"Make America Great Again" (MAGA, US: /ˈmæɡə/) is an American political slogan most recently popularized by Donald Trump during his presidential campaigns in 2016, 2020, and 2024. "MAGA" is also used to refer to Trump's ideology, political base, or to an individual or group of individuals from within that base. The slogan became a pop culture phenomenon, seeing widespread use and spawning numerous variants in the arts, entertainment and politics, being used by both supporters and opponents of Trump's presidency and as the name of the super PAC Make America Great Again Inc.

Originally used by Ronald Reagan as a campaign slogan in his 1980 presidential campaign ("Let's Make America Great Again"), it has since been described as a loaded phrase. It has been described as a slogan representing American exceptionalism and promoting an idealistic or romanticized American past that excludes certain groups. Multiple scholars, journalists, and commentators have called the slogan racist, regarding it as dog-whistle politics and coded language.

"Let's make America great again" was famously used in Ronald Reagan's 1980 presidential campaign. At the time, the United States was suffering from a worsening economy at home marked by stagflation. Using the country's economic distress as a springboard for his campaign, Reagan used the slogan to stir a sense of patriotism among the electorate. During his acceptance speech at the 1980 Republican National Convention, Reagan said, "For those without job opportunities, we'll stimulate new opportunities, particularly in the inner cities where they live. For those who've abandoned hope, we'll restore hope and we'll welcome them into a great national crusade to make America great again."

The phrase was used in speeches by Bill Clinton during his 1992 presidential campaign. President Clinton also used the phrase in a radio commercial aired for wife Hillary Clinton's 2008 presidential primary campaign. During the 2016 electoral campaign, in which Hillary Clinton opposed Trump, he suggested that Trump's version, used as a campaign rallying cry, was a message to White Southerners that Trump was promising to "give you an economy you had 50 years ago, and ... move you back up on the social totem pole and other people down."

In December 2011, following speculation that he would challenge sitting president Barack Obama in the 2012 United States presidential election, Trump released a statement in which he said he was unwilling to rule out running as a presidential candidate in the future, explaining "I must leave all of my options open because, above all else, we must make America great again." In December 2011, he also published a book using as a subtitle the similar phrase "Making America #1 Again", which in a 2015 reissue was changed to "Make America Great Again!" On January 1, 2012, a group of Trump supporters filed paperwork with the Texas secretary of state's office to create the "Make America Great Again Party", which would have allowed Trump to be that party's nominee if he had decided to become a third-party candidate in the presidential election.

Trump began using the slogan formally on November 7, 2012, the day after Barack Obama won his re-election against Mitt Romney. Trump used the slogan in an August 2013 interview with Jonathan Karl. By his own account, he first considered "We Will Make America Great", but did not feel like it had the right "ring" to it. "Make America Great" was his next slogan idea, but upon further reflection, he felt that it was a slight to America because it implied that America was never great. He eventually selected the phrase "Make America Great Again", later claiming that he was unaware of Reagan's use in 1980 until 2015, but noted that "he didn't trademark it." On November 12, he signed an application with the United States Patent and Trademark Office requesting exclusive rights to use the slogan for political purposes. It was registered as a service mark on July 14, 2015, after Trump formally began his 2016 presidential campaign and demonstrated that he was using the slogan for the purpose stated on the application.

However, Trump did not trademark the phrase in commerce. On August 5, 2015, radio personality Bobby Bones took note of this and successfully filed a trademark for the phrase's use in commerce. Two days later Bones tweeted at Trump, offering the use of his slogan back in exchange for a $100,000 donation to the St. Jude Children's Research Hospital. On October 29, Bones followed up the tweet with an image of a check from the Trump Organization. The amount on the check was undisclosed and Bones said that Trump could "have [his] slogan back".

Following Trump's first election, the website of his presidential transition was established at greatagain.gov. Trump said in 2017 and 2018 that the slogan of his 2020 reelection campaign would be "Keep America Great" and he sought to trademark it. However, Trump's 2020 campaign continued to use the "Make America Great Again" slogan. Trump's vice president, Mike Pence, used the phrase "make America great again, again" in his 2020 Republican National Convention speech, garnering ridicule for implying that Trump's first term had failed. In late 2021, this phrase became the name of a pro-Trump Super-PAC, which was also mocked. A 2020 executive order, titled "Promoting Beautiful Federal Civic Architecture", was nicknamed "Make Federal Buildings Beautiful Again" by proponents and the press.