From a total population of 12,733, Petersburg has a median age of 43.2. The average age of males, in Petersburg, is 42.1 while the average age of females is 44.5. When you compare this to median age of Indiana, Petersburg is 6.0 years older.
The median income of individuals, in Petersburg, is $22,974 while the average household income is $43,065. When comparing the median income of people living in Petersburg to the rest of Indiana, the average income in Petersburg is $1,979 less.