The gens Atia, sometimes written Attia, was a plebeian family at Rome. The first of the gens to achieve prominence was Lucius Atius, a military tribune in 178 BC. Several of the Atii served in the Civil War between Caesar and Pompeius. The gens Attia may be identical with this family, although the individuals known by that name lived nearly a century after the more notable Atii, and are not known to have been related.