SSIS may refer to:

• Saigon South International School
• Scandinavian Society for Iranian Studies
• Shanghai Singapore International School
• Suzhou Singapore International School
• SQL Server Integration Services
• State Security Investigations Service, former Egyptian intelligence service
• Swiss School in Singapore
• Social Skills Improvement System, an assessment of social, motivational, and academic behaviors in children

• Chittenden-3-10 Vermont Representative District, 2002-12
• Chittenden-3-1 Vermont Representative District, 2002-12
• Chittenden-3-2 Vermont Representative District, 2002-12
• Chittenden-3-3 Vermont Representative District, 2002-12
• Chittenden-3-4 Vermont Representative District, 2002-12
• Chittenden-3-5 Vermont Representative District, 2002-12
• Chittenden-3-6 Vermont Representative District, 2002-12
• Chittenden-3-7 Vermont Representative District, 2002-12
• Chittenden-3-8 Vermont Representative District, 2002-12
• Chittenden-3-9 Vermont Representative District, 2002-12
• Chittenden-4 Vermont Representative District, 2002-12
• Chittenden-5-1 Vermont Representative District, 2002-12
• Chittenden-5-2 Vermont Representative District, 2002-12
• Chittenden-6-1 Vermont Representative District, 2002-12
• Chittenden-6-2 Vermont Representative District, 2002-12
• Chittenden-6-3 Vermont Representative District, 2002-12
• Chittenden-7-1 Vermont Representative District, 2002-12
• Chittenden-7-2 Vermont Representative District, 2002-12
• Chittenden-8 Vermont Representative District, 2002-12
• Chittenden-9 Vermont Representative District, 2002-12
• Chittenden County Courthouse
• Chittenden & Eastman Company
• Chittenden, Thomas
• Chittendra Nath Mazumder
• Chittening railway station