The 2015 Seattle minimum wage is $11/hr if you work for a company or chain with more than 500 employees nationally. The wages are going up again on January 1, 2016 and every year after that. The first workers get to $15/hour in 2017, and everyone gets there in the next few years afterwards.
Are you not getting the amount you should be? Let us know if something seems off about your paycheck by clicking this link here.