Is there a bicycle helmet law in Seattle, King County or Washington State?
A:
Is there a bicycle helmet law in Seattle, King County or Washington State?
Helmets are required for bicyclists in all of King County (including the City of Seattle). The violation is a civil infraction (ticket) and the base fine is $30. There are additional court costs of $51 added to the base fine amount, so the total is $81. All law enforcement officers have the authority to enforce this code -- police officers, sheriff's deputies, state patrol troopers, etc.