According to the poll, 65% of U.S. adults said they support the demonstrations. Twenty-seven percent said they feel "somewhat" connected to the cause of racial injustice and 23% said they feel "very" connected.
Black Americans, young adults and Democrats are the most likely groups to support and feel connection to the issue, the survey said.
Republicans were the only group that polled below 50% on the issue. Twenty-two percent said they support the activists.
"Republicans are also least likely to report feeling connected to the protests, with 14% saying they feel very or somewhat connected to the cause," Gallup wrote. "While small majorities of White Americans and adults aged 50 and older support the protests, fewer in these groups report feeling connected to them."
The poll also found that one in five adults said the protests have changed their view about racial injustice. Thirty-one percent of Blacks, 26% of Asian Americans, 24% of Hispanics and 18% of Whites said their view changed "a lot."
Regarding the impact of the protests, 53% said the demonstrations will help, rather than hurt, public support for addressing racial injustice. Thirty-nine percent of Whites said the protests will hurt the cause.
Gallup polled more than 36,400 U.S. adults for the survey, which has a margin of error of between 1.4 and 8.8 points.