Jacob Garber Neff (December 2, 1840 – January 28, 1925) was an American politician who served in the Virginia House of Delegates.

[2] Neff was nominated as the Democratic candidate to represent Shenandoah County in the 1881 Virginia House of Delegates election.

[2]He lost the election to George J. Grandstaff, the Readjuster candidate, with 1165 votes compared to his opponent's 1492.

[8] The incumbent Delegate, Philip W. Magruder, had previously turned down the nomination for a fourth term.

[10] He was elected with 1550 votes, being 336 more than his closest opponent, Republican candidate Daniel Spiker.