Businesses
- S and RC Walker and Son, solicitor
- Sackville Street Club
- Salthill Hotel
- Salvation Army
- Samuel Jones and Company
- Sandford Arms Hotel
- Sanitas Company Limited
- Savoy Cocoa Company Limited
- Saxone Shoe Company Limited
- School of Musketry
- Scottish Widows' Fund Society
- Sea Insurance Company Limited
- Sealy, Bryers and Walker Limited, printers and publishers
- Second Cooperative Building Society
- Sedgwick, Collins and Company Limited
- Servant's Registry Office
- Sewell Son and Simpson Limited
- Shamrock Shipping Company Limited
- Shannon Rowing Club
- Shelbourne Hotel
- Shelbourne Hotel Company
- Shelbourne Sports Company Limited
- Sheppard and Company, dairy
- Ship Hotel
- Shipping Federation Limited
- Shirley Spence and Belford Limited, wholesale druggists and general merchants
- Simpson and Wallace
- Simpson's Hospital
- Sinclair Fitzgerald
- Singer Sewing Machine Company Limited
- Sinn Féin Cooperative Peoples' Bank Limited
- Sir Patrick Dun's Hospital
- Sisters of Charity
- Skilbeck Brothers
- Slieve Donard Hotel
- Sligo Hotel
- Smith and Barton
- Smith and Pearson Limited, structural engineers
- Smith and Sheppard
- Smyth and Company Limited, hosiery warehouse
- SN Robinson and Company
- Society for Promoting Christianity amongst the Jews [Church of Ireland Jews' Society]
- Society of Jesus
- South Dublin Union
- South Irish Horse, 1st Corps Cavalry
- Southern Tanning Company Limited
- Spa Hotel
- Spencer Arms Hotel
- Spillers and Bakers Limited
- Sprengel Brothers
- St Ann's church
- St Dominick's Conference of the Society of St Vincent de Paul
- St John Ambulance Brigade
- St John Maddle Irene, fancy draper
- St Kevin's Band
- St Michael and John's Church
- St Michan's Church
- St Patrick's Ambulance Association
- St Patrick's College
- St Peter's Presbytery
- St Stephen's Green Club
- St Stephen's Parochial Hall
- St Stephen's schools
- St Vincent's College
- St Vincent's Hospital
- Standard Hotel
- Stanuell and Son, solicitors
- Star Furnishing Company
- Station Hotel
- Stephens and Bourke, boot and shoe dealers
- Stevens Nurses' Home
- Stewart and Orr
- Stopford and Turner
- Strahan and Company Limited
- Strand Hotel
- Studio Lis-na-Crum
- Sutton and Company Carriers
- Swift Brothers
- Switzer and Company Limited