According to the United States Census Bureau, the CDP has a total area of 8.5 square miles (22.0 km²), all of it land.
As of the census of 2000, there were 575 people, 263 households, and 173 families residing in the CDP. The population density was 67.8 people per square mile (26.1/km²). There were 311 housing units at an average density of 36.6/sq mi (14.1/km²). The racial makeup of the CDP was 94.26% White, 0.17% African American, 3.13% Native American, 0.17% Asian, 0.70% from other races, and 1.57% from two or more races. Hispanic or Latino of any race were 4.17% of the population.
There were 263 households out of which 25.9% had children under the age of 18 living with them, 55.5% were married couples living together, 6.8% had a female householder with no husband present, and 34.2% were non-families. 28.1% of all households were made up of individuals and 10.3% had someone living alone who was 65 years of age or older. The average household size was 2.19 and the average family size was 2.66.
In the CDP the population was spread out with 21.2% under the age of 18, 5.0% from 18 to 24, 25.4% from 25 to 44, 33.4% from 45 to 64, and 15.0% who were 65 years of age or older. The median age was 44 years. For every 100 females there were 113.0 males. For every 100 females age 18 and over, there were 106.8 males.
The median income for a household in the CDP was $33,571, and the median income for a family was $45,469. Males had a median income of $40,000 versus $30,667 for females. The per capita income for the CDP was $19,726. About 10.6% of families and 11.5% of the population were below the poverty line, including 9.8% of those under age 18 and 9.0% of those age 65 or over.
The primary local news source is the Feather River Bulletin, a newspaper published every Wednesday.
In the state legislature Meadow Valley is located in the 1st Senate District, represented by Republican Dave Cox, and in the 3rd Assembly District, represented by Republican Rick Keene. Federally, Meadow Valley is located in California's 4th congressional district, which has a Cook PVI of R +11 and is represented by Republican John Doolittle.