Population Change by CD and by County

With the Census Bureau having completed its gradual rollout of data from all the states last week, I’ve finally gotten around to assembling data from all the various congressional districts into one place. While the actual population gain or loss in each district isn’t as important a number, for SSP purposes, as the number of people each district will need to shed or gain as part of the redistricting process (which you can see in the various posts we did as each state’s data came out), the overall gain and loss is an important part in the overall picture of where people are moving to and from (and where they’re being born). Just the numbers of people moving in or out isn’t as helpful as knowing who exactly these people are, and we’ll delve a little more deeply into the changing racial compositions of the CDs in the next day or two… but for now, here are the overall population change numbers.

You’re probably noticing, “Wow, that’s a lot of Republican districts.” That’s certainly true, but these are also districts that (as we’ll see when we talk about changing racial composition), for the most part, aren’t becoming more Republican; people tend to bring their values with them rather than undergoing some magical David Brooksian conversion experience once they move in from the city, the inner-ring suburbs, or another country. Some of these districts are ones where much of the gains are Hispanic (like NV-03 or TX-10, or just about any California district on the list); in the case of GA-07, it’s becoming more African-American. That isn’t to say that these are all on the verge of becoming blue, of course; with much of these districts’ non-white populations under 18, it’ll be a gradual process. And redistricting is likely to de-diversify at least some of these districts, with some of the closer-in suburban portions of these districts (note that many of these districts are the ones right on the cusp of suburb and exurb) to be given to lower-population urban districts that need to expand outward, with the remaining parts of the districts staying red. (GA-07, again, is a case in point; the innermost parts of Gwinnett County, which are pretty diverse today, probably will need to get added on to underpopulated GA-05, leaving the rest of the district in very Republican-friendly condition.)

You may recall I did this same thing a year and a half ago when the 2008 estimates came out; there’s been very little change to the list since then, although with some swapping of places. Despite its position at the absolute epicenter of the housing bubble, NV-03 moved up from 4th to 1st place, past the two Arizona districts and TX-10. Districts that fell out of the top 25 in 2008 include GA-06, TX-03, CO-06, FL-25, IL-14, and FL-06, replaced by VA-10, FL-12, TX-28, TX-23, TX-04, and ID-01.

Now, let’s switch over to counties. Counties are a unit of analysis that don’t get talked about at SSP as much as congressional districts, despite the fact that they’re more useful for talking about historical trends because their boundaries (almost) never change over the decades; the rationale, I suppose, is that much of the nation’s population lives in huge counties that contain multiple (or in the case of Los Angeles County, more than a dozen) CDs, so in many cases it’s not as granular a sort (and conversely, counties turn into too-granular a sort if you’re interested in, say, Kansas or west Texas).

Still, looking at which counties gained the most population in raw numbers, it provides an interesting counterpoint to the biggest-gaining CDs. While you’d get the impression of impending utter Republican dominance by looking at the party IDs of which CDs have excess population to shed, looking at the nation’s largest counties shows that, when you balance out the parts and pieces that make up the various CDs, many of the counties have very swingy results at the presidential level. I was also planning to look at changes in racial composition by county as well as by CD in the coming days, so it’ll also become quite evident (if you hadn’t already mentally extrapolated from which CDs are in which counties) that much of the growth coming in these fastest-growing counties is coming from non-whites.