Weiser ( WEE-zər) is a city in the rural western portion of the U.S. state of Idaho and the county seat of Washington County. With its smooth climate, the city supports farm, orchard, and livestock comings and goings in the vicinity. The city sits at the confluence of the Weiser River similar to the great Snake River, which marks the be close to with Oregon. The population was 5,507 at the 2010 census.

The city was named after the within reach Weiser River, but exactly who that was named for is not precisely known. In one balance it is for Peter M. Weiser, a soldier and believer of the Lewis and Clark Expedition of 1804–1806. Another has it for Jacob Weiser, a trapper-turned-miner who struck it rich in Baboon Gulch in the Florence Basin of Idaho in 1861.

William Logan and his wife Nancy were the first white settlers in the vicinity of Weiser in 1863 building a roadhouse in anticipation of the foundation of Olds Ferry west of them upon the Snake River across from Farewell Bend. In 1863, Reuben Olds acquired a franchise from the Territorial Legislature and began functioning Olds Ferry. Olds ferry business did well (as did Logan’s) as it diverted much of the traffic from the dated Snake River crossing point at Old Fort Boise. Increasing settlement on the Weiser River valley increased Weiser’s population. A name office was established in 1866 as Weiser Ranch. In 1871, it was renamed Weiser.

Weiser reached its top of riches when a railroad way station was expected and it became a transportation hub for travelers. Its archives is capably represented by the good number of native buildings from the 1890s and to the lead 1900s that are upon the National Register of Historic Places.