Melania Trump has been the subject of extensive media attention and public interest during her tenures as first lady of the United States from 2017 to 2021, and again since 2025. Her private nature led many to speculate about her personality, her beliefs, and her thoughts about being first lady. Her wardrobe was of particular interest to the public, not only because it is a common subject discussed in regard to first ladies but because of her past as a fashion model. Also of interest was the fact that she was only the second foreign-born woman to be first lady, which was culturally significant both in the United States and in her home country of Slovenia. Trump had low approval ratings relative to previous first ladies, but she was regularly rated as the most popular member of the Trump family.

Melania Trump has cultivated her public image by limiting public interaction, minimizing public statements and declining to answer questions about her life. Such is the secrecy around her life that one biographer, Mary Jordan, reported that she had to engage in clandestine interactions with associates of the Trumps to get information. The relative lack of information has allowed spectators to impose various interpretations of her life onto Melania. She has been portrayed as an innocent victim of an aggressive husband, an immigrant who was thrust into the public spotlight against her will, a vapid model with no input of her own, and a woman who became successful purely through luck. She is often seen as cold by the public, though people who interact with her describe her as a warm presence. Her private nature is contrasted with her sociable stepdaughter Ivanka, who Donald often put on equal footing with Melania when discussing them and had regularly had them on either side of him when having his photo taken.

Melania is seen as a contrast to Donald, as she is more reserved compared to his assertive personality. Both, however, have lived relatively solitary lives. First lady biographer Betty Boyd Caroli compared Trump's deliberate obscurity as first lady to Bess Truman, who similarly avoided taking on a large staff or being active in major initiatives while she was first lady. CNN White House correspondent Kate Bennett wrote in her biography of Melania Trump that she was "one of the most private and guarded first ladies in modern history". Trump's staff were instructed to ignore all media questions while she was first lady, including those about her official activities and where she was at a given time. This led to false rumors that she had abandoned the first ladyship after she was not seen for three weeks in 2018.

Rumors persisted throughout the Trump presidency that Melania and Donald had a secret animosity toward one another. This was amplified by her decision not to immediately move to the White House and again upon the discovery that Donald may have committed adultery with Stormy Daniels. Other incidents also provoked speculation, such as a video of her swatting her husband's hand away in May 2017, her trip to see detained children at the border in June 2018, and a tweet in support of LeBron James's charity work a day after Donald criticized the basketball player in August 2018. One urban legend was widely spread claiming that she had moved out of the White House into a home in Potomac, Maryland, with her parents. The rumors led to popular use of the hashtag #FreeMelania by those who believed them. Though she disliked the idea that people saw her as helpless, Melania found the campaign amusing. This became less common by 2020 as she took a more active role in the administration. She was also seen as unhappy because she was rarely seen smiling in public, to which she responded that she does not believe in fake smiles – an effect of her Slovenian upbringing, where smiling socially is less common. Chris Christie, who worked closely with the Trumps in the 2016 presidential campaign, cast doubt on the rumors, saying that Melania was independent but supported her husband.

As with previous first ladies, Trump's fashion was heavily scrutinized, and particularly expensive pieces were criticized. More than other first ladies, her fashion was scrutinized in the context of her past as a fashion model and her marriage to a billionaire. Vogue compared her wardrobe as first lady to those of Jacqueline Kennedy and Nancy Reagan, and it said that she preferred "strongly tailored pieces", wearing almost exclusively outfits designed by high-end designers. Melania's wardrobe played into fashion diplomacy, in which her clothes delivered political statements or conveyed certain messages. In some cases, her lack of political involvement caused a subversion of fashion diplomacy in which "her message is that there is no message". Despite her experience in fashion, she disliked that it was such a major aspect of news coverage about her as first lady.

Coats were a common trademark of Melania's fashion, and she sometimes wore them on her shoulders without using the sleeves. During formal events, she commonly wore Dior dresses accentuated with gloves and wore her hair up. Melania worked closely with Hervé Pierre when styling her fashion, but they dismissed the idea that he worked as her wardrobe stylist. She retained her previous hair stylist Mordechai Alvow and her previous make up artist Nicole Byrl when she became first lady. She preferred to do her own shopping, typically from Net-a-Porter. The fashion industry generally leans away from the Trump administration's politics, and many fashion designers have stated that they refuse to work with Melania because of political differences. When preparing for speeches, she dedicated more attention to her physical appearance than content or delivery, which her staff felt affected her ability to promote her causes. In public, Melania came to be known for her distinctive squinting expression that she often wore. The official portrait of Melania Trump by Régine Mahaux for Melania's second term as First Lady sparked attention as this was the first official portrait of a First Lady in black and white ever since a choice between a color photograph or a black and white photograph was available.

Trump has been identified and described as having Mar-a-Lago face.

Since the only other foreign-born first lady, Louisa Adams, was born in London as the daughter of an American, Melania has been seen by the American public as the first foreigner first lady. In both the United States and Slovenia, she is seen as ignoring or disregarding her Slovenian heritage. Having a Slovenian-born woman as the American first lady became a point of national pride in Slovenia, and it gave the nation a sense of recognition on the world stage. This includes an element of commodification as imagery of the first lady is used as a sort of national brand, particularly in the tourism industry. Slovenia was particularly susceptible to this phenomenon as a post-communist nation that had yet to fully develop its own identity. Melania Trump's hometown Sevnica has developed a small tourist industry around her, and Melania-themed merchandise was common during her tenure as first lady. These items never use Melania's full name, substituting it with "first lady" or "M", as she is protective of her personality rights.