Available LLVM/Clang versions

Ubuntu (deb) packages

Ubuntu version	available LLVM/Clang versions	llvm-defaults
25.10 (Questing Quokka)	14, 15, 17, 18, 19, 20, 21	20
25.04 (Plucky Puffin)	14, 15, 17, 18, 19, 20	20
24.10 (Oracular Oriole)	14, 15, 16, 17, 18, 19	19
24.04 LTS (Noble Numbat)	14, 15, 16, 17, 18, 19	18
22.04 LTS (Jammy Jellyfish)	11, 12, 13, 14, 15	14
20.04 LTS (Focal Fossa)	6, 7, 8, 9, 10, 11, 12, 18	10
18.04 LTS (Bionic Beaver)	3.7, 3.9, 4, 5, 6, 7, 8, 9, 10	6
16.04 LTS (Xenial Xerus)	3.6, 3.7, 3.8, 3.9, 4, 5, 6, 8	3.8
14.04 LTS (Trusty Tahr)	3.3, 3.4, 3.5, 3.6, 3.8, 3.9	3.4

bold – package is in main

LLVM Version	Source package
(close to the latest upstream snapshot)	llvm-toolchain-snapshot
20	llvm-toolchain-20
19	llvm-toolchain-19
18	llvm-toolchain-18
17	llvm-toolchain-17
16	llvm-toolchain-16
15	llvm-toolchain-15
14	llvm-toolchain-14
13	llvm-toolchain-13
12	llvm-toolchain-12
11	llvm-toolchain-11
10	llvm-toolchain-10
9	llvm-toolchain-9
8	llvm-toolchain-8
7	llvm-toolchain-7
6	llvm-toolchain-6.0
5	llvm-toolchain-5.0
4	llvm-toolchain-4.0
3.9	llvm-toolchain-3.9
3.8	llvm-toolchain-3.8
3.7	llvm-toolchain-3.7
3.6	llvm-toolchain-3.6
3.5	llvm-toolchain-3.5
3.4	llvm-toolchain-3.4
3.3	llvm-toolchain-3.3