The announcement, which offered no details, came just before a new Telemundo-NBC News-Wall Street Journal poll found strong support for presumptive Democratic presidential nominee Hillary Clinton among Hispanic voters. Seventy-six percent said they favored Clinton's bid for president, while 14 percent said they support Trump.
Trump's approval rating with Hispanic voters is dismal, according to the poll, with 82 percent holding a negative view and 11 percent having a positive view. Sixty-four percent viewed Clinton favorably, while 25 percent viewed her unfavorably.
Trump has repeatedly claimed Hispanics "love" him, but his plans to specifically engage those voters seem to be an acknowledgment that he has work to do.
Paul Manafort, chairman of the Trump campaign, confirmed the business mogul's plans to make direct appeals to black and Hispanic voters after the convention.
"We're putting the specific schedule together, but the point that Chairman Priebus was making is that we are not isolating our campaign to just segments of the population," Manafort said on CBS's "Face the Nation."
Manafort said Trump's economic message will resonate, especially with African Americans living in economically distressed areas.
"We're going to campaign through all segments of society," he told The Washington Post, declining to share specifics.
Priebus said the Republican Party has to improve its numbers within minority communities, even as he defended the GOP's efforts to reach out to nonwhite voters.
"We've got a bigger party than we've ever had. We're got over 500 full-time staffers and a full-time presence in the black and Hispanic communities," Priebus said. "We also have a long way to go. ... Bottom line, we have to do better. Donald Trump understands that."
Priebus and Manafort were interviewed in Cleveland, where the Republican National Convention will start Monday.
Ed O'Keefe in Cleveland contributed to this report.