The following properties and districts in King County, Washington, United States, are on the National Register of Historic Places. 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 314 properties and districts listed on the National Register in the county. 221 of these listings are located in the city of Seattle, and are listed separately; the remaining 93 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.
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