Louisiana has a humid subtropical climate (Koppen climate classification Cfa), perhaps the most "classic" example of a humid subtropical climate of all the Southcentral states, with long, hot, humid summers and short, mild winters.

Louisiana has a unique linguistic culture, owing to its French and Spanish heritage. According to the 2000 census, among persons five years old and older, [64] 90.8% of Louisiana residents speak only English (99% total speak English) and 4.7% speak French at home (7% total speak French).

The United States dollar, denoted by USD or the symbol $, is the official currency used in the United States. Commonly referred to as the "American dollar, " the currency is divided into 100 cents (symbol ).

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Louisiana ranked 24th in population in the US with an estimated total of 4, 482, 646 in 2002, an increase of 48% since 2000. Between 1990 and 2000, Louisiana's population grew from 4, 219, 973 to 4, 468, 976, an increase of 5.9%.

Baton Rouge is the capital of and second-largest city in Louisiana, United States. It is located in East Baton Rouge Parish.