Primer Impacto (Spanish for 'First Impact'; Spanish pronunciation: [pɾimeɾ impakto]) is an American Spanish-language tabloid newsmagazine television program that premiered on Univision on February 14, 1994.

The show is well known in Latin America for its tabloid format, and a focus on crime and sensationalistic reporting (including heavy use of caught-on-tape footage and airing of graphic imagery with little to no editing to fit broadcast standards), as well as entertainment news and human-interest stories; however, it also provides a general rundown of the day's headlines, as well as national weather and sports segments. Another particular element of the show has been the show's set, which, even with rebuilds throughout its history, has always had an anchor desk deliberately designed to display the legs of its female anchors, who purportedly wear revealing business casual clothing during the program. Being one of the first and foremost tabloid news shows in Latin America, it receives some of the highest ratings for an American Hispanic TV program worldwide, though it has also been criticized by many viewers and media insiders for its content; such scrutiny has led to the derogatory monikers "Noticiero de las Piernas" ("News with Legs") and "Las Noticias Cochinas" ("The Dirty News") to describe the show.

The program is broadcast live Monday through Friday at 5:00 p.m. Eastern and Pacific Time; weekend editions of the program (under the title Primer Impacto: Fin de Semana; "First Impact: Weekend Edition") were produced from March 2, 1994 until September 2011, when budget cuts at Univision forced the cancellation of its Saturday and Sunday editions (following an aborted attempt to restructure it as a weekday-only broadcast amid budget reductions imposed in 2009). A condensed half-hour late edition of the program, Primer Impacto Extra, aired from January 1998 to September 20, 2019, as a lead-in for the network's 11:30 p.m. ET/PT newscast, Noticiero Univision: Edicion Nocturna; on September 23, 2019, Extra was replaced in the 11:00 p.m. slot by a rebroadcast of the early-evening edition of Noticiero Univision and Sabor de Mañana ("Taste of Tomorrow"), a five-minute filler segment—slotted between both broadcasts of the network's flagship news program—that previews Univision's news and entertainment/lifestyle shows for the next day. (Primer Impacto Extra was preempted by local late-evening newscasts on most of the network's broadcast stations, airing mainly on its national feed and on Univision stations without a local news department.)

The show's main anchors are Michelle Galván and Pamela Silva; Verónica Del Castillo is the show's main Mexico City-based anchor, contributing to reports on Mexican-centered stories, and occasionally serving as a fill-in anchor. Jackie Guerrido is the show's main weather forecaster, and also acts as the main fill-in presenter; both WLTV chief meteorologist Eduardo Rodríguez and Univision meteorologist Paola Elorza substitute for Guerrido in the event the latter is assigned to substitute as co-anchor or is absent. Félix Fernández and Fernando Fiore present the sports segment, produced by the TUDN sports division.