The Journal of Arthur Stirling is a novel by author Upton Sinclair, published in 1903.

It is written in a first-person perspective, with the main fictional character being Arthur Stirling.

The novel begins with an introduction by a character who calls himself, "S."; Stirling already dead by suicide, sends S. a copy of the journal, as well as The Captive for him to read.

Sinclair planted an obituary for Stirling in The New York Times "to raise a sensation", but was widely criticized by journalists and editors for the hoax.

A reviewer in The Athenaeum wrote: ... if the young man really lived, and, above all, died, as described by this book, then the critic is to a great extent disarmed.