Killona is a census-designated place (CDP) in St. Charles Parish, Louisiana, United States. The population was 724 in 2020. On December 14, 2022, the town was hit by a destructive and deadly EF2 tornado that damaged or destroyed numerous structures, killed one person, and injured eight others.

Geography Killona is located at (29.999471, -90.487081).

According to the United States Census Bureau, the CDP has a total area of , of which is land and (9.13%) is water.

Demographics

Killona was first listed as a census designated place in the 2000 U.S. census.

+Killona CDP, Louisiana – Racial and ethnic compositionRace / Ethnicity (NH = Non-Hispanic)Pop 2000Pop 2010% 2000% 2010White alone (NH)581157.28%1.39%0.69%Black or African American alone (NH)72877471191.34%97.60%98.20%Native American or Alaska Native alone (NH)0000.00%0.00%0.00%Asian alone (NH)0010.00%0.00%0.14%Native Hawaiian or Pacific Islander alone (NH)0000.00%0.00%0.00%Other race alone (NH)6000.75%0.00%0.00%Mixed race or Multiracial (NH)0660.00%0.76%0.83%Hispanic or Latino (any race)5210.63%0.25%0.14%Total797793724100.00%100.00%100.00% In 2000, Killona's population was 797. By the 2020 census, its population declined to 724.

Education St. Charles Parish Public School System operates public schools: Hahnville High School in Boutte"Hahnville High School" (). AdvancED. p. 4/9. Retrieved on December 3, 2016. "Hahnville High School services all students on the west bank of the Mississippi River in St. Charles Parish, including the communities of Ama, Boutte, Hahnville, Luling, Paradis, Des Allemands and Killona."

Places of interest Killona is home to the following: Killona Plantation — Former plantation that held enslaved Africans, after emancipation Black Americans were held there in 'peonage' until 1970s. Waterford 3 — Operated by Entergy Nuclear, Waterford Nuclear Generating Station (aka Waterford 3), produces roughly 10% of power for the state of Louisiana.

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