National Register of Historic Places listings in King County, Washington

This is a list of the National Register of Historic Places listings in King County, Washington.

This is intended to be a complete list of the properties and districts on the National Register of Historic Places in King County, Washington, United States. Latitude and longitude coordinates are provided for many National Register properties and districts; these locations may be seen together in an online map.

There are 281 properties and districts listed on the National Register in the county. Most of these listings are located in the city of Seattle, and are listed separately; the remaining 87 properties and districts are listed here. Another property in the county outside of Seattle was once listed on the National Register but has been removed.