Zachary is a city in East Baton Rouge Parish, Louisiana, United States, in the Baton Rouge Metropolitan Statistical Area. The population was 11,275 at the 2000 census.
As the population of East Baton Rouge Parish grows, Zachary is changing from a small country town to an affluent suburb of Baton Rouge. Much of Zachary's growth may be attributed to its ranking by the Louisiana Board of Elementary and Secondary Education as the top school district in the state every year since 2005.
Zachary was named after a farmer who owned the land that became the present city of Zachary. Zachary's first post office opened in 1885, and it was incorporated as a city in 1889. The first census in 1914 reported just 419 residents. By 1980, there were 7,525 residents, in 2000 there were 11,275 residents.