And vice-versa?
I suppose it depends on how you define significant, but the Bronx is probably a good candidate. On the other hand, Denton County or whatever county Norman, OK is in are probably near that as well.
Owyhee County and Custer County in Idaho are about the most Republican counties to have Democratic precincts. Since 1968 they have been regulars in Republican “Top 100”s, but in ski resorts and Owyhee’s Native American areas there are some notably Democratic precincts. The Democratic areas of Custer County are in the west bordering Blaine County; those of Owyhee are in the far southwest. Bingham County – in the heart of archconservative southeastern Idaho – also has some Democratic areas in its south-central area on the Fort Hall Reservation.
A few counties in northwestern Arkansas, notably Newton (a historically GOP unionist county that even voted for Alf Landon) have Democratic enclaves (Murray) that must be alternative lifestyle or resort towns. Union County, Pennsylvania – which has not voted Democratic in 180 years – has areas in its east near Milton that have voted Democratic consistently in recent times – what the explanation is I am not sure since Lebanon County, almost as staunchly Republican, lacks them despite being much larger by population.
Über-Republican Washington, Kane and Garfield Counties in southern Utah have precincts won by Obama and Hilary Clinton in their highland areas (Springfield in Washington, Boulder and Ticaboo in Garfield; the east of Kane County) but these are “swing” precincts which have alternated between parties.
Apache County, Arizona – which last voted Republican in 1980 – has white Mormon precincts that are as Republican as most of Utah or Wyoming. Imperial County, California, where Hilary Clinton gained 67 percent of the total vote, has major areas in irrigation districts that are 80 percent Republican, and Monterey County has similar areas in the Salinas Valley.
Orange County, North Carolina – 77 percent for Clinton with an 88-year unbroken Democratic sequence as of 2020 – has significant Republican or swing areas in its north – as does even more Democratic Durham County.
