Frederick David Ely (September 24, 1838 – August 6, 1921) was a United States representative from Massachusetts.

Frederick D. Ely was born in Wrentham, Massachusetts on September 24, 1838.^[1]

He attended Day’s Academy and graduated from Brown University in 1859. He studied law, was admitted to the bar and commenced practice at Dedham. He was a trial justice, was elected a member of the Massachusetts House of Representatives, and served in the Massachusetts State Senate. He was also a member of the Dedham school committee.

Ely was elected as a Republican to the Forty-ninth Congress (March 4, 1885 – March 3, 1887). He was an unsuccessful candidate for reelection in 1886 to the Fiftieth Congress and resumed the practice of law, and did serve as justice of the Municipal Court of Boston from 1888 to 1914.

He married Eliza Baldwin Whittier on December 6, 1866. She died on February 12, 1881, and he remarried to Anna Emerson on August 10, 1885.^[1]

He died at his home in Dedham on August 6, 1921, and was buried in Old Village Cemetery.^[2]

• 1873 Massachusetts legislature
• 1878 Massachusetts legislature