Nada's post office was established in 1894 when William J. Engbrock, Jr., became the first postmaster, and it initially operated in the general store owned by his father, William Engbrock, Sr., until 1898. Over the years, its location changed several times according to the professions and businesses of succeeding postmasters. It was twice housed in the medical office and pharmacy of Dr. Francis Daehne, appointed in 1898, and Dr. John A. Halamicek, appointed in 1915. It returned to the general store during the terms of Joseph H. Labay, named in 1900, and Joseph J. Patter (Potter), appointed in 1903. Adolph Hruzek, who became postmaster in 1911, moved it to his general store across the street. Antone Lichnovsky, appointed in 1921, moved it in 1935 to his general store near the newly constructed State Highway 71, and his daughter, Mary Braden, appointed in 1946, also served from his store. In 1953 the post office moved to the postmaster's new service station and garage, where it remained for thirty years. In 1987 a new post office facility was built on land purchased from the Braden family. Clerks included Rose Staff in 1950, Florence Genz in 1955, and Betty Leopold in 1991. Postmasters included Mary Braden in 1946, Albert Leopold in 1950, Nancy Teasdale in 1985, Sandra Frnka in 1987 and 1995, and Madelienne Pavlu in 1993.