Yznaga is a census-designated place (CDP) in Cameron County, Texas, United States.

Yznaga is located near the northwest corner of Cameron County at 26°18′45″N 97°49′4″W / 26.31250°N 97.81778°W / 26.31250; -97.81778 (26.312616, -97.817895).

14.7% of all households were made up of individuals, and 8.8% had someone living alone who was 65 years of age or older.

The Lyford Consolidated Independent School District serves the majority of the Yznaga CDP.

A portion of the CDP is in the Santa Rosa Independent School District.