diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6417d8a..7093459 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 ## Unreleased - [ReleaseDate]
 
+### Added
+
+- Add shell completions, accessed by enabling the `COMPLETE` environment variable [#6](https://github.com/LucasPickering/env-select/issues/6)
+  - For example, adding `COMPLETE=fish es | source` to your `fish.config` will enable completions for fish
+  - [See docs](https://env-select.lucaspickering.me/book/user_guide/shell_completions.html) for more info and a list of supported shells
+
 ### Changed
 
 - Upgrade Rust version to 1.80.0
diff --git a/Cargo.lock b/Cargo.lock
index cd0caa4..86d42a9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -43,23 +43,24 @@ dependencies = [
 
 [[package]]
 name = "anstream"
-version = "0.5.0"
+version = "0.6.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1f58811cfac344940f1a400b6e6231ce35171f614f26439e80f8c1465c5cc0c"
+checksum = "64e15c1ab1f89faffbf04a634d5e1962e9074f2741eef6d97f3c4e322426d526"
 dependencies = [
  "anstyle",
  "anstyle-parse",
  "anstyle-query",
- "anstyle-wincon 2.1.0",
+ "anstyle-wincon 3.0.4",
  "colorchoice",
+ "is_terminal_polyfill",
  "utf8parse",
 ]
 
 [[package]]
 name = "anstyle"
-version = "1.0.2"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "15c4c2c83f81532e5845a733998b6971faca23490340a418e9b72a3ec9de12ea"
+checksum = "1bec1de6f59aedf83baf9ff929c98f2ad654b97c9510f4e70cf6f661d49fd5b1"
 
 [[package]]
 name = "anstyle-parse"
@@ -91,12 +92,12 @@ dependencies = [
 
 [[package]]
 name = "anstyle-wincon"
-version = "2.1.0"
+version = "3.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58f54d10c6dfa51283a066ceab3ec1ab78d13fae00aa49243a45e4571fb79dfd"
+checksum = "5bf74e1b6e971609db8ca7a9ce79fd5768ab6ae46441c572e46cf596f59e57f8"
 dependencies = [
  "anstyle",
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -346,32 +347,43 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "clap"
-version = "4.4.0"
+version = "4.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d5f1946157a96594eb2d2c10eb7ad9a2b27518cb3000209dec700c35df9197d"
+checksum = "7be5744db7978a28d9df86a214130d106a89ce49644cbc4e3f0c22c3fba30615"
 dependencies = [
  "clap_builder",
  "clap_derive",
- "once_cell",
 ]
 
 [[package]]
 name = "clap_builder"
-version = "4.4.0"
+version = "4.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78116e32a042dd73c2901f0dc30790d20ff3447f3e3472fad359e8c3d282bcd6"
+checksum = "a5fbc17d3ef8278f55b282b2a2e75ae6f6c7d4bb70ed3d0382375104bfafdb4b"
 dependencies = [
- "anstream 0.5.0",
+ "anstream 0.6.15",
  "anstyle",
  "clap_lex",
  "strsim",
 ]
 
+[[package]]
+name = "clap_complete"
+version = "4.5.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74a01f4f9ee6c066d42a1c8dedf0dcddad16c72a8981a309d6398de3a75b0c39"
+dependencies = [
+ "clap",
+ "clap_lex",
+ "is_executable",
+ "shlex",
+]
+
 [[package]]
 name = "clap_derive"
-version = "4.4.0"
+version = "4.5.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9fd1a5729c4548118d7d70ff234a44868d00489a4b6597b0b020918a0e91a1a"
+checksum = "4ac6a0c7b1a9e9a5186361f67dfa1b88213572f427fb9ab038efb2bd8c582dab"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -381,9 +393,9 @@ dependencies = [
 
 [[package]]
 name = "clap_lex"
-version = "0.5.1"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd7cc57abe963c6d3b9d8be5b06ba7c8957a930305ca90304f24ef040aa6f961"
+checksum = "1462739cb27611015575c0c11df5df7601141071f07518d56fcc1be504cbec97"
 
 [[package]]
 name = "colorchoice"
@@ -534,6 +546,7 @@ dependencies = [
  "anyhow",
  "assert_cmd",
  "clap",
+ "clap_complete",
  "ctrlc",
  "derive_more",
  "dialoguer",
@@ -752,9 +765,9 @@ checksum = "2c6201b9ff9fd90a5a3bac2e56a830d0caa509576f0e503818ee82c181b3437a"
 
 [[package]]
 name = "heck"
-version = "0.4.1"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
 [[package]]
 name = "hermit-abi"
@@ -784,6 +797,21 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "is_executable"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ba3d8548b8b04dafdf2f4cc6f5e379db766d0a6d9aac233ad4c9a92ea892233"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "is_terminal_polyfill"
+version = "1.70.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
+
 [[package]]
 name = "itertools"
 version = "0.10.5"
@@ -992,9 +1020,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.66"
+version = "1.0.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18fb31db3f9bddb2ea821cde30a9f70117e3f119938b5ee630b7403aa6e2ead9"
+checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
 dependencies = [
  "unicode-ident",
 ]
@@ -1201,6 +1229,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24188a676b6ae68c3b2cb3a01be17fbf7240ce009799bb56d5b1409051e78fde"
 
+[[package]]
+name = "shlex"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.1"
@@ -1244,9 +1278,9 @@ checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
 [[package]]
 name = "strsim"
-version = "0.10.0"
+version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
 [[package]]
 name = "syn"
diff --git a/Cargo.toml b/Cargo.toml
index f1ad3b1..3794517 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,8 @@ path = "src/main.rs"
 
 [dependencies]
 anyhow = {version = "^1.0.65", features = ["backtrace"]}
-clap = {version = "^4.4.0", features = ["derive"]}
+clap = {version = "^4.5.19", features = ["derive"]}
+clap_complete = {version = "4.5.32", features = ["unstable-dynamic"]}
 ctrlc = "^3.2.3"
 derive_more = "^0.99.17"
 dialoguer = {version = "^0.10.2", default-features = false}
diff --git a/docs/src/SUMMARY.md b/docs/src/SUMMARY.md
index e5f35a3..1502663 100644
--- a/docs/src/SUMMARY.md
+++ b/docs/src/SUMMARY.md
@@ -15,6 +15,7 @@
 - [Inheritance & Cascading Configs](./user_guide/inheritance.md)
 - [Side Effects](./user_guide/side_effects.md)
 - [`es run` and Shell Interactions](./user_guide/run_advanced.md)
+- [Shell Completions](./user_guide/shell_completions.md)
 
 # API Reference
 
diff --git a/docs/src/user_guide/shell_completions.md b/docs/src/user_guide/shell_completions.md
new file mode 100644
index 0000000..e90417f
--- /dev/null
+++ b/docs/src/user_guide/shell_completions.md
@@ -0,0 +1,43 @@
+# Shell Completions
+
+Env-select provides tab completions for most shells. For the full list of supported shells, [see the clap docs](https://docs.rs/clap_complete/latest/clap_complete/aot/enum.Shell.html).
+
+> Note: Env-select uses clap's native shell completions, which are still experimental. [This issue](https://github.com/clap-rs/clap/issues/3166) outlines the remaining work to be done.
+
+To source your completions:
+
+**WARNING:** We recommend re-sourcing your completions on upgrade.
+These completions work by generating shell code that calls into `your_program` while completing. That interface is unstable and a mismatch between the shell code and `your_program` may result in either invalid completions or no completions being generated.
+
+For this reason, we recommend generating the shell code anew on shell startup so that it is "self-correcting" on shell launch, rather than writing the generated completions to a file.
+
+## Bash
+
+```bash
+echo "source <(COMPLETE=bash es)" >> ~/.bashrc
+```
+
+## Elvish
+
+```elvish
+echo "eval (E:COMPLETE=elvish es | slurp)" >> ~/.elvish/rc.elv
+```
+
+## Fish
+
+```fish
+echo "source (COMPLETE=fish es | psub)" >> ~/.config/fish/config.fish
+```
+
+## Powershell
+
+```powershell
+echo "COMPLETE=powershell es | Invoke-Expression" >> $PROFILE
+```
+
+## Zsh
+
+````zsh
+echo "source <(COMPLETE=zsh es)" >> ~/.zshrc
+```
+````
diff --git a/src/commands/mod.rs b/src/commands/mod.rs
index eb6fba3..0f2b129 100644
--- a/src/commands/mod.rs
+++ b/src/commands/mod.rs
@@ -6,6 +6,7 @@ use crate::{
     commands::{
         init::InitCommand, run::RunCommand, set::SetCommand, show::ShowCommand,
     },
+    completions::{complete_application, complete_profile},
     config::{Config, Name, Profile},
     console::prompt_options,
     environment::Environment,
@@ -14,6 +15,7 @@ use crate::{
     GlobalArgs,
 };
 use clap::Subcommand;
+use clap_complete::ArgValueCompleter;
 use smol::lock::OnceCell;
 use std::path::PathBuf;
 
@@ -58,10 +60,12 @@ trait SubcommandTrait {
 pub struct Selection {
     /// Application to select a profile for. If omitted, an interactive prompt
     /// will be shown to select between possible options
+    #[clap(add = ArgValueCompleter::new(complete_application))]
     pub application: Option<Name>,
 
     /// Profile to select. If omitted, an interactive prompt will be shown to
     /// select between possible options.
+    #[clap(add = ArgValueCompleter::new(complete_profile))]
     pub profile: Option<Name>,
 }
 
diff --git a/src/commands/show.rs b/src/commands/show.rs
index 3d98f6e..b46282e 100644
--- a/src/commands/show.rs
+++ b/src/commands/show.rs
@@ -1,8 +1,10 @@
 use crate::{
     commands::{CommandContext, SubcommandTrait},
+    completions::{complete_application, complete_profile},
     config::{MapExt, Name},
 };
 use clap::{Parser, Subcommand};
+use clap_complete::ArgValueCompleter;
 
 /// Print configuration and meta information
 #[derive(Clone, Debug, Parser)]
@@ -19,9 +21,11 @@ enum ShowSubcommand {
         // are incorrect for this use case
         /// Application to show configuration for. If omitted, show all
         /// applications.
+        #[clap(add = ArgValueCompleter::new(complete_application))]
         application: Option<Name>,
         /// Profile to show configuration for. If omitted, show all profiles
         /// for the selected application.
+        #[clap(add = ArgValueCompleter::new(complete_profile))]
         profile: Option<Name>,
     },
     /// Print the name or path to the shell in use
diff --git a/src/completions.rs b/src/completions.rs
new file mode 100644
index 0000000..72a6dd4
--- /dev/null
+++ b/src/completions.rs
@@ -0,0 +1,44 @@
+use crate::config::{Config, Name};
+use clap_complete::CompletionCandidate;
+use std::ffi::OsStr;
+
+/// Provide completions for application names
+pub fn complete_application(current: &OsStr) -> Vec<CompletionCandidate> {
+    let Ok(config) = Config::load() else {
+        return Vec::new();
+    };
+
+    get_candidates(config.applications.keys().map(Name::as_str), current)
+}
+
+/// Provide completions for profile names
+pub fn complete_profile(current: &OsStr) -> Vec<CompletionCandidate> {
+    let Ok(config) = Config::load() else {
+        return Vec::new();
+    };
+
+    // Suggest all profiles for all applications. Ideally we could grab the
+    // prior argument to tell us what application we're in, but I'm not sure if
+    // clap exposes that at all
+    get_candidates(
+        config
+            .applications
+            .values()
+            .flat_map(|application| application.profiles.keys())
+            .map(Name::as_str),
+        current,
+    )
+}
+
+fn get_candidates<'a>(
+    iter: impl Iterator<Item = &'a str>,
+    current: &OsStr,
+) -> Vec<CompletionCandidate> {
+    let Some(current) = current.to_str() else {
+        return Vec::new();
+    };
+    // Only include IDs prefixed by the input we've gotten so far
+    iter.filter(|value| value.starts_with(current))
+        .map(CompletionCandidate::new)
+        .collect()
+}
diff --git a/src/config/mod.rs b/src/config/mod.rs
index fdb804b..97d2811 100644
--- a/src/config/mod.rs
+++ b/src/config/mod.rs
@@ -229,6 +229,12 @@ impl Config {
     }
 }
 
+impl Name {
+    pub fn as_str(&self) -> &str {
+        self.0.as_str()
+    }
+}
+
 // Validate application/profile name. We do a bit of sanity checking here to
 // prevent stuff that might be confusing, or collide with env-select features
 impl FromStr for Name {
diff --git a/src/main.rs b/src/main.rs
index 198072f..c89dd24 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
 mod commands;
+mod completions;
 mod config;
 mod console;
 mod environment;
@@ -10,9 +11,10 @@ mod test_util;
 mod shell;
 
 use crate::{commands::Commands, error::ExitCodeError, shell::ShellKind};
-use clap::Parser;
+use clap::{CommandFactory, Parser};
 use log::{error, LevelFilter};
 // https://github.com/la10736/rstest/tree/master/rstest_reuse#cavelets
+use clap_complete::CompleteEnv;
 #[cfg(test)]
 #[allow(clippy::single_component_path_imports)]
 use rstest_reuse;
@@ -51,6 +53,8 @@ pub struct GlobalArgs {
 }
 
 fn main() -> ExitCode {
+    // If COMPLETE var is enabled, process will stop after completions
+    CompleteEnv::with_factory(Args::command).complete();
     let args = Args::parse();
     env_logger::Builder::new()
         .format_timestamp(None)