[2] The 2010 United States census reported Sierra Brooks's population was 478.

According to the United States Census Bureau, the CDP covers an area of 1.4 square miles (3.5 km2), all of it land.

The 2010 United States Census[4] reported that Sierra Brooks had a population of 478.

There were 211 housing units at an average density of 154.0 per square mile (59.5/km2), of which 153 (82.3%) were owner-occupied, and 33 (17.7%) were occupied by renters.

[6] Federally, Sierra Brooks is in California's 1st congressional district, represented by Republican Doug LaMalfa.