0001401564 2022-10-27 2022-10-27 false 0001401564 8-K 2022-10-27 First Financial Northwest, Inc. WA 001-33652 26-0610707 201 Wells Avenue South Renton WA 98057 425 255-4400 false false false false Common Stock, par value $0.01 per share FFNW NASDAQ false