Yamhill is located in Yamhill county Oregon with a geographic area of 0.5 square miles. The total population in Yamhill is 1,336 with 51.0% male and 49.0% female. Children under age 5 represent 6.6% of the population, under age 18 equal 29.9% of the population and over age 65 is 7.4% of the population. The median household income is $96,250, per capita income is $31,577. There are a total of 398 housing units with 80.2% owner occupied. Education includes 25.4% of residents that are high school graduates and 15.1% with a bachelor's degree or higher. The average temperature in Yamhill in the summer is 68 degrees, and in the winter 35 degrees.