Publications have analyzed the cultural, economic and sociopolitical influence of the Eras Tour, the 2023–2024 concert tour by the American musician Taylor Swift and the highest-grossing tour of all time. Driven by a fan frenzy called Swiftmania, the tour's impact is considered an outcome of Swift's wider influence on the 21st-century popular culture. Concert industry publication Pollstar called the tour "The Greatest Show on Earth".

The Eras Tour, as Swift's first tour after the COVID-19 lockdowns, led an economic demand shock fueled by increased public affinity for entertainment. It recorded unprecedented ticket sale registrations across the globe, including a virtual queue of over 22 million customers for the Singapore tickets. The first sale in the United States crashed controversially, drawing bipartisan censure from lawmakers, who proposed implementation of price regulation and anti-scalping laws at state and federal levels. Legal scholar William Kovacic called it the "Taylor Swift policy adjustment". Price gouging due to the tour was highlighted in the national legislatures of Brazil, Ireland, and the United Kingdom.

Characterized by inflation, trickle-down and multiplier effects, elevated commercial activity and economy were reported in the cities the Eras Tour visited, boosting local businesses, hospitality industry, clothing sales, public transport revenues and tourism more significantly than the Olympics and the Super Bowl. Cities such as Gelsenkirchen, Minneapolis, Pittsburgh, Santa Clara and Stockholm renamed themselves to honor Swift; a number of tourist attractions, including the Center Gai, Christ the Redeemer, Space Needle, Marina Bay Sands and Willis Tower, paid tributes and hosted special events. Politicians such as Canadian prime minister Justin Trudeau and Chilean president Gabriel Boric petitioned Swift to tour their countries, whereas government executives in Indonesia, New Zealand, the Philippines, Taiwan, Thailand and some states of Australia were expressly disappointed at the tour not visiting their venues.

The Eras Tour attracted large crowds of ticketless spectators tailgating outside the sold-out stadiums, with several thousands gathering in Philadelphia, Melbourne and Munich, and was a ubiquitous topic in news cycles, social media content, and press coverage. Seismic activity was recorded in Edinburgh, Lisbon, Los Angeles, Buenos Aires and Seattle due to audience energy. Swift's discography experienced surges in album sales and streams, and achieved several all-time feats on record charts; her 2019 song "Cruel Summer" peaked in its popularity and became one of her most successful singles. The accompanying concert film of the tour featured an atypical film distribution bypassing major film studios and became the highest-grossing concert film in history. Journalists dubbed Swift one of the last remaining monocultural figures of the 21st-century; Time named Swift the 2023 Person of the Year, the first and only person in the arts to receive this honor.

American singer-songwriter Taylor Swift is often recognized for her success and cultural impact. Her concert tours have all been increasingly lucrative and, after taking a break from touring due to the impact of the COVID-19 pandemic, she announced the sixth headlining concert tour of her career, the Eras Tour, in November 2022. The first United States leg of the tour was announced in November 2022, with 27 concerts across 20 cities. The Latin American, European, Australian and Asian dates were announced in June 2023, visiting 26 cities; popular demand led Swift to increase the number of tour dates in all the continents multiple times. In the end, the Eras Tour became the most expansive tour of Swift's career domestically and globally, with 62 US shows and 90 international shows, for a total of 152 shows.

Some countries that were expected to receive dates for the tour were absent in Swift's announcements in June 2023, drawing dismay and demands from the Swifties and officials in those territories. Billboard reported that politicians and government officials were "clamoring for a glimpse of the Eras Tour".

Gabriel Boric, the 35th president of Chile, wrote to Swift, requesting her to bring the tour to Chile. Members of the Canadian Parliament filed a grievance with the Speaker of the House of Commons, displeased with the Eras Tour "snubbing" Canada. Canadian Prime Minister Justin Trudeau then invited Swift to tour Canada; one month later, Swift announced six shows in Toronto, followed by three shows in Vancouver later that year. William Watson, writing for the Financial Post, opined that the lawmakers from the Liberal Party of Canada, including Trudeau, will attempt to "nationalize" the distribution of the tour's tickets in Canada in an attempt to win over Swift's fans for the 2025 Canadian federal elections.

Unprecedented demand for the Eras Tour tickets were further reported in as Argentina (three million customers), and Canada (31 million) as well. In Brazil, more than 10 scalpers were arrested for trying to resell tickets originally priced at around R$6,000 (US$1,250) at significantly higher prices. Simone Marquetto, a member of the Brazilian Chamber of Deputies for São Paulo, proposed increasing the maximum prison sentence for scalping from one year to four years and fines up to 100 times the price set by scalpers.