Anna Karenina is a novel by the Russian writer Leo Tolstoy, published in serial installments from 1873 to 1877 in the periodical The Russian Messenger.

Anna Karenina is a married aristocrat and socialite. Her affair with the affluent Count Vronsky is central to the plot. The story starts when she arrives in the midst of a family broken up by her brother's unbridled womanizing—something that prefigures her own later situation, though with less tolerance for her by others.

Widely regarded as a pinnacle in realist fiction, Tolstoy considered Anna Karenina his first true novel, when he came to consider War and Peace to be more than a novel.

Fyodor Dostoevsky declared it to be "flawless as a work of art". His opinion was shared by Vladimir Nabokov, who especially admired "the flawless magic of Tolstoy's style", and by William Faulkner, who described the novel as "the best ever written". The novel is currently enjoying popularity, as demonstrated by a recent poll of 125 contemporary authors by J. Peder Zane, published in 2007 in "The Top Ten" in Time, which declared that Anna Karenina is the "greatest novel ever written".

Recommended to book clubs by 3 of 3 members.