Univision, already entrenched as America’s fifth most popular broadcast network, shot up to No. 1 among younger viewers earlier this week.

On Tuesday, a night when typically top-rated CBS aired repeats, the Spanish-language network ranked first among adults 18-49, squeaking past ABC (2.39 million to 2.38 million) to rule all of television in the demo, according to Nielsen data released Thursday.

The network has tapped into population trends that have resulted in Latinos accounting for one in four people in America under 18, according to the 2010 Census. On Tuesday, for example, Univision led primetime by a wider margin among persons 12-34 — drawing 1.44 million to 1.27 million for Fox.

Univision notes that it has now been the No. 1 broadcaster in adults 18-49 on 13 nights this season.

Tuesday’s top programs on the network were novelas “Amores Verdaderos” (True Love), which scored a 2.2/6 in adults 18-49 (roughly 2.8 million viewers in the demo) and “Por Ella Soy Eva” (For Her I’m Eva), which did a 1.9/5 (roughly 2.4 million).

“Verdaderos” edged out Fox’s “New Girl” as TV’s top dog for the night in 18-49.