On May 8, the U.S. Census Bureau released its study of voting from the November 2012 election. The Bureau issues a report after each presidential and congressional election. Here is a link to the various tables.
Table 4a shows the voter turnout. One column calculates the turnout, as a percentage of the eligible adult citizen population. That column, headed “percent voted (citizen)” shows that Oklahoma had the third lowest turnout of any state. Oklahoma, in 2012 and in each of the two previous presidential elections as well, has not permitted anyone to vote for President other than the Democratic and Republican nominees. The only two states with lower turnout were West Virginia and Hawaii.
Table 10 has “Reasons for not voting”, but this table merely presents data for the entire United States, and does not break it down by state. The four leading reasons individuals gave for not voting are: (1) “Too busy, conflicting schedules”; (2) “Not interested”; (3) “Illness or Disability”; (4) “Did not like candidates.” It would be interesting to this data broken down by state.
Table 12 shows method of registration. National Journal has an interesting story, highlighting that data. Thanks to Rick Hasen for that link.