If we are talking about movements of people between California and Idaho, we can throw in Utah as well, then there is one church that has traditionally been very strong in those three states (and much of the west). I mean, what other church is so strong in SoCal that it owns a bunch of land (enough for a few sports fields) in LA Westwood near UCLA?
If Mormons are leaving SoCal for Idaho or Utah, that wouldn’t be very surprising at all.
72% moved elsewhere in the Bay area
~20% moved elsewhere in California
The next most popular destination was Washington state, the majority going to Seattle.
Source: https://www.sfchronicle.com/local/article/Only-one-U-S-city-...
"between 2019 and 2020, the number of households leaving skyrocketed by more than 77%, or roughly 35,000 households — from 45,263 in 2019 to 80,371 in 2020."
"But while many city residents left for the outer Bay Area counties, the region also lost population during the pandemic, according to the postal service data. In March to November of 2019, nearly 61,000 more change of address requests were made out of the nine counties than into them. In the same period in 2020, 111,350 more requests were made out of the nine counties than into them."
CA's major cities are losing pop and CA lost a House seat.
As I've been chatting with some people at church* I was told that about 1/3 of the people that attend have moved to our little town in Idaho from Southern California in the past 2 years or so. That might not seem like much, but considering that this is small town in the middle of Idaho it seemed like a pretty big deal to me. It's especially interesting to see many people who have more traditional jobs, often revolving around construction or the cultivation of potatoes interacting with many of the white collar, MBA type Cali expats.
* Note: The church I attend is a world wide church and divides it's congregations based on geographic area, encouraging people to attend the service based on where they live. This point is made to forestall the correlation causation criticism, that would imply the church I attend is particularlye attractive to people that have recently moved in from SoCal,
EDIT: Just to clarify my wife and I did not move from Cali, we moved from Utah, because it was getting filled up with people from Cali, that resulted in prices for housing going up considerably.