Azalia is an unincorporated community in Monroe County in the U.S. state of Michigan.

As an unincorporated community, Azalia has no legally defined boundaries or population statistics of its own but does have its own post office with the 48110 ZIP Code.

A post office opened on August 4, 1869[5][6] (or in 1866 by some accounts),[7] largely through the efforts of Daniel T. Hazen, to avoid having to travel to West Milan (now Cone) to pick up mail.

Steven Frink was the first postmaster, followed by Hazen in 1867, Joseph Meadows in 1872, John M. Lewis in 1877, and A.C. Reynolds in 1884.

[7] The Toledo, Ann Arbor and Grand Trunk Railway (later the Toledo, Ann Arbor and North Michigan Railway and then the Ann Arbor Railroad), opened on June 8, 1878, with a station named "Azalia", named after one of the daughters of the president of the railroad, Azalia Ashley.