According to the United States Census Bureau, the CDP covers an area of 4.0 square miles (10.4 km2), all of it land.

The 2010 United States Census[4] reported that Trinity Village had a population of 297.

44 households (32.1%) were made up of individuals, and 16 (11.7%) had someone living alone who was 65 years of age or older.

There were 274 housing units at an average density of 68.3 per square mile (26.4/km2), of which 108 (78.8%) were owner-occupied, and 29 (21.2%) were occupied by renters.

[6] Federally, Trinity Village is in California's 2nd congressional district, represented by Democrat Jared Huffman.