Head injuries account for more than 60% of bicycle-related deaths and more than two-thirds of bicycle-related hospital admissions. Fortunately, a high percentage of cyclists’ brain injuries can be prevented by a helmet, estimated at anywhere from 45% to 88%. Helmets are designed to protect your brain, and they do a good job when worn and adjusted properly. For this reason, helmets are required by law throughout King County, Pierce County and many other local jurisdictions. Check the table below, or contact your jurisdiction for local helmet regulations. 

          Where are helmets required?
Washington state   Varies by county and city

KC Title 9.10.010

BCC 11.60.090
King County

KC Title 9.10.010

Snohomish County   Varies by city
Pierce County
PCC 10.22.020