Lewiston is located in Trinity county California with a geographic area of 20.0 square miles. The total population in Lewiston is 1,481 with 43.6% male and 56.4% female. Children under age 5 represent 6.8% of the population, under age 18 equal 18.1% of the population and over age 65 is 23.2% of the population. The median household income is $49,818, per capita income is $24,882. There are a total of 603 housing units with 73.0% owner occupied. Education includes 42.1% of residents that are high school graduates and 12.4% with a bachelor's degree or higher. The average temperature in Lewiston in the summer is 76 degrees, and in the winter 43 degrees.
