Cambridge is a city in Washington County, Idaho, United States.

[5] Cambridge has a hot-summer mediterranean continental climate (Köppen climate classification Dsa), 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 (−4.8 °C), and lows falling to 0 °F (−18 °C) or below on 9.6 nights per year.

The racial makeup of the city was 98.2% White, 0.6% Native American, and 1.2% from two or more races.

33.1% of all households were made up of individuals, and 14.5% had someone living alone who was 65 years of age or older.

The city is served by U.S. Highway 95, connecting to Council and New Meadows to the north and Weiser and Payette to the south.

State Highway 71 heads northwest from Cambridge to the Brownlee Dam on the Snake River.

[12] Washington County is in the area (but not the taxing region) of the College of Western Idaho, which has its main campus in Nampa.