Samuel Walsh is included in a number of important national and corporate collections in Ireland including:

The Irish Museum of Modern Art, Dublin; the Arts Council of Ireland/An Chomhairle Ealaoín, Contemporary Irish Art Society, Butler Gallery, Kilkenny; Trinity College, Dublin; University of Limerick, University College Dublin, University College, Cork; National Collection of Contemporary Drawing, Limerick; Crawford Gallery, Cork; Limerick City Gallery of Art, Department of Foreign Affairs, Office of Public Works, Dublin; ABN Amro Bank Group, Dublin; Dell Computer Corporation, Limerick; the Ballinglen Archive, Ballycastle, Co. Mayo; Leinster House, Dublin; Limerick County Council, County Collection, Ennis, Co. Clare; St. Mary's Cathedral, Limerick; Dundalk Institute of Technology, Co. Louth; Mary Immaculate College of Education, Limerick; Aer Rianta, Dublin Airport; Office of the Revenue Commissioners, Dublin; RTÉ, Limerick; Dublin City University, National Self-Portrait Collection, University of Limerick; Scott Tallon Walker, Dublin; Plassey Campus Centre, University of Limerick; Dublin Dental School & Hospital, Dublin Castle, Dundalk Institute of Technology, Co Louth; The John Hunt Collection; The National Concert Hall, Dublin; Aer Cap, Shannon, Co Clare; AXA Insurance, Dublin; Villiers School, Limerick.

He is also in the following international collections:

Budapest Museum of Fine Arts, HUNGARY; Stiftung BINZ39, SWITZERLAND; The Economist, London, ENGLAND; Goldman Sachs, London, ENGLAND; Museum of Modern and Contemporary Art, Rijeka, CROATIA; Siena Art Institute, ITALY; Isis Equity Partners, London, ENGLAND.