text: According to the United States Census Bureau, the city has a total area of , of which  is land and  is water.
  Post Falls is located on the Rathdrum Prairie, along the Washington–Idaho border. 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. Post Falls is  east of Spokane and approximately  south of the Canada–United States border. The elevation of the city is  above sea level.
  Climate
  Post Falls has a Warm-summer mediterranean climate (Csb), with four very distinct seasons.
  Education
  The public schools are run by the Post Falls School District #273. Other schools within Post Falls include:
  Classical Christian Academy
  Frederick Post Kindergarten
  Greensferry Elementary
  Genesis Prep Academy
  Mullan Trail Elementary
  Ponderosa Elementary
  Prairie View Elementary
  Seltice Elementary
  Treaty Rock Elementary
  West Ridge Elementary
  Post Falls Middle School
  Immaculate Conception Academy
  River City Middle School
  Post Falls High School
  New Vision Alternative High School
  North Idaho College Workforce Training Center
  St. Dominic School
  Pinegrove Academy
  Demographics
  As of 2022 the per capita income for the city was $71,042.
  2020 census
  As of the census of 2020, there were 38,485 people and 14,430 households residing in the city.