Fire crews responded to a home in the 1400 block of Odin Lane at 5 p.m. after neighbors "noticed smoke billowing from the windows," according to the Poulsbo Fire Department.
The neighbors, two 19-year-old men, ran over to the house, broke down the back door and attempted to extinguish the fire using a garden hose.
The neighbors were able to contain the fire to the home's kitchen, and firefighters completely extinguished the blaze within 5 minutes of arriving at the house.
A 90-year-old man who lived at the house was home at the time and did not survive the fire. The victim has not been identified, but neighbors described him as a "wonderful man and a well-known local musician," according to the Poulsbo Fire Department.
The fire appears to have started in the kitchen, but the Kitsap County Fire Marshall has yet to determine how it started. The Kitsap County Coroner will determine the resident's cause of death.