Luis Donaldo Colosio Riojas (born 31 July 1985) is a Mexican lawyer and politician who serves as a senator from Nuevo León.

When Colosio was eight years old, he and his sister became orphans after their father was assassinated at a campaign rally in Tijuana in 1994, followed by their mother's death from pancreatic cancer eight months later.

The siblings were then adopted by their maternal aunt and uncle, Hilda Elisa Riojas and Fernando Cantú, and moved to Monterrey, Nuevo León.

[1] Colosio attended the Mexico City campus of the Monterrey Institute of Technology and Higher Education, where he earned a Bachelor of Laws in 2010.

[3] In January 2018, Samuel García, the then coordinator of Citizens' Movement in Nuevo León, introduced Colosio as a candidate for a popularly elected office, either at the federal or state level.

[6] On 15 November 2020, Citizens' Movement announced that Senator Samuel García and Colosio were seeking the party's gubernatorial nomination.

[10] However, his approval rating dropped by 23 points in 2023, largely due to the slow pace of construction projects and a perceived rise in crime, becoming the lowest-rated mayor in the Monterrey metropolitan area.

[14] Colosio launched the Corredores Verdes (in English: Green corridors) initiative to make Monterrey more walkable by expanding sidewalks, improving crosswalks, adding bike lanes, and planting trees along key downtown avenues.

[24] Between 2022 and 2023, the Monterrey government repaved about 729 thousand cubic meters of pavement throughout the municipality, covering eight of the city's major avenues and streets in 46 different neighborhoods.