Primer Impacto (First Impact) is a Spanish-language television news program broadcast by Univision weekdays at 5pm ET//4pm CT. A later program at 11pm ET/PT (Primer Impacto Extra) airs on Univision affiliates without a local news department (and the national cable feed), leading into the network's 11:30pm newscast, Noticiero Univision Edicion Nocturna.

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 filling in. Jackie Guerrido is the show's main weather forecaster on weekdays, and also acts as the main fill-in presenter. Univision meteorologist Paola Elorza does the weather on weekends. Both WLTV chief meteorologist Eduardo Rodríguez and Elorza substitute for Guerrido in the case she's sitting in the anchor desk or absent. Félix Fernández and Fernando Fiore present the sports segment, produced by the TUDN sports division.

The show is well known in Latin America for its tabloid format, and a focus on crime and sensationalistic reporting (including broadcasting graphic imagery with little to no censorship), as well as entertainment news and human-interest stories. 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 which deliberately exposes the legs of its anchors, who use revealing clothing purportedly. Being one of the first and foremost tabloid television shows in Latin America, it receives some of the highest ratings for an American Hispanic TV program worldwide, and it has also being criticized by many viewers and media insiders for its content. Such controversy has led to the derogatory monikers "Noticiero de las Piernas" and "Las Noticias Cochinas".