| Tuesday 3 January 2012 | *Iowa Caucus1 | *Iowa Caucus |
| Tuesday 10 January 2012 | *New Hampshire Primary1 | *New Hampshire Primary |
| Saturday 21 January 2012 | *Nevada Non-binding Precinct Viability Caucuses1 | *South Carolina Primary |
| Saturday 28 January 2012 | *South Carolina Presidential Primary/Precinct Reorganization meeting1 | |
| Sunday 29 January - Saturday 3 March 2012 | | *Maine Municipal Caucuses / non-binding straw poll |
| Tuesday 31 January 2012 | | *Florida Primary |
| Saturday 4 February 2012 | | *Nevada Precinct Caucuses |
| Tuesday 7 February 2012 | *Missouri Primary1 | *Colorado Precinct Caucuses
*Minnesota Precinct Caucuses / non-binding straw poll |
| Sunday 26 February 2012 | *Maine Municipal Caucuses | |
| Tuesday 28 February 2012 | | *Arizona Primary
*Michigan Primary |
| Saturday 3 March 2012 | | *Washington Precinct Caucuses / Non-binding Straw Poll |
| Tuesday 6 March 2012 | *American Samoa Territorial Caucus1
*Colorado Precinct Caucus1
*Georgia Primary1
*Massachusetts Primary1
*Ohio Primary1
*Oklahoma Primary1
*Tennessee Primary1
*Virginia Primary (only 1 candidate qualified - primary cancelled)1
*Vermont Primary1 | *Georgia Primary
*Idaho County Caucuses
*Massachusetts Primary
*North Dakota Caucus
*Ohio Primary
*Oklahoma Primary
*Tennessee Primary
*Virginia Primary
*Vermont Primary |
| Tuesday 6 March - Saturday 10 March 2012 | | *Wyoming County Conventions |
| Tuesday 6 March - Saturday 24 March 2012 | | *Alaska District Conventions |
| Tuesday 6 March - Saturday 31 March 2012 | *Maine County Conventions1 | |
| Tuesday 6 March - Sunday 8 April 2012 | *Minnesota Organizing Unit Conventions1 | |
| Wednesday 7 March 2012 | *Hawaii Precinct Caucus1 | |
| Saturday 10 March 2012 | | *Guam Territorial Caucus
*Kansas Caucuses
*Northern Marianas Commonwealth Convention
*Virgin Islands Territorial Caucus |
| Tuesday 13 March 2012 | *Alabama Primary1
*Mississippi Primary1
*Utah Caucuses1 | *Alabama Primary
*American Samoa Territorial Caucus
*Hawaii Precinct Caucuses
*Mississippi Primary |
| Thursday 15 March - Saturday 24 March 2012 | | *Missouri County Caucuses |
| Sunday 18 March 2012 | | *Puerto Rico Primary |
| Tuesday 20 March 2012 | *Illinois Primary1 | *Illinois Primary |
| Saturday 24 March 2012 | *Louisiana Primary1 | *Louisiana Primary |
| Friday 30 March - Monday 23 April 2012 | | *Kansas Congressional District Conventions |
| Saturday 31 March 2012 | *Arizona Congressional District Caucuses1 | |
| Saturday 31 March - Sunday 22 April 2012 | | *Minnesota District Conventions |
| Tuesday 3 April 2012 | *District of Columbia Primary1
*Maryland Primary1
*Wisconsin Primary1 | *District of Columbia Primary
*Maryland Primary
*Wisconsin Primary |
| Saturday 7 April 2012 | | *Tennessee State Executive Committee (tentative date) |
| Tuesday 10 April - Saturday 14 April 2012 | *Alaska Precinct / House District Caucuses1 | |
| Thursday 12 April - Friday 13 April 2012 | | *Colorado District Conventions |
| Thursday 12 April - Saturday 14 April 2012 | | *Wyoming Convention |
| Saturday 14 April 2012 | *Idaho County Caucus1
*Kansas Local Unit Conventions1
*Nebraska Precinct Caucuses1
*Wyoming County Caucuses1 | *Colorado State Convention |
| Sunday 15 April 2012 | *Washington Precinct Caucuses1 | |
| Saturday 21 April 2012 | *Texas County/Senatorial District Conventions1 | |
| Tuesday 24 April 2012 | *Connecticut Primary (only 1 candidate - no primary will be held)1
*New York Primary1
*Pennsylvania Primary1
*Rhode Island Primary1 | *Connecticut Primary
*Delaware Primary
*New York Primary
*Pennsylvania Primary
*Rhode Island Primary |
| Thursday 26 April - Saturday 28 April 2012 | | *Alaska State Convention |
| Saturday 28 April 2012 | *Iowa District Conventions | *Kansas State Party Committee Meeting |
| Tuesday 1 May - Sunday 6 May 2012 | *Democrats Abroad Global Primary1 | |
| Tuesday 1 May - Wednesday 30 May 2012 | *Delaware Representative District Caucuses / Party-run Primary1 | |
| Thursday 3 May 2012 | *District of Columbia State Party Committee | |
| Saturday 5 May 2012 | *Florida County Caucuses1
*Guam Territorial Caucus (Party run primary)1
*Michigan Precinct Caucuses1 | |
| Saturday 5 May - Sunday 6 May 2012 | | *Maine District Caucuses and State Convention
*Nevada State Convention |
| Tuesday 8 May 2012 | *Indiana Primary1
*North Carolina Primary1
*West Virginia Primary1 | *Indiana Primary
*North Carolina Primary
*West Virginia Primary |
| Friday 11 May - Sunday 13 May 2012 | *Alaska State Party Convention | |
| Saturday 12 May 2012 | *Maryland State Democratic Central Committee Meeting | |
| Tuesday 15 May 2012 | *Oregon Primary1 | *Oregon Primary |
| Friday 18 May - Saturday 19 May 2012 | | *Minnesota State Convention |
| Saturday 19 May - Sunday 20 May 2012 | *Democrats Abroad Global Convention | |
| Saturday 19 May - Friday 1 June 2012 | *Colorado District Conventions | |
| Sunday 20 May 2012 | *Washington Congressional District Caucuses | |
| Tuesday 22 May 2012 | *Arkansas Primary1
*Kentucky Primary1 | *Arkansas Primary
*Kentucky Primary |
| Saturday 26 May 2012 | *Wyoming State Convention | |
| Tuesday 29 May 2012 | | *Texas Primary |
| Wednesday 30 May - Thursday 31 May 2012 | | *New York State Committee |
| Wednesday 30 May - Saturday 2 June 2012 | | *Washington State Convention |
| Friday 1 June - Sunday 3 June 2012 | *Washington State Convention | |
| Saturday 2 June 2012 | *Colorado State Convention | *Missouri State Convention |
| Saturday 2 June - Sunday 3 June 2012 | *Maine State Convention.
*Virgin Islands Territorial Convention1 | |
| Sunday 3 June 2012 | *Puerto Rico Senate District Caucuses1 | |
| Tuesday 5 June 2012 | *California Primary1
*Montana Primary1
*North Dakota Legislative District Caucus1
*New Jersey Primary1
*New Mexico Primary1
*South Dakota Primary1 | *California Primary
*New Jersey Primary
*New Mexico Primary
*South Dakota Primary |
| Friday 8 June - Saturday 9 June 2012 | *Texas State Convention | *Illinois Convention
*Indiana State Convention |
| Saturday 9 June 2012 | *Kansas State Convention | *New Mexico State Republican Convention |
| Saturday 9 June - Sunday 10 June 2012 | *Nevada State Convention | |
| Sunday 10 June 2012 | | *Pennsylvania Summer Meeting (tentative date) |
| Thursday 14 June - Saturday 16 June 2012 | *Idaho State Convention | *Montana State Convention |
| Saturday 16 June 2012 | *Arkansas Special State Convention
*Iowa State Convention
*North Dakota State Delegate Selection Meeting | *Iowa State Convention |
| Saturday 23 June 2012 | *Nebraska State Convention | |
| Sunday 24 June 2012 | *California Delegation Meeting | |
| Tuesday 26 June 2012 | | *Utah Primary |
| Saturday 14 July 2012 | | *Nebraska State Convention |
