Usually around 70 percent
http://www.census.gov/prod/2006pubs/p20-556.pdf
Actually the newest Statistical Abstract of the US (with estimates from 2010) says barely 60% in one place, and just over 60% in another.
According to the United States Census Bureau's 2014 report, there are approximately 146,311,000 registered voters out of a potential 218,959,000 eligible to vote. This amounts to a percentage of ~66.82%.
Note that the Census Bureau releases statsitics reports on voter data every two years. The 2016 report will not be released until November of that year (to coincide with November elections).
Whilst there is no public data for last years Presidential election, 64% of those who were eligible to vote actually cast a vote during the Presidential election of 2008.
According to one website, about 67% of eligible Americans are registered to vote.
30 percent
there are supposedly 575,000 registered voters in detroit. there are only 625,000 people over 18 there! 92% are registered to vote?
All registered US voters.
190 million
There are no official numbers, as the Church of Jesus Christ of Latter-day Saints (the "Mormon" church) doesn't ask its members if they are registered voters, and you do not need to disclose your religion in order to register to vote. Most American adults are registered to vote, but many do not actually vote. Mormons are encouraged to vote, so the percentage of registered Mormon voters may be higher than the general population. As a conservative estimate, I'd say there are at least 3 million registered Mormon voters in the US.
Registered voters. That means you are 18, a US Citizen, not a convicted felon, and registered to vote.
Elegible and registered
Yes
150 milliuon
Charles Krauthammer said on Inside Washington that 22% of US voters are Liberal and twice that are Conservative
Enough for obama to win the election
Enough for obama to win the election