It is a common-interest development managed by the Hidden Valley Lake Association (HVLA).

In October 2014, The State Water Resources Control Board ordered the Hidden Valley Lake Community Services District to stop allowing new service connections to its water system due to concerns that, under current drought conditions, the district did not have enough water to meet future demands.

The 2010 United States Census[5] reported that Hidden Valley Lake had a population of 5,579.

The racial makeup of Hidden Valley Lake was 4,830 (86.6%) White, 63 (1.1%) African American, 80 (1.4%) Native American, 75 (1.3%) Asian, 12 (0.2%) Pacific Islander, 326 (5.8%) from other races, and 193 (3.5%) from two or more races.

388 households (18.3%) were made up of individuals, and 138 (6.5%) had someone living alone who was 65 years of age or older.

There were 2,597 housing units at an average density of 262.7 per square mile (101.4/km2), of which 1,687 (79.6%) were owner-occupied, and 432 (20.4%) were occupied by renters.

16.5% of all households were made up of individuals, and 6.9% had someone living alone who was 65 years of age or older.

In the California State Legislature, Hidden Valley Lake is in the 2nd Senate District, represented by Democrat Mike McGuire, and in the 4th Assembly District, represented by Democrat Cecilia Aguiar-Curry.

Hidden Valley Lake Association), as a CID or Homeowners Association, is a non-profit corporation under California law and is covered by the California Corporations Code and the Davis-Stirling Act.