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 increasingly transforming itself from a country town to an affluent suburb of Baton Rouge. Land prices in Zachary have increased dramatically in recent years because of this, and, as of 2006, the displacement caused by Hurricane Katrina is expected to intensify this even more as former residents of New Orleans neighborhoods move northward. However, the U.S. Census Bureau released a population count for East Baton Rouge Parish, done in July 2006 but released in Mach 2007 which includes Baker, Louisiana and Zachary and found that only 19,264 displaced citizens remain in East Baton Rouge Parish which dismisses all claims about Zachary's "intensifying" growth with only a small portion of displaced citizens remaining and many still consider themselves "temporary" as they wait for federal recovery cash to return to their homes in the New Orleans metropolitan area or other Gulf Coast regions. While the study dismissed claims of Zachary's intensifying growth as a result of displaced citizens of Hurricane Katrina, Zachary is continually adding an enormous amount of residents due to having the Number 1 ranked school System in Louisiana for 3 consecutive years.
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.
The Zachary school district became independent from the East Baton Rouge Parish school district in 2004, and immediately received the highest standardized test scores in the state of Louisiana.
Zachary was the first city in Louisiana to elect a Republican as mayor in 20th-century Louisiana. Jack Louis Breaux, Sr., served as a part-time mayor from 1966-1978, and a full-time mayor under a home-rule charter from 1978 until his death of a brain tumor on January 26, 1980.
According to the United States Census Bureau, the city has a total area of 23.8 square miles (61.5 km²), of which, 23.7 square miles (61.5 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.13%) is water.
There were 3,836 households out of which 43.4% had children under the age of 18 living with them, 60.2% were married couples living together, 15.6% had a female householder with no husband present, and 20.1% were non-families. 17.5% of all households were made up of individuals and 7.4% had someone living alone who was 65 years of age or older. The average household size was 2.88 and the average family size was 3.26.
The population was spread out across age groups with 30.0% under 18, 8.8% from 18 to 24, 29.5% from 25 to 44, 20.8% from 45 to 64, and 10.8% who were 65 or older. The median age was 34 years. For every 100 females there were 90.5 males. For every 100 females age 18 and over, there were 86.7 males in the same age range.
The median income for a household in the city was $49,669, and the median income for a family was $57,389. Males had a median income of $45,092 versus $25,143 for females. The per capita income for the city was $18,554. About 6.9% of families and 9.1% of the population were below the poverty line, including 12.6% of those under age 18 and 7.9% of those age 65 or over.