Salamonia is a town in Madison Township, Jay County, Indiana, United States.

The town is situated along the Salamonie River, near its headwaters in Northern Indiana.

When the first post office was established there, it was discovered there was another Lancaster, Indiana, and the town was renamed Salamonia, in order to avoid repetition.

[7] According to the 2010 census, Salamonia has a total area of 0.37 square miles (0.96 km2), all land.

The racial makeup of the town was 98.7% White, 0.6% Native American, and 0.6% from two or more races.

About 16.2% of families and 16.1% of the population were below the poverty line, including 28.8% of those under the age of eighteen and 66.7% of those 65 or over.