 old jefferson is a census-designated place (cdp) in east baton rouge parish, louisiana, usa. the population was 6,980 at the 2010 census, up from 5,631 in 2000. it is part of the baton rouge metropolitan statistical area. ==geography== old jefferson is located at  (30.381292, -91.010376). according to the united states census bureau, the cdp has a total area of 3.5&nbsp;square miles (9.1&nbsp;kmÂ²), all of it land. ==demographics==  as of the census of 2000, there were 5,631 people, 2,044 households, and 1,582 families residing in the cdp. the population density w
Baton_Rouge_metropolitan_area Census-designated_places_in_East_Baton_Rouge_Parish,_Louisiana Census-designated_places_in_Louisiana