But even many of the "birthers" who like the former Alaska governor do not support her for president, Public Policy Polling said. In the overall contest for the Republican presidential nomination, former Arkansas Gov. Mike Huckabee leads the field at 20 percent, followed by former Massachusetts Gov. Mitt Romney at 17 percent, Palin at 15 percent and former House Speaker Newt Gingrich at 12 percent.
Only 19 percent of "birthers" said they support Palin while 24 percent back Huckabee.
The poll released Tuesday reported just over half of the likely Republican primary voters surveyed do not believe Obama was born in the United States while 28 percent do.
"Any thought that the birther theory has been put to rest can be thrown out the window with this poll," said Dean Debnam, the organization's president.
Respondents were also asked who among the top four candidates would be a good presidential or vice presidential candidate. Romney led with 50 percent saying he would be a good presidential candidate and 24 percent picking vice president, followed by Huckabee at 44 percent and 28 percent.
Only 29 percent said Palin would be good for president, while 46 percent liked her as a vice presidential candidate.
Public Policy Polling surveyed 400 likely Republican primary voters from Feb. 11 to Feb. 13. The margin of error is 4.9 percentage points.