Celinda never married.
Found in 1880 Census in Milan, Ohio living with parents at age of 32
1920 Census Milan, Ohio living alone at age 71 on same page as Roy M. (son of her brother Albert)

Obituary taken from "The Firelands Pioneer", Page 786, April 1930:
Fish, Miss Celinda, the last member of the Samuel Fish family was born in Marcellus, N. Y., November 21, 1848 and passed away at her home in East Milan, March 10, 1927 at the age of 78 years, 3 months, and 17 days. When 17 years of age she, with her parents and brother Albert and sisters Dora and Carrie, moved to Milan where she resided for the remainder of her life. The nearest relatives left to mourn her passing were eight nieces and nephews.

Misc news about her funeral:
DELAY RITES OF MILAN WOMAN
Miss Fish, 76, Died in Home Early Thursday
MILAN, March 10 - (Special) - Arrangements for the funeral of Miss Celinda Fish, 76, who died in her home in E. Milan early today will be delayed pending the arrival of relatives from distant points, it was decided today.
Miss Fish, who came to this locality from New York State at the age of 16 years, leaves four nieces and four nephews. She was the last member of her immediate family. She had resided in the same house during her entire residency here.

FISH RITES TODAY
MILAN, March 11 - (Special) - Funeral services for Miss Celinda Fish, 76, who died in her home here Thursday will be conducted in the late home in East Milan at 2 o'clock Saturday afternoon. The Rev. Mr. Dunakin of Sherwood, Ohio will officiate and burial will be in Milan cemetery.