Nationwide public opinion polls that were conducted relating to the 2012 United States presidential election are as follows. The election was between Democratic Incumbent President Barack Obama, Republican Mitt Romney, as well as other third-party and independent challengers. The persons named in the polls were official candidates in the general election or former candidates for a particular party's nomination.

General election of 2012

Since convention nominations

Two-way race

''*RV means "registered voters"; LV means "likely voters"; A means "adults". Polls with a (D), (R), or (L) indicate that they were sponsored by partisan groups affiliated with a party.''

Three-way race

*RV means "registered voters"; LV means "likely voters"

Four-way race

*RV means "registered voters"; LV means "likely voters"

Five-way race

*RV means "registered voters"; LV means "likely voters"

Before Convention Nominations

Both convention nominations were completed by September 6, 2012.

Two-way race

Two-way race with Gary Johnson Three-way race with Gary Johnson

Hypothetical three-way race

Five-way race

Democratic primary

President Barack Obama ran uncontested in most states for the 2012 Democratic presidential nomination. Hypothetical polling

Republican primary

See Nationwide opinion polling for the Republican Party 2012 presidential primaries