This page summarizes earthquakes in Lewis County (United States). The most recently recorded event was a magnitude M1.6 earthquake near Lewis County on 2026-08-08 22:51:59 UTC. All event lists and map markers are limited to the last 30 days.
Lewis County is a county in the U.S. state of Washington. As of the 2020 census, the county's population was 82,149. The county seat is Chehalis, and its largest city is Centralia.
In 2026, Lewis County recorded 39 earthquakes within United States. The average magnitude was M1.42. The strongest event reached M2.4.
By event count in 2026, this region ranks #67 within United States.
Located on the North America Plate.
