Jaak Nanilson (1880 – 16 August 1924 near Abja, Viljandi County) was an Estonian politician.
He was a member of II Riigikogu.
He was a member of the Riigikogu since 22 March 1924.
On 19 August 1924, he resigned his position and he was replaced by Boris Kumm.
This article about an Estonian politician is a stub.