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As of the 2010 United States Census, Gretna, located in the Pelican State, had a total population of 16,399 people.
From a total population of 16,399, Gretna has a median age of 36.2. The average age of males, in Gretna, is 36.2 while the average age of females is 36.3. When you compare this to median age of Louisiana, Gretna is 0.2 years older.
The median income of individuals, in Gretna, is $22,788 while the average household income is $34,158. When comparing the median income of people living in Gretna to the rest of Louisiana, the average income in Gretna is $1,987 less.