Check out https://www.alz.org/ for senior services for families dealing with Alzheimer's Disease.
King County Senior Services can be found at https://www.kccaregiver.org/ for seniors in Shoreline, Bellevue, and Seattle
Snohomish County Senior services can be found at https://www.homage.org/
Senior Citizen Veterans and their spouses may be eligible for benefits through a resource called Veteran's Aid and Attendance. Information for these senior services can be found at https://www.va.gov/pension/aid-attendance-housebound/
The NW LGBT Senior Care Providers Network, https://nwlgbtseniorcare.org/, offers a resource for senior citizens in these communities in the Shoreline, Bellevue and Seattle areas.