Sierra city is located in Sierra county California with a geographic area of 2.2 square miles. The total population in Sierra city is 84 with 48.8% male and 51.2% female. Children under age 5 represent 0.0% of the population, under age 18 equal 0.0% of the population and over age 65 is 88.1% of the population. The median household income is $96,406, per capita income is $54,961. There are a total of 45 housing units with 100.0% owner occupied. Education includes 22.2% of residents that are high school graduates and 60.0% with a bachelor's degree or higher. The average temperature in Sierra city in the summer is 76 degrees, and in the winter 43 degrees.