Lafayette is located in Yamhill county Oregon with a geographic area of 0.9 square miles. The total population in Lafayette is 4,222 with 51.5% male and 48.5% female. Children under age 5 represent 5.3% of the population, under age 18 equal 24.2% of the population and over age 65 is 7.9% of the population. The median household income is $77,662, per capita income is $28,054. There are a total of 1,377 housing units with 86.1% owner occupied. Education includes 20.6% of residents that are high school graduates and 23.5% with a bachelor's degree or higher. The average temperature in Lafayette in the summer is 65 degrees, and in the winter 35 degrees.