Post Falls is a city in Kootenai County, Idaho, United States.

It is the gateway city to Northern Idaho off Interstate 90, just west of Coeur d'Alene, and east of Spokane, Washington.

Post Falls is named after Frederick Post, a German immigrant who constructed a lumber mill along the Spokane River in 1871 on land he purchased from Andrew Seltice, Chief of the Coeur d'Alene Tribe.

The purchase of the land is preserved in a pictograph on a granite cliff in Treaty Rock Park.

It is bounded by Coeur d’Alene to the east, Stateline and the state of Washington to the west, and the Spokane River to the south.

[9] Post Falls has a Warm-summer mediterranean climate (Csb), with four very distinct seasons.

Due to the proximity of numerous lakes, rivers and mountains, Post Falls has developed tourism[14] and retirement communities.

Jobs Plus, Inc., the local economic development organization has recruited several small to medium-sized firms to the county.

Post Falls was the chosen location for Flexcel, Inc., a major furniture manufacturer that relocated to North Idaho nearly fifteen years ago and employs a workforce of 350.

Considerable economic development activity transpired in Post Falls in 2009 including the opening of ALK Source Materials/Biopol which is a Danish pharmaceutical company, a second Super Wal-Mart store that will be located near the new Cabela's store began its construction and is slated to open in early summer 2010, and Lowe's Home Improvement finalized the purchase of land adjacent to the new Wal-Mart at the Pointe at Post Falls.

Ground Force Manufacturing, a large construction equipment manufacturer, completed an addition that increased their production space by 20,000 square feet (1,900 m2) in 2009 in order to meet the heavy demands for their mining construction products around the globe.

In 2010, additional commercial real estate activity is anticipated including the construction of the Lowe's Home Improvement store mentioned earlier; a new 30,000 professional office building to house a company named Ednetics; a 30,000 LEED certified industrial building to be the home of a subsidiary of Berg Integrated Systems will begin construction in early 2010; the Idaho Department of Labor will construct their new regional office here in Post Falls that will provide services to the northern five counties of Idaho; several restaurants are also anticipated to locate within the Pointe at Post Falls regional power center to take advantage of the retail traffic of Cabela's and Wal-Mart; the City's downtown area is expected to see a major mixed-use project also take off with infrastructure and the first phase including a hospitality component begin construction; and finally the community anticipates that construction on the Beck Road Interchange with Interstate 90 will begin this fall ultimately providing service to the Pointe at Post Falls and EXPO on the north side of the freeway and the Riverbend Commerce Park and Greyhound Event Center on the south side of Interstate 90.

Post Falls is approximately 7 miles (11 km) west of U.S. Route 95, the state's primary north–south highway, which extends into Canada.