Constituencies of a parliamentary US

[President Punxsutawney Phil]

Puerto Rico has eight seats. That is going down to seven now.

[President Punxsutawney Phil]

San Juan: San Juan, Guaynabo, Trujillo Alto
507,282

Carolina: Carolina, Loiza, Canovanos, Rio Grande, Luquillo, Fajardo, Vieques, Ceiba, Naguabo, Celubra, Humacao, Las Piedras, Juncos
457,320

Bayamon: Bayamon, Catano, Toa Baja, Toa Alta, Naranjito, Dorado, Vega Alta, Corozal
485,523

Caguas: Yabucoa, San Lorenzo, Gurabo, Maunabo, Patillas, Arroyo, Caguas, Aguas Buenas, Guayama, Cayey, Cidra, Comeria
439,744

Ponce: Aibonito, Salinas, Coamo, Santa Isabel, Juana Diaz, Villalba, Ponce, Penuelas, Guayanilla, Yauco, Guanico, Sabana Grande, Lajas, Orocovis, Barranquitas,
476,490

Mayaguez: Cabo Rojo, Hormigueros, San German, Mayaguez, Anasco, Rincon, Aguada, Aguadilla, Moca, San Sebastian, Isabela, Quebradillas, Las Marias, Maricao,
458,355

Arecibo: Lares, Camuy, Hatillo, Adjuntas, Utuado, Arecibo, Jayuya, Barceloneta, Florida, Ciales, Manati, Vega Baja, Morovis
461,160

The loss of one member results in one constituency being eliminated (precisely which one was, is quite subjective.) San Juan expands, taking in Guaynabo, and three-and-a-half constituencies covering the San Juan metropolitan area become two-and-a-half. Ponce now stretches across most of the southern coast of the island. Population losses in the wake of Maria, and emigration, directly resulted in the loss of a constituency.

fyi, I am counting all seven PR seats as Biden-voting, D-leaning, for sake of completeness, but take this with a grain of salt. We don't know how Puerto Rico would vote, for sure. And we won't know if and until it actually becomes a state. Also, there is no DRA link because the newer versions of DRA do not have Puerto Rico available. The older version reliant on Microsoft Silverlight did.

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[President Punxsutawney Phil]

Spokane 50-46 Trump R+5
Walla Walla-Wenatchee 59-40 Trump R+13
Yakima 56-41 Trump R+11
Vancouver 49-48 Biden R+2
Longview-Olympia 51-46 Biden EVEN
Olympic 54-42 Biden D+3
Tacoma 62-34 Biden D+12
Rainier 50-46 Trump R+5
Kent 65-32 Biden D+15
Bellevue 64-33 Biden D+14
Seattle North 84-13 Biden D+35
Seattle South 87-10 Biden D+38
Redmond-Lake Stevens 63-33 Biden D+13
Everett 62-35 Biden D+12
North Cascades 56-41 Biden D+5

WA goes from 14 members to 15. This leads to the creation of an additional constituency in Western Washington. Keep in mind that road contiguity is not an absolute requirement, while trying to get county integrity as much as possible is. This leads to Longview-Olympia crossing the Cascades, in order to help keep Spokane and Walla Walla-Wenatchee the same. Population growth in exurban Portland leaves the constituency with Vancouver smaller and leads to St. Helens being removed from its name. Just as last time, Seattle is split in two along the Lake Washington Ship Canal. Olympic, Spokane, and Walla Walla-Wenatchee are the only constituencies unchanged.

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DRA

[President Punxsutawney Phil]

High Desert-Bend 57-41 Trump R+12
Umpqua-Siskiyou 57-40 Trump R+12
Eugene 55-42 Biden D+4
Salem-Corvallis 52-44 Biden D+2
Astoria-Hillsboro 53-43 Biden D+4
Portland East 82-15 Biden D+33
Portland West 74-23 Biden D+23
Clackamas-Hood River 54-43 Biden D+3

These districts are unchanged for the 2020s. Oregon only barely missed gaining a new district.

DRA

[President Punxsutawney Phil]

Anchorage West 54-43 Biden D+2
Anchorage East 57-40 Trump R+12
Juneau-Wasilla 60-37 Trump R+15
Bering-Barrow 50-45 Trump R+5

Juneau-Wasila and Bering-Barrow remain the same. Anchorage is rearranged to bring about the creation of a majority-minority district. Almost 40% of the total population of Bering-Barrow is Alaska Native.

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DRA

[President Punxsutawney Phil]

Hilo 67-31 Biden D+18
Honolulu 68-31 Biden D+18
Pearl Harbor 55-43 Biden D+8
Kaneohe 64-34 Biden D+14

Hilo is unchanged, and Pearl Harbor is essentially unchanged. Honolulu is now counterminous with the city limits of Honolulu City.

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DRA

[President Punxsutawney Phil]

American Samoa, Guam, the Virgin Islands, and the Mariana Islands all have an at-large member. The first will be counted as R-leaning, and the rest as D-leaning.

[President Punxsutawney Phil]

Everything done except California:
Biden 322
Trump 293

D+ PVI 280
R+ PVI 325
EVEN 14

CA will have 79 seats. This means that there will be 694 seats in total, with 348 needed for a majority.

[Anti-Bothsidesism]

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[President Punxsutawney Phil]

The images for NM and ID aren't showing up for me.

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quote the post then and look at what is within the  brackets. Copy that and place that in a new tab. If that doesn't work then your device might have display problems. Also: go to another device if possible and see if it's a problem with the device or something else.

[President Punxsutawney Phil]

The map for California has been drawn. Will try to get it posted today or tomorrow.

[President Punxsutawney Phil]

It has transpired that I forgot to name the constituencies of Northern California last time. As such, I will post the old map and the names of the 29 constituencies in Northern California under the old lines, before posting the new one.

[President Punxsutawney Phil]

Central Valley+Central Coast:
Visalia
Fresno North-Clovis
Fresno South
Yosemite-Merced
Modesto
Stockton
Monterey

San Francisco+San Mateo+Santa Clara+Santa Cruz:
San Francisco-Telegraph Hill
San Francisco-Daly City
San Mateo
Santa Clara-Sunnyvale
Santa Cruz-Los Gatos
Santa Clara-San Jose West
Santa Clara-San Jose East

Alameda+Contra Costa+Fairfield+Napa+Marin+Santa Rosa+Davis:
Alameda-Oakland
Alameda-Hayward
Alameda-Fremont
Contra Costa-Richmond
Contra Costa-Concord
Fairfield
Napa-Santa Rosa
Marin

Sacramento+Jefferson:
Sacramento
Arden-Arcade
Elk Grove
Lake Tahoe
Roseville
Redding-Chico
Eureka

[President Punxsutawney Phil]

Northern California

Southern Bay Area+Central Coast:
Sunnyvale 79-19 Biden D+30
San Jose North 70-29 Biden D+25
San Jose West 74-24 Biden D+24
San Jose East 68-30 Biden D+20
Santa Cruz 79-19 Biden D+30
San Mateo 77-21 Biden D+28
Oakland North-Berkeley 92-6 Biden D+43
Oakland South 82-16 Biden D+34
Tracy-Livermore 62-36 Biden D+16
Monterey 68-30 Biden D+19

Northern Bay Area:
San Francisco East 88-10 Biden D+39
San Francisco West 82-16 Biden D+34
Marin-Richmond 83-15 Biden D+34
Contra Costa West 71-27 Biden D+21
Contra Costa East 66-32 Biden D+16
Santa Rosa 74-23 Biden D+24
Fairfield 65-33 Biden D+15

Sacremento+Jefferson:
Eureka 53-44 Biden D+2
Redding-Chico 58-40 Trump R+12
Roseville 50-48 Trump R+4
Davis 60-37 Biden D+11
Arden-Arcade 53-45 Biden D+2
Sacramento 75-22 Biden D+26
Elk Grove 58-40 Biden D+7

Central Valley:
Stockton 57-41 Biden D+8
Merced-Manteca 51-46 Biden D+1
Modesto 49.2-48.5 Trump R+2
Yosemite-El Dorado 55-43 Trump R+9
Fresno South 62-36 Biden D+12
Fresno North-Clovis 52-46 Trump R+6
Tulare 53-45 Trump R+6

Population boosts Northern California from 29 to 31 members. Monterey and Eureka are the only completely unchanged constituencies. The effects of population growth are seen practically everywhere. Three seats nested in SF+San Mateo becomes four nested in SF+San Mateo+Santa Cruz, with almost two full seats in San Francisco proper, with the boundaries redrawn for sake of compactness. Four full seats are now nested in Santa Clara. Three is no longer enough for Alameda, and two for Contra Costa; the former has to pull from the Central Valley, and the latter from across the Bay.

Tulare can now form a full district, and Redding-Chico no longer splits a county. The latter expanding in size is evidence of the sluggishness of population growth in (parts of) the interior. This is fitting, since Butte County (home to Chico) declined in population from 2010 to 2020. The growth in parts of the interior however is evidenced in the lines - with Yosemite-Merced being dismantled and one of its successor seats moving north into the Sacremento metropolitan area.

[President Punxsutawney Phil]

Southern California

Los Angeles:
Los Angeles-Lancaster 55-43 Biden D+4
Los Angeles-San Fernando North 63-35 Biden D+14
Los Angeles-Malibu 71-23 Biden D+23
Los Angeles-San Fernando West 67-31 Biden D+31
Los Angeles-San Fernando Central 75-23 Biden D+28
Los Angeles-San Fernando East 65-33 Biden D+17
Los Angeles-Santa Monica 80-18 Biden D+31
Los Angeles-Lafayette Square 87-11 Biden D+39
Los Angeles-Torrance 65-33 Biden D+14
Los Angeles-Gardena 85-13 Biden D+33
Los Angeles-Long Beach South 73-25 Biden D+24
Los Angeles-Long Beach North 68-29 Biden D+19
Los Angeles-Compton 82-15 Biden D+37
Los Angeles-Downey 64-33 Biden D+16
Los Angeles-Downtown 81-17 Biden D+35
Los Angeles-Hollywood 83-15 Biden D+35
Los Angeles-Alhambra 68-30 Biden D+19
Los Angeles-East Los Angeles 75-23 Biden D+28
Los Angeles-Pomona 62-36 Biden D+12
Los Angeles-West Covina 65-33 Biden D+17

Orange County:
Orange-Mission Viejo 50-48 Biden R+2
Orange-Irvine 60-38 Biden D+8
Orange-Santa Ana 59-39 Biden D+10
Orange-Huntington Beach 49.4-48.5 Trump R+3
Orange-Garden Grove 53-45 Biden D+7
Orange-Anaheim 54-44 Biden D+4

San Diego+Imperial counties:
San Diego-Chula Vista 67-31 Biden D+19
San Diego-East County 54-44 Biden D+5
San Diego-Oceanside 60-38 Biden D+8
San Diego-El Cajon 50-47 Biden R+2
San Diego-Escondido 53-45 Biden EVEN
San Diego-Miramar 68-29 Biden D+18
San Diego-La Jolla 70-27 Biden D+20

Inland Empire:
Riverside-Palm Desert 60-39 Biden D+8
Riverside-Moreno Valley 55-43 Biden D+5
Riverside-Temecula 55-43 Trump R+9
Riverside-Corona 51-47 Biden EVEN
Riverside-Santa Ana* 59-39 Biden D+9
San Bernardino-Ontario 56-42 Biden D+6
San Bernardino-Fontana 64-34 Biden D+16
San Bernardino-Silverwood Lake 52-45 Biden D+2
San Bernardino-Mohave 54-44 Trump R+8
*=named for the Santa Ana river

Central Coast+Central Valley:
Oxnard 61-37 Biden D+11
Santa Barbara-Channel Islands 64-34 Biden D+14
San Luis Obispo 54-44 Biden D+3
Bakersfield North 61-37 Trump R+15
Bakersfield South-Kings 53-44 Biden D+4

There is only (relatively) minimal changes in San Bernardino County, and to lesser extent, Orange County, Santa Barbara County, and Ventura County. Imperial is no longer paired with Riverside; instead, it is paired with San Diego. No constituencies are left unchanged. Efforts were expended in order to keep any district from being over 90% Latino; this indirectly led to a larger number of Latino-controlled districts. The San Fernando Valley, in effect, loses a seat, and more central parts of LA County gain one.

San Diego changes considerably. In effect, San Diego-East County loses a lot of its population, in return for picking up Imperial County. This leads to it being drawn into the southernmost parts of San Diego as well, to preserve Latino opportunity. After San Diego-Chula Vista is redrawn in compact manner to compensate, this leaves room for three constituencies: El Cajon (which takes in suburbs directly east of the city), Miramar (which takes in minority areas in the eastern half of the city), and La Jolla (which takes in whiter areas in the western half of it).

There are also huge changes in Los Angeles County, too many to talk about thoroughly, though the county still keeps the same number of members - exactly twenty. Southern California goes from 46 to 48 members, with one new member each in San Diego and the Inland Empire.

Also of note is that all the Channel Islands, less the ones in Los Angeles County, have been unified in one constituency, the one crossing the Ventura-Santa Barbara county line.

DRA

[President Punxsutawney Phil]

Total figures, including California:
Biden 391
Trump 303

D+ PVI 345
R+ PVI 337
EVEN 16
The median district is likely very, very close to the national average. Keep in mind though, if you discount all of Puerto Rico's seats, you end up with 338-337, which is basically perfectly even.

[President Punxsutawney Phil]

A translating of this all into one map is in the works as we speak.

[President Punxsutawney Phil]

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[President Punxsutawney Phil]

Every state east of the Mississippi has been added to the map in progress.

[President Punxsutawney Phil]

340 D+1 or more PVI districts
18 EVEN
10 N/A
329 R+1 or more PVI districts
697 in total

[President Punxsutawney Phil]

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