Basin City (/ˈbeɪsən ˈsɪtiː/) is an unincorporated community and census-designated place (CDP) in Franklin County, Washington, United States.

The town was established to support the local agricultural community which was being opened to irrigation through the Columbia Basin Project.

The new settlers to the area consisted primarily of young farmers from Idaho and southwestern Oregon and World War II veterans, who received preferential status on the purchase of federal lands that were sold as part of the project.

The land west of the town slopes gradually downward for about 2 miles (3 km) then rises abruptly by about 300 feet (90 m) at Basin Hill.

The tallest peak visible from Basin City is Rattlesnake Mountain, about 25 miles (40 km) to the southwest on the opposite side of the Columbia River.

However, from the top of nearby Basin Hill it is possible to see Mount Rainier, which lies approximately 125 miles (201 km) to the west in the Cascade Range.

According to the United States Census Bureau, the Basin City CDP has a total area of 3.2 square miles (8.3 km2), all of it land.

The Basin City Freedom Rodeo was first staged on July 4, 2020, as a peaceful protest against Washington State's coronavirus lockdown restrictions.