is now an autonomous organization affiliated to the IWA.
The IWA has been highly successful in:
- project management and fund-raising for research projects. Its annual income is approximately £300,000.
- creating relationships with trusts and foundations. The IWA research programme has been assisted by funding from the following trusts: Joseph Rowntree Charitable Trust, the Joseph Rowntree Foundation, The Leverhulme Trust (via UCL), the Jane Hodge Foundation and the Gwendoline and Margaret Davies Charitable Trust.
- forming links with public and private sector bodies. Organisations that have commissioned research from the IWA include the Welsh Assembly Government, WDA, Wales Tourist Board, Cardiff Bay Development Corporation, Council of Welsh TECs, Equal Opportunities Commission, Commission for Racial Equality, Disability Rights Commission, Welsh Language Board, Welsh Consumer Council, Basic Skills Agency, One North East (the regional development agency for the north east of England). Other sponsors have included several local authorities, CBI Wales, Barclays Bank, Pfizer, British Road Federation, Rachel's Dairies and Francis Balsom Associates.
- academic collaboration. In partnership with UWIC the IWA organises Academy Health Wales, a multi-disciplinary forum for the health and social services in Wales. It has also signed a Memorandum of Understanding with Cardiff University, under which the IWA will work the university's Wales Governance Centre and other departments to further each other's aims.
The IWA has also worked on major projects with the Constitution Unit of University College London, Cardiff University's Centre for Advanced Studies and Cardiff Business School as well as the University of Glamorgan.