Cambridge is a city in Washington County, Idaho, United States. The population was 328 at the 2010 census, down from 360 in 2000. It is the second largest city in the county, behind the significantly larger Weiser, the county seat.
Cambridge is located at 44°34′18″N 116°40′41″W (44.571535, −116.678013), at an elevation of 2,661 feet above sea level. According to the United States Census Bureau, the city has a total area of 0.49 square miles, of which, 0.48 square miles is land and 0.01 square miles is water.
Cambridge has a dry-summer continental climate, with cold, moist winters, gradual springs, hot and dry summers, and brief autumns. January is the coldest month, with a daily average of 23.3 °F, and lows falling to 0 °F or below on 9.6 nights per year. Snowfall averages 33 inches per season. Precipitation is usually infrequent and light, especially so during the summer months.