diff --git a/Cargo.lock b/Cargo.lock
index dbbfa8b41..07396ff49 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5095,11 +5095,11 @@ dependencies = [
  "toml",
  "tracing",
  "url",
- "uv-dirs",
  "uv-keyring",
  "uv-once-map",
  "uv-redacted",
  "uv-small-str",
+ "uv-state",
  "uv-static",
  "uv-warnings",
  "wiremock",
diff --git a/crates/uv-auth/Cargo.toml b/crates/uv-auth/Cargo.toml
index 327e6c487..cf28700f2 100644
--- a/crates/uv-auth/Cargo.toml
+++ b/crates/uv-auth/Cargo.toml
@@ -10,12 +10,12 @@ doctest = false
 workspace = true
 
 [dependencies]
-uv-dirs = { workspace = true }
 uv-keyring = { workspace = true, features = ["apple-native", "secret-service", "windows-native"] }
 uv-once-map = { workspace = true }
 uv-redacted = { workspace = true }
 uv-small-str = { workspace = true }
 uv-static = { workspace = true }
+uv-state = { workspace = true }
 uv-warnings = { workspace = true }
 
 anyhow = { workspace = true }
diff --git a/crates/uv-auth/src/middleware.rs b/crates/uv-auth/src/middleware.rs
index 5e3350e96..46bffb1d6 100644
--- a/crates/uv-auth/src/middleware.rs
+++ b/crates/uv-auth/src/middleware.rs
@@ -65,25 +65,25 @@ impl Default for TextStoreMode {
         // TODO(zanieb): Reconsider this pattern. We're just mirroring the [`NetrcMode`]
         // implementation for now.
         Self::Automatic(LazyLock::new(|| {
-            let state_dir = uv_dirs::user_state_dir()?;
-            let credentials_path = state_dir.join("credentials").join("credentials.toml");
+            let path = TextCredentialStore::default_file()
+                .inspect_err(|err| {
+                    warn!("Failed to determine credentials file path: {}", err);
+                })
+                .ok()?;
 
-            match TextCredentialStore::from_file(&credentials_path) {
+            match TextCredentialStore::from_file(&path) {
                 Ok(store) => {
-                    debug!("Loaded credential file {}", credentials_path.display());
+                    debug!("Loaded credential file {}", path.display());
                     Some(store)
                 }
                 Err(TomlCredentialError::Io(err)) if err.kind() == std::io::ErrorKind::NotFound => {
-                    debug!(
-                        "No credentials file found at {}",
-                        credentials_path.display()
-                    );
+                    debug!("No credentials file found at {}", path.display());
                     None
                 }
                 Err(err) => {
                     warn!(
                         "Failed to load credentials from {}: {}",
-                        credentials_path.display(),
+                        path.display(),
                         err
                     );
                     None
diff --git a/crates/uv-auth/src/store.rs b/crates/uv-auth/src/store.rs
index d06ff0d13..dd3bbbd3e 100644
--- a/crates/uv-auth/src/store.rs
+++ b/crates/uv-auth/src/store.rs
@@ -9,6 +9,9 @@ use tracing::debug;
 use url::Url;
 use uv_redacted::DisplaySafeUrl;
 
+use uv_state::{StateBucket, StateStore};
+use uv_static::EnvVars;
+
 use crate::Credentials;
 use crate::credentials::{Password, Username};
 use crate::realm::Realm;
@@ -182,12 +185,22 @@ pub struct TextCredentialStore {
 }
 
 impl TextCredentialStore {
-    /// Return the default credential file path.
+    /// Return the directory for storing credentials.
+    fn directory_path() -> Result<PathBuf, TomlCredentialError> {
+        if let Some(dir) = std::env::var_os(EnvVars::UV_CREDENTIALS_DIR)
+            .filter(|s| !s.is_empty())
+            .map(PathBuf::from)
+        {
+            return Ok(dir);
+        }
+
+        Ok(StateStore::from_settings(None)?.bucket(StateBucket::Credentials))
+    }
+
+    /// Return the standard file path for storing credentials.
     pub fn default_file() -> Result<PathBuf, TomlCredentialError> {
-        let state_dir =
-            uv_dirs::user_state_dir().ok_or(TomlCredentialError::CredentialsDirError)?;
-        let credentials_dir = state_dir.join("credentials");
-        Ok(credentials_dir.join("credentials.toml"))
+        let dir = Self::directory_path()?;
+        Ok(dir.join("credentials.toml"))
     }
 
     /// Read credentials from a file.
diff --git a/crates/uv-static/src/env_vars.rs b/crates/uv-static/src/env_vars.rs
index e6427c0f3..4419a7eeb 100644
--- a/crates/uv-static/src/env_vars.rs
+++ b/crates/uv-static/src/env_vars.rs
@@ -45,6 +45,9 @@ impl EnvVars {
     /// directory for caching instead of the default cache directory.
     pub const UV_CACHE_DIR: &'static str = "UV_CACHE_DIR";
 
+    /// The directory for storage of credentials when using a plain text backend.
+    pub const UV_CREDENTIALS_DIR: &'static str = "UV_CREDENTIALS_DIR";
+
     /// Equivalent to the `--no-cache` command-line argument. If set, uv will not use the
     /// cache for any operations.
     pub const UV_NO_CACHE: &'static str = "UV_NO_CACHE";
diff --git a/docs/reference/environment.md b/docs/reference/environment.md
index 3b017178d..00cd39760 100644
--- a/docs/reference/environment.md
+++ b/docs/reference/environment.md
@@ -55,6 +55,10 @@ local `uv.toml` file to use as the configuration file.
 Equivalent to the `--constraint` command-line argument. If set, uv will use this
 file as the constraints file. Uses space-separated list of files.
 
+### `UV_CREDENTIALS_DIR`
+
+The directory for storage of credentials when using a plain text backend.
+
 ### `UV_CUSTOM_COMPILE_COMMAND`
 
 Equivalent to the `--custom-compile-command` command-line argument.