Most extremely conservative county in the US

[𝕭𝖆𝖕𝖙𝖎𝖘𝖙𝖆 𝕸𝖎𝖓𝖔𝖑𝖆]

Holmes County, OH.
I'd say in a not strictly political sense, the Amish are far and away above everyone else in "extreme conservatism".

[𝕭𝖆𝖕𝖙𝖎𝖘𝖙𝖆 𝕸𝖎𝖓𝖔𝖑𝖆]

Holmes County, OH.
I'd say in a not strictly political sense, the Amish are far and away above everyone else in "extreme conservatism".

Well, Holmes county in Florida could be even more conservative...)))

If your definition of conservatism is "a higher percentage of votes for the Republican Party", yes.

[𝕭𝖆𝖕𝖙𝖎𝖘𝖙𝖆 𝕸𝖎𝖓𝖔𝖑𝖆]

Williamson, TN in every sense of the world

Because the poster usually known as Extreme Conservative lives there?

[𝕭𝖆𝖕𝖙𝖎𝖘𝖙𝖆 𝕸𝖎𝖓𝖔𝖑𝖆]

La Salle Parish, LA for racial conservatism/general reactionary-ness, from what I’ve heard.

Yes. It voted for a white Democrat over Bobby Jindal in 2003. It's David DuKKKe's best parish.

to be fair, so did 52/64 counties in the state.  Jindal won it in the next 2 elections.

If we are looking for most "racially conservative" (or just racist) counties in the country I'd look for whichever counties swung the hardest from Kerry to McCain and have never returned to the Democrats.

So basically eastern Kentucky, southern West Virginia, eastern Oklahoma and southwest Pennsylvania (outside Pittsburgh)?

SW Pennsylvania? Lmao it had a pretty mild swing compared to most of the Upper South. Southeastern Oklahoma and southeastern Kentucky come close, but it looks like the absolute hardest swing in 2008 was in northeastern Arkansas.

[𝕭𝖆𝖕𝖙𝖎𝖘𝖙𝖆 𝕸𝖎𝖓𝖔𝖑𝖆]

Williamson, TN in every sense of the world

Because the poster usually known as Extreme Conservative lives there?

ExtremeConserative (and Blairite) gave us really good posts upthread, and what I was thinking when I named Williamson was a more "cultural" conservatism that goes beyond the Trumpian Republican politics of our moment.  Williamson has some of the biggest Evangelical churches in the country (as alluded to), the population resides almost entirely in SFHs headed by married couples, is ~90% White, high income, and exhibits high levels of trust in social institutions (churches, schools, community groups, etc.)  I also like Blairite's suggestion as Baldwin, AL as a potential answer, but the historic French Catholic culture in Lower Alabama/Mobile diminishes Evangelical influence in the area a bit IMO.

I think they made really good points too, and the same goes for this post of yours.

However I still like my first answer, because whatever "cultural" conservatism Extreme Conservative and his neighbours have, I don't think it can even come close to Amish culture (even though the - barely a majority - non-Amish part of Holmes, OH, probably resembles rural Appalachia more than it does Williamson, TN).