- Dams. see Water reservoirs
- Delegated administrative authorities
- Delegated legislation. see Regulations
- Dental care
- McNeely, E316
- Deputy ministers
- Diabetes prevention strategy
- Diagnostic imaging
- Divisions (recorded vote)
- bills referred to committee
- Accepting Schools Act, 2012 (Bill 13), SP249–SP250
- Anti-Bullying Act, 2012 (Bill 14), SP249–SP250
- Ontario Underground Infrastructure Notification System Act, 2012 (Bill 8)
- Public Safety Related to Dogs Statute Law Amendment Act, 2012 (Bill 16)
- Putting Students First Act, 2012 (Bill 115), SP320
- Residential Tenancies Amendment Act (Rent Increase Guideline), 2012 (Bill 19)
- Security for Courts, Electricity Generating Facilities and Nuclear Facilities Act, 2012 (Bill 34)
- Strong Action for Ontario Act (Budget Measures), 2012 (Bill 55), F233, F237, F241, F262, F267, F269, F270, F272, F275, F276, F278, F279, F281, F284, F288
- chair's ruling, F23
- committee reports, P570
- committee schedules/agendas, G35, P60
- Ministry of Energy
- estimates (2012–2013), E205
- Ministry of Finance
- Ministry of Health and Long-Term Care
- motions
- deferral of deliberations, JP62, JP63
- dismissal of legal counsel, P55
- postponing of clause-by-clause consideration, F20
- re amendments to subcommittee reports, G175
- re Bill 2 Section 2, 3.1, F31
- re estimates, Ministry of Energy, E41
- re organization, E4, E5, E7
- recorded vote, F267, F269, F270, F272, F275, F276
- subcommittee reports, E152, E155
- bills referred to committee
- Doctor fees/salaries
- Doctor shortage
- Doctor-patient ratios
- Doctors
- Dog attacks. see also Pit bull terriers
- Dog breeds. see also Pit bull terriers
- Dog fighting
- DiNovo, T54
- Dog owners
- Driver licences
- Drug abuse
- cocaine
- Klees, P493
- cocaine
- Durham Region