Much of the work on this page is thanks to scribewraith, who composed this list for the newbie guide to Supernatural. If you have anything to add, or links to fix, feel free to edit this page, but consider dropping a comment over at newbieguide to keep that post up-to-date as well.

General News, Discussion and Meetup Communities

News and Information

spnnewsletter - A newsletter community providing links to news, fic, art, fanvids, episode related posts and meta
sn_newsletter - A newsletter providing links to news, fic, art, fanvids, episode related posts and meta (mostly inactive at the moment)
spn_info - A community for information and news about the fandom
supernatural_nb - Supernatural Noticeboard is an announce community for fic, recs and news
super_wiki - A community to support the Supernatural Wiki
wjag - Information about the Winchester Journal Archive and Gallery
sinful_updates - A community for updates to the Sinful Desire fic archive
samdean_archive - A community for the Sam/Dean slash archive (if you want your stories to be archived, you can post here and the mod will add them)
journalupdates - A community for notifications of updates to The Winchester Journals (Fanfic Archive and general fansite)
winchestercon - A community for the Winchester Con 2006
spndirectory - A guide to Supernatural on LJ
spn_meta - Once a week recap of meta from across LJ

Discussion

supernatural_tv - A moderated community for general discussion and news about the show
snslashnotebook - A discussion community about slash themes in Supernatural
chickchesters - A community for canon and meta discussion
spn_heavymeta - A meta discussion community
sn_theories - A community for discussion of theories and speculation about Supernatural
spn_live - A community for episode discussion
superspoiler - A community to post spoilers and discuss them
spn_spoilers - A spoiler collective
sn_discussion - A discussion community
supernaturalcw - A community to discuss Supernatural
spn_essays - A community for essays, discussion and analysis
sexy_sn_freaks - A community for nearly-everything Supernatural
spn_rocksalt - A general supernatural community
spnroundtable - A weekly round topic with themed discussion

Regional

spnmeet - A community to arrange meet ups to watch/talk about Supernatural
spnmeetup - A community to arrange meet ups to watch/talk about Supernatural
spn_downunder - An Australian and New Zealand Fan community
supernatural_au - A community for Australian fans
supernatural_uk - A UK based community for discussion of episodes
sn_uk - A community for UK fans to organise meet ups
spn_german - A German based community for Supernatural, fic welcome
winchester_de - A German language community for discussion of Supernatural
supernaturalbr - A portugese community for Supernatural discussion and news
spn_chicago - A community for Chicago fans
socalspn - A community for fans from Southern California
nocalspn - A community for fans from Northern California
spn_bc - A community for fans in British Columbia
spn_dc - A community for fans in the DC Metro Area
spn_it - A community for Italian fans
spn_nyc - A community for fans in NYC
spn_seattle - A community for fans in Seattle
spn_boston - A community for fans in Boston
spn_fangather07 - Fall 2007 Vancouver, BC gathering
supernatural_sg - A community for fans from Singapore
spn_texas - A community for fans from Texas
winchestmidwest - A Supernatural Midwest Gathering
spn_26up - For fans 26 years and older
supernatural_pl - A community for fans from Poland
ru_supernatural - A community for Russian SPN fans

General Supernatural

wb_supernatural - A community for fans
sn_daily - A picture only community for Supernatural
sn_quotes - A community to share quotes from the series
samanddean - A community dedicated to Supernatural
sn_rating - A community where people get to decide which character you're most like
spn_census - A community to show whos in the fandom (read the rules)
spn_anonymous - A community for Supernatural Fans
super_summer - A community for fanworks during the summer hiatus (06)
wincest_free - A community for which is Wincest Free
not_wincest - A community for everything but the Wincest
spn_request - A spinoff community from supernatural_tv where you can request pictures, sounds, anything that takes your fancy
super_random - A community for random things that remind you of Supernatural
ontheroadzine - A community to support a Genfic zine publishing Mid-October 2006
adopt_a_wendigo - A community to adopt a wendigo
spn_anniversary - A community to celebrate the first anniversary of Supernatural on Sept 13 2006
spn_gleeweek - A community to celebrate the countdown to Season 2
spn_picspam - A community for picspam
win_non_con - A community for people who can't make it to the Winchester Con
spn_facts - A community for facts about Supernatural
spn_fridayfive - Five questions about Supernatural every Friday
spn_roadtrip - A community to watch a group of fans plan their roadtrip to Winchestercon 2007
dhq_online - A community for the Demon Hunters Quarterly
spn_trading - A community for trading the Inkworks cards
dudemeter - A community tallying the times things are said
spnreview - A community for reviews of fic announced on the spnnewsletter
hell_quarterly - Online quarterly downloadable zine
spn_plastic - Plastic!Winchester Theatre
sim_winchesters - A Day in the life of... Sim Style
puffchesters - Supernatural, Powerpuff style
spn_buttons - Fan produced merchandise of buttons with Supernatural quotes
spn_marathon - A community to tide you over during the 2006 Hiatus
caplocks_spn - A community to talk about Supernatural in Capslock
dreaming_spn - Dreams people have about Supernatural
preseries_zine - A pre-series gen zine
spn_articles - A community to support fan written articles
spn_sssexy - A general community for Supernatural
supernaturalfam - A general community for Supernatural
spn_dejavu - A community to post when you think you've seen it before - in a fic, rl or on tv
winchestacular - A general community for Supernatural
spnfencentral - A 100% spoiler free community for fans

Communities for Fanactivism and Promotion of Supernatural

spn_goodwill - A community for connecting charity fanworks with sponsors
winchestertimes - A community for plans to promote Supernatural
promote_spn - A community for fanactivism promoting Supernatural
spn_postcards - A postcard fanactivism project
fandom_rocks - A community to help organize and run the Supernatural fandom campaigns for charity.

General Communities with some Supernatural Material

obsessions_r_us - A community for squeeing about obsessions with stars
cwboys - A community for the boys on any CW network show

Character Dedicated Communities

Sam and Dean

sam_dean - A community dedictated to Sam and Dean
spn_brotherlove - A community dedicated to the 'brother' relationship between Sam and Dean - no Sam/Dean slash (no Wincest)
wincest - A community dedicated to the slash relationship between Sam and Dean (Wincest)
padacklesrps - A community dedicated to the Real Person Slash pairing of Jensen Ackles and Jared Padalecki
dean_sam - A community dedicated to Dean and Sam
moon_hunters - A community dedicated to the Winchester Brothers
j2_daily - A Jared/Jensen picspam community
evil_deanandsam - A community for when the boys go bad

Sam

_jaredpadalecki - A community for fans of Jared Padalecki
jaredp_daily - A picture only community for Jared Padalecki
jared_p_still - An icon challenge community
jared_stillness - An icon challenge community
completelyjared - A community to discuss Jared Padalecki
entirelysammy - A community dedicated to Sam
samism_comm - A community for Sam lovers
hurt_sam - A community for hurt Sam stories and images
paddymelt - A community for any pairing with Jared in it
sammyed_away - A community for Sam fans
totalsamgirl - A community for fans of Sam
paddyhair_pwns - A community devoted to Sam's hair
evilsam_spn - A community devoted to Evil!Sam

Dean

acklesaholics - A community for fans of Jensen Ackles
jensen_daily - A non-fic community for Jensen Ackles (pictures, icons, news welcome)
entirelyjensen - A community for fans of Jensen Ackles
jensenfic - A fic community dedicated to Jensen Ackles (rps or characters)
jensenstillness - An icon challenge community
totaldeangirl - A community dedicated to girls into Dean
dear_dean - A fan written advice column
jensenslash - A community for fanfiction about Jensen Ackles
team_dean - A community for daily pictures of Dean Winchester
totaldeangirl - A community for fans of Dean
dean_fic - A community for fic about Dean
darkdean - A fic community for dark fics and fics with dark Dean

John

jdmorgan - A community dedicated to the actor who plays John Winchester
papawinchester - A community dedicated to the character John Winchester
jdmcentral - A community dedicated to JD Morgan
jeffathon - A ficathon for Jeffery Dean Morgan or any of the character's he plays

Metallicar, Hunters and other minor players

67impala - A community dedicated to the Impala the boys drive
sn_minorplayers - A community for the other hunters in Supernatural
spn_roadhouse - a community for Harvelle's Roadhouse and it's regulars
spn_stoners - A community for Ash (Chad Lindberg) and Andy (Gabriel Tigerman)
save_ava - A community to save the character Ava
mamawinchester - A community for Mary Winchester
only_jo - A community for Jo Harvelle

Fanfic, Art and Sound Communities

Fanfiction

sn_crossovers - A fic community for crossovers
sn_fic - A fic community for fic of any type (slash, gen, het, etc)
sn_slash - A fic community for slash fic
spn_gen - A fic community for gen fic
spn_het - A fic community for het fic
supernaturalfic - A fic and fan art community
sn_request - A community to request fic and fan art
hurt_dean - A community for art, fanfic, etc where Dean is hurt or tortured.
sn_flashback - A fic community for stories pre-series
super_real - A Supernatural RPS community
ficscripts - A community for writing fan scripts (SPN focussed)
winchesterwarts - A community for Harry Potter x Supernatural Crossovers
cw_moresomes - A Community for fic with multiple pairings from CW Network shows
sn_genswap_fem - A community for genderswap fic and female characters
spn_smut - A community for all your smutty supernatural fics, het or slash
spn_notkansas - A community for Gen, episodic style fic
boyhoodmoments - A community for snapshot fic
sncleanfic - A gen fic community
chickficmoments - A community for fic dealing with those moments Dean wants to avoid
rph_fic - A community for real person het fic
spnserial - A round robin community
mpregwinchester - A community for male pregnancy fic
unsung_hunters - A community for hunters that don't turn up in canon
spn_shorts - A weekly Drabble/Ficlet Challenge community
spn_christmas - Christmas fic community
weechesterfic - Fic about the Winchesters as children
padackles_1001 - 1001 places Jensen and Jared have had sex fic challenge comm
daddycest - A community for fic with John in the incest pairing
spn_dark_vault - A community for dark fic
spn_oblivious - A fic community
omgspn - A roleplay community for Out-Of-Character (OOC) characters
winsisterfic - A het/femmeslash community for the boys and/or a sister
spnfanfic_au - An AU fanfic community
j2prepschool - Jared's a student, Jensen's the teacher - Highschool AU Verse
100_ghosts - A Supernatural 100 word drabble community
snmissingscenes - A community for missing scenes, codas and episode tags

Fanfiction - Pairings

buffyxdean - A crossover community for Buffy/Dean
winchullivan - A crossover community for Winchester/Chloe Sullivan fans
faith_dean - A community for Faith (from Buffy/Angel) and Dean
paddymelt - A community for all pairings (RPF or fanfic) with Jared Padalecki or his characters
dean_alex - A community for Dean Winchester/Alex Krycek (SPN x X-Files)
samjess - A community for Sam and Jess
jo_sam - A community for the Sam/Jo pairing
dean_jo - A community for the Dean/Jo pairing
deanjo_fanfic - A community for the Dean/Jo pairing
ava_sam - A community for Ava/Sam
sn_auguries - A community for Ava/Sam shippers
sam_ellen - A community for Sam/Ellen shippers
thebeckles - A community for Veronica Mars/Dean & Jensen Ackles/Kristen Bell
peter_and_sam - A community for Peter Petrelli (Heroes) and Sam
lorelai_sam - A community for Sam and Lorelai Gilmore (Gilmore Girls) and Dean Forester/Lorelai Gilmore from Gilmore Girls.

Fanfiction - Resources

spnstoryfinders - A fic search community
spn_recs - a community for fic recs
spn_themes - A community for themed fic recs
spn_betas - a community for fic writers to find betas and betas to volunteer
spn_reference - A resource guide with episode transcripts, guides, bios and helpful links
spn_research - A community for researching for Supernatural fanfic
spn_bunnies - A community for bunnies of all kinds: plot, vids, art etc
spn_possession - A community for resources for fic writers
spn_transcripts - A community for transcripts of each episode
crack_impala - A fic rec community
spn_connect - A fic writers' community

Fanart (including Icons and Vids)

supernatu_icons - A community for showing off Supernatural icons
super_awards - An open nomination icon awards community
winchestercases - An icon community
good_snicons - An elite icon making community (posting access is restricted)
supernaturalvid - A community for fan vids
supernaturalart - A community for fan art
super_graphics - A community for fan art - must join to see entries
sn_honors - A community for honoring art in the Supernatural fandom
the_dean_show - A community for urd_sama's chibis
spn_dolls - A community for Supernatural Dolls
supericon100 - A community for making 100 themed icons
impala_chorus - A community for icons based on songs from the show
spn_color - A coloring in book community for lineart
spn_caps - A community for screencaps from Supernatural
j2_icons - A community for Jared/Jensen Icons
deanandsamlims - A Last Icon Maker Standing Community
sardean_sammich - A Sam/Dean fancomic
spncaptions - A community for caption challenges

Fansounds

driving_music - A community for fanmixes
spn_soundtrack - A community to make a soundtrack
super_radio - A community for downloading music played in Supernatural
sn_eighttrack - A community for downloading music from Supernatural (mostly inactive)
spnfic_podcast - A community for a spn fanfic podcast
spn_audio_novel - A podcast for Supernatural Novels
spn_multimedia - A community for all forms of mulitmedia fanworks

Ficathons and Challenges

spn_flashfic - A bi-weekly fic challenge community
spn500 - A challenge community for fic under 500 words
supernatural100 - A drabble challenge community
spn_100 - A fanfic 100 community
spn_challenges - A community with regular fanfic challenges
spncross - A crossover challenge community
spn_prompts - A fic challenge community
spn_mmom - A fic challenge community for Masturbation month
kaz2y5 - A multimedia challenge community
super_stillness - An icon challenge community
super_icontest - An icon challenge community
spn_lims - An icon challenge community: Last iconmaker standing
spn_50states - A fic and fanart challenge community
spn_north - A fic and fanart challenge community
rocksaltwhores - A Supernatural challenge community
spn_handbasket - A community for Wincest Challenges
spnlims - A Last Icon Maker Standing community
paranormal25 - A multifandom 25 story challenge
spn_holidays - A secret santa community
spn_halloween - A Halloween Ficathon
spn_fluffathon - A ficathon for fluff
sam_slut_a_thon - A challenge writing community for slutty Sam fic
dr_badass_is_in - Ash-centric cliche!fic challenge
weechestercest - Wee!Cest fic-a-thon
spn_hols - A challenge-a-day com for December 06
spn_vday - A Valentines day fic-a-thon
spn_rimmathon - A 'not quite buttsex ficathon'
jsquared_xxxmas - A 12 days of Christmas ficathon
spn_black_dogs - A frottage ficathon
j2_otpathon - A J-squared(Jared/Jensen) OTP ficathon
spn_wank_off - A masturbation ficathon
spn_secrets - An anonymous fic challenge community with prizes for guessing the authors
spn_j2_bigbang - A 20,000 word and fanvid challenge
spn_outsidepov - A ficathon to write about the Winchesters from an outside point of view
spn_iconathon - An icon challenge community
spn_heraea - A Schmoop vs Angst Olympics
spn_appreciate - A challenge to share the appreciation of fandom participation
batoutofkansas - A Meatloaf Supernatural prompt challenge
spn_25 - A 25 prompt fic challenge community

Livejournal Communities

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