Demographic analysis of the 2016 flood in East Baton Rouge Parish – 17 months later

In August 2016, much of south Louisiana faced massive flooding. In its aftermath, JMC analyzed changes in voter registration both statewide and in East Baton Rouge Parish (voter registration counts were used as a proxy for population change, since recent Census estimates are not yet available) to assess whether the flood’s demographic impact was as substantial as Hurricane Katrina was both in the short and long term in the New Orleans area.

Now that nearly a year and a half has elapsed, it’s time to revisit that analysis for East Baton Rouge Parish, because the last time this analysis was done, it was determined that the parish grew more slowly than the state as a whole.

Aggregate analysis

At the aggregate level, voter registration statistics from the Secretary of State show that the rate of growth in East Baton Rouge Parish since August 2016 is less than the state as a whole – East Baton Rouge Parish only saw an increase of 228 voters (a 0.1% increase), while the state as a whole gained 29,257 voters (a 1.0% increase).

From a racial perspective, white out migration has been a continuous occurrence in East Baton Rouge Parish, although since the flood, black voter registration has not increased either, and white out migration has slowed down. Furthermore, the biggest change in voter registration (which was only somewhat affected by the flood) was among those who do not racially classify as white or black. More specifically, white voter registration decreased by 660 (or 0.4%), while black voter registration only increased by 56 (a 0.0% change), and “others” increased by 832 (a 6.2% change).

To put these changes in perspective, from August 2010-August 2016 (i.e., the six years preceding the flood), white voter registration decreased 1,676 (or 1.1%), while black voter registration increased 12,455 (or 11.2%), and “Other” registration increased 1,550 (or 13.0%).

Overall, East Baton Rouge Parish has gone from 272,279 registered voters (August 2010) to 284,608 (August 2016) to 284,836 (January 2018). The racial breakdown of its voters was 55-41% (4% “Other”) in August 2010, 52-44% (4% “Other”) in August 2016, and 51-44% (5% “Other”) in January 2018.

East Baton Rouge regional analysis

East Baton Rouge Parish regions










Parish wide, East Baton Rouge Parish’s growth (using voter registration statistics as a proxy for both Census estimates and Census figures) has considerably slowed since the flood. This is also true at the neighborhood/regional level, although (in relative terms) both “South Baton Rouge” (areas south of I-10/west of Airline Highway) and Zachary grew the fastest. Conversely, the “Sherwood Forest” area (neighborhoods east of Airline Highway and between I-12 and Florida Boulevard) saw the steepest decline in its voter population since the flood. There is some (but not a perfect) correlation to the August 2016 flood: South Baton Rouge generally saw minimal flooding, while many parts of Sherwood Forest flooded, as did broad swaths of territory in the southeastern portion of the parish (which for the first time saw a decrease in its voter population since the flood). On the other hand, Zachary continued to grow, despite some flooding that occurred in that part of the parish.

While white out migration has been occurring for years in East Baton Rouge Parish, that ironically has slowed down since the flood, except in Sherwood Forest, which actually saw an accelerated decline of over 7% in its white voter population since the flood (compared to a 5% decrease between August 2014-August 2016).

What was newsworthy is that black voter registration growth has slowed down to a trickle since the flood, particularly in Central, Sherwood Forest, and the southeastern portion of the parish (all of which saw a substantial amount of flooding): black voter registration increased 33% in these areas between 2010-2016; since then, black voter population increased only 1.1%.

East Baton Rouge Parish overall voter registration changes





East Baton Rouge Parish white voter registration changes





East Baton Rouge Parish black voter registration changes





East Baton Rouge Parish other voter registration changes






In the 17 months since the flooding, East Baton Rouge has seen a slowdown in growth from a voter registration perspective, and that slowdown was somewhat (but not entirely) a function of flood damage. What has been newsworthy is that this slowdown for the first time crosses racial lines.