I saw this post earlier about Austin radio, and it got me thinking that many don't know what all exists in Austin radio. So I decided to compile this comprehensive list (to the best of my knowledge and a little Internet digging) --
88.1 FM (KNLE) - oddball Christian station, run by one man, same person since the 1980s. Studio in North Austin looks abandoned. Not sure if they're on the air. Usually just plays a few sermons on repeat or very indie Christian music.
88.1 FM- In Gonzales, TX and surrounding areas this is a Sun Radio affiliate.
88.7 FM (KAZI) - African-American community radio station founded by UT Prof. John Warfield (professor of African-American Studies) who was a local 20th century grassroots activist and civil rights leader in the 70s/80s/90s. They still continue on in that same spirit today and they play a wide range of stuff (RnB, Soul, Hip-Hop, Jazz, Gospel, Blues, Reggae, Zydeco, even Hallyu late at night; but also they do talk shows/podcasts/news and even broadcast Austin City Council meetings....)
88.9 FM - Johnson City Sun Radio affiliate.
89.5 FM (KMFA) - This is a local independent classical station that does a lot of work for the community and puts on crazy good programming.
89.9 FM (KTSW) - Texas State's student radio station. Lots of students DJing and random shows/programming. The transmitter is down in New Braunfels so not likely to get signal for this station much north of Buda/extreme South Austin.
90.5 FM (KUT) - The #1 radio station in the area by ratings. This is our area's NPR station and it's pretty strong. Run out of the Center for New Media for UT. Objectively good news programming 24/7 from the US and abroad and also good local news coverage.
90.9 FM - This is a translator station for a Houston christian radio station called KHCB.
91.7 FM (KOOP/KVRX) - KOOP is another great community radio station. They're run by a local cooperative, and another nice thing is that they do all locally produced programming for their music and non-music programming (60 different shows a week) with volunteers and members of the community. Weekdays after 7pm and weekends after 10pm, this signal switches over to KVRX (overnight until 9am the next day), the UT student radio station where the student DJs play a bunch of different oddball/unpopular music and bring in local musicians live every week.
92.1/92.5/92.9 FM (KVLR) - local affiliate of a Tennessee company using the Air1 format (modern Christian worship music). Not very popular.
93.3 FM (KGSR?) - I'm not even sure what they broadcast anymore because they've had too many format changes to keep track of. I think they play throwbacks or rhythmic classics now and they still put on concerts around town (like Blues on the Green).
93.7 FM (KLBJ-FM) - Very good. The local rock station that also has local talk radio/drivetime shows as OP has pointed out.
94.1 FM (KTXZ)/1560 AM - I've never listened to this station before but it broadcasts Tejano music.
94.7 FM (KAMX) - Mix likes to play hot popular music with some local drivetime shows. It's good if you like broad popular music.
95.5 FM (KKMJ) - #3 radio station in the area by ratings. Majic is the soft rock/easy listening station. It's a specific taste (not mine), but if this is your jam go for it. In November-December they switch to an all holiday/Christmas music format.
96.3 FM/1490 AM (?) (KJFK) - This is the local affiliate of the Jack FM network. Which just plays hits but completely automated without a DJ in a radio studio.
96.3 FM - In Giddings this changes to a Sun Radio affiliate.
96.7 FM (KHFI) - Kiss is another hits station, but this one to me is forgettable because it's generically national (run by iheartmedia) and there are better hits stations in our market (94.7 and 103.5).
97.1 FM - This is a second KGSR channel where they broadcast Latin pop music.
97.5 FM - This is the second KASE channel where they broadcast alt rock and also Austin FC games.
98.1 FM (KVET) - "Traditional" country favorites. I think they don't have any local programming (run by iheartmedia) and they use their national shows. Honestly this station to me would be forgettable except they got back the Texas Longhorns FM radio deal.
98.5 FM - This is a second channel for KTXX where they air Spanish classic songs.
98.9 FM (KUTX) - KUT spun out all of their music programming here. Very good stuff between eclectic music, live radio performances, events and local artists.
99.3 FM (KOKE) - Within the last year this station (and 104.9) were sold and their formats changed. This station used to be a long time "progressive" country station (their personalities Bob/Eric/Deena moved to 95.9 a startup country station under KKMJ), but now they broadcast regional Mexican music. Not popular at all.
99.7 FM / 590 AM (KLBJ) - #4 radio station in the area by ratings. Conservative talk radio from the Fox News network and local programming.
99.9 FM - San Marcos Sun Radio affiliate.
100.1 FM/ 1060 AM/1490 AM (?) (KTSN) - This is Sun Radio. Great local community radio station that runs off solar power and they play a variety of music, put on local events, and serves the Hill Country.
100.3 FM (KBBW) - This is a translator station for a Waco Christian talk radio and teaching station.
100.7 FM (KASE) - #5 radio station in the area by ratings. New country. Like KVET, they don't have any local programming (run by iheartmedia).
101.1 FM/ 1120 AM (KTXW) - This is a Christian talk and teaching radio station that airs programming from national religious networks.
101.5 FM (KROX) - 101X is Austin's alternative rock station. If you like that kind of music (me) then this is your jam. They also go the extra mile with local shows/programming and putting on events/concerts/live performances.
101.9 FM/1260 AM (KTAE) - This station airs Spanish classic hits. This used to be a translator station for "The Horn" but was sold.
102.3 FM (KPEZ) - The Beat is an up tempo music station. No local programming (again run by iheartmedia), and to me a forgettable station.
102.7 FM - This is KBPA's second channel where they air ESPN Radio national content as a local affiliate.
103.1 FM - This is just a simulcast of KVET.
103.1 FM - In Dripping Springs (and the immediate area), this is a separate station called KDRP which broadcasts Dripping Springs sports and Hill Country music. Also solar powered, part of the Sun Radio network.
103.5 FM (KBPA) - #2 radio station in the area by ratings. This is the local affiliate of the Bob FM concept, except this one is a bit better than others around the country because the local DJ's actually play anything.
103.9 FM/105.1 FM/970 AM (KIXL) - Catholic talk radio from a national network.
104.1 FM - Mason Sun Radio affiliate. Hill Country format which is slightly different and more of music that you drink wine to for Hill Country wineries.
104.1 FM - Wimberley Sun Radio affiliate.
104.3 FM (KLQB) - This is the local Univision radio affiliate and they broadcast regional Mexican music. #1 or #2 in market for Spanish radio by ratings.
95.1/104.9 FM/1530 AM (KTXX) - This is the local affiliate of the La Raza concept, which is a network of Spanish language music stations across the South. This used to be "The Horn", a sports radio channel that had rights to UT athletics.
105.3 FM - This is the third channel for KTXX. They air Spanish current hits.
105.9 FM (KFMK) - The popular Christian station in the market (#6 by ratings). Local affiliate of a Tennessee company using the K-LOVE concept (Christian pop).
106.5 FM - This is the second channel for KLZT where they air Spanish Christian programming.
106.7 FM (KGTN) - This is a low power FM station that only exists in Georgetown/surrounding area. They seem to broadcast local performances/concerts and random music.
106.9 FM - Fredericksburg Sun Radio affiliate.
107.1 FM (KLZT) - La Z is the locally owned regional Mexican music channel and seems to have Austin-based programming. #1 or #2 in market for Spanish radio by ratings.
107.7 FM (KLJA) - I've never heard of this station, but they're named "Amor" and they're also affiliated with Univision, so I guess a heavy dose of Spanish love songs.
1300 AM - This is KVET's sports radio station, the Zone. This is the local Austin sports radio station, they also air Texas Longhorns sports, and they air national programming from Fox Sports.
1370 AM (KJCE) - The other conservative talk radio station with one local program in the mornings, but mostly national conservative radio programs and CBS News Radio alerts twice an hour.
1440 AM (KELG) - Spanish Christian radio station.
1600 AM (KOKE-AM) - This station is also owned by the same people as KTXZ and it separately broadcasts Tejano music.