diff --git a/src/bin/ruff.rs b/src/bin/ruff.rs
index 08b13788f0..0ca3224fc6 100644
--- a/src/bin/ruff.rs
+++ b/src/bin/ruff.rs
@@ -11,6 +11,7 @@ use notify::{raw_watcher, RecursiveMode, Watcher};
 use rayon::prelude::*;
 use walkdir::DirEntry;
 
+use ::ruff::checks::CheckCode;
 use ::ruff::fs::iter_python_files;
 use ::ruff::linter::check_path;
 use ::ruff::logging::set_up_logging;
@@ -39,6 +40,12 @@ struct Cli {
     /// Disable cache reads.
     #[clap(short, long, action)]
     no_cache: bool,
+    /// Comma-separated list of error codes to enable.
+    #[clap(long)]
+    select: Vec<CheckCode>,
+    /// Comma-separated list of error codes to ignore.
+    #[clap(long)]
+    ignore: Vec<CheckCode>,
 }
 
 fn run_once(files: &[PathBuf], settings: &Settings, cache: bool) -> Result<Vec<Message>> {
@@ -107,7 +114,13 @@ fn inner_main() -> Result<ExitCode> {
 
     // TODO(charlie): Can we avoid this cast?
     let paths: Vec<&Path> = cli.files.iter().map(PathBuf::as_path).collect();
-    let settings = Settings::from_paths(paths)?;
+    let mut settings = Settings::from_paths(paths)?;
+    if !cli.select.is_empty() {
+        settings.select(&cli.select);
+    }
+    if !cli.ignore.is_empty() {
+        settings.ignore(&cli.ignore);
+    }
 
     if cli.watch {
         // Perform an initial run instantly.
diff --git a/src/checks.rs b/src/checks.rs
index 7c6a90ffa3..868b2cb3d0 100644
--- a/src/checks.rs
+++ b/src/checks.rs
@@ -1,5 +1,7 @@
+use anyhow::Result;
 use rustpython_parser::ast::Location;
 use serde::{Deserialize, Serialize};
+use std::str::FromStr;
 
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Hash, PartialOrd, Ord)]
 pub enum CheckCode {
@@ -13,6 +15,24 @@ pub enum CheckCode {
     F901,
 }
 
+impl FromStr for CheckCode {
+    type Err = anyhow::Error;
+
+    fn from_str(s: &str) -> Result<Self> {
+        match s {
+            "E501" => Ok(CheckCode::E501),
+            "F401" => Ok(CheckCode::F401),
+            "F403" => Ok(CheckCode::F403),
+            "F541" => Ok(CheckCode::F541),
+            "F634" => Ok(CheckCode::F634),
+            "F706" => Ok(CheckCode::F706),
+            "F831" => Ok(CheckCode::F831),
+            "F901" => Ok(CheckCode::F901),
+            _ => Err(anyhow::anyhow!("Unknown check code: {s}")),
+        }
+    }
+}
+
 impl CheckCode {
     pub fn as_str(&self) -> &str {
         match self {
diff --git a/src/lib.rs b/src/lib.rs
index a5c2d7803b..21eb15a345 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,7 @@
 mod cache;
 pub mod check_ast;
 mod check_lines;
-mod checks;
+pub mod checks;
 pub mod fs;
 pub mod linter;
 pub mod logging;
diff --git a/src/settings.rs b/src/settings.rs
index 6fe6f56145..e207451630 100644
--- a/src/settings.rs
+++ b/src/settings.rs
@@ -54,4 +54,12 @@ impl Settings {
             }),
         })
     }
+
+    pub fn select(&mut self, codes: &[CheckCode]) {
+        self.select.retain(|code| codes.contains(code));
+    }
+
+    pub fn ignore(&mut self, codes: &[CheckCode]) {
+        self.select.retain(|code| !codes.contains(code));
+    }
 }