Question: how to apply for disability benefits in washington state?
Answer: Telephone: An individual can apply over the phone by calling the SSA's toll-free customer service line at 1-800-772-1213 (TTY 1-800-325-0778).
In-person: An individual can apply in-person at your local Social Security field office. Find your local office here.
Online: An individual can apply online at ssa.gov.