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Endicott is a small town in Whitman County, Washington, in the wheat country of the Palouse.

Endicott was platted in 1882 and named for William Endicott Jr. of the Oregon Improvement Company, the railroad-affiliated firm developing the region.

The town was officially incorporated on February 11, 1905.

Endicott's population peaked at 634 in the 1920 census and has declined almost ever since, a slide the town attributes to farm mechanization letting fewer people farm more land.

Endicott's census history holds a striking quirk: the 2000 census counted 621 residents with a median age of just 23, but the count fell back to 289 in 2010 before rising slightly to 312 in 2020.

At the 2010 census Endicott had 289 people in 141 households, with a median age of 51 — an old, quiet farm town of just 0.29 square miles at about 1,706 feet elevation.

Endicott High School closed in 1987 after its final senior class — the class of 1986 — graduated a single student, and the district merged with neighboring St. John; Endicott's elementary school remains open and the community hosts the two towns' shared middle school.

By 2011, Endicott's once-busy main street was down to a grocery store, a post office and a service station.

Former Washington governor Mike Lowry is listed among Endicott's notable people, as is actress Mariana Klaveno.