diff --git a/Cargo.lock b/Cargo.lock
index 99ac82a1d8..7465f76b30 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -104,6 +104,7 @@ dependencies = [
 [[package]]
 name = "redox_users"
 version = "0.1.0"
+source = "git+https://github.com/redox-os/users.git#50f4022e6c713a131bbbfde360cb0f369e96c672"
 dependencies = [
  "argon2rs 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "extra 0.1.0 (git+https://github.com/redox-os/libextra.git)",
@@ -141,7 +142,7 @@ dependencies = [
  "rand 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_users 0.1.0",
+ "redox_users 0.1.0 (git+https://github.com/redox-os/users.git)",
  "termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -161,6 +162,7 @@ dependencies = [
 "checksum rand 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)" = "6475140dfd8655aeb72e1fd4b7a1cc1c202be65d71669476e392fe62532b9edd"
 "checksum redox_syscall 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)" = "8dde11f18c108289bef24469638a04dce49da56084f2d50618b226e47eb04509"
 "checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
+"checksum redox_users 0.1.0 (git+https://github.com/redox-os/users.git)" = "<none>"
 "checksum scoped_threadpool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "4ea459fe3ceff01e09534847c49860891d3ff1c12b4eb7731b67f2778fb60190"
 "checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
 "checksum unicode-width 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "bf3a113775714a22dcb774d8ea3655c53a32debae63a063acc00a91cc586245f"
diff --git a/Cargo.toml b/Cargo.toml
index 9bd6388f3f..652998ea8c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,6 +30,10 @@ path = "src/bin/su.rs"
 name = "sudo"
 path = "src/bin/sudo.rs"
 
+[[bin]]
+name = "useradd"
+path = "src/bin/useradd.rs"
+
 [[bin]]
 name = "whoami"
 path = "src/bin/whoami.rs"
diff --git a/src/bin/groupadd.rs b/src/bin/groupadd.rs
index 252f6c9862..91ee1e23b7 100644
--- a/src/bin/groupadd.rs
+++ b/src/bin/groupadd.rs
@@ -1,4 +1,4 @@
-#[deny(dead_code)]
+#![deny(warnings)]
 
 extern crate arg_parser;
 extern crate extra;
@@ -26,7 +26,6 @@ DESCRIPTION
     passed on the command line and system defaults.
 
 OPTIONS
-    
     -f, --force
         Simply forces the exit status of the program to 0
         even if the group already exists. A message is still
@@ -73,14 +72,12 @@ fn main() {
     
     match add_group(groupname, gid, &[""]) {
         Ok(_) => {},
+        Err(ref err) if err.kind() == io::ErrorKind::AlreadyExists && parser.found("force") => {
+            exit(0);
+        },
         Err(err) => {
             eprintln!("groupadd: {}: group {}", err, groupname);
-            let msg = format!("{}", err);
-            if parser.found("force") && msg == "user already exists" {
-                exit(0);
-            } else {
-                exit(1);
-            }
+            exit(1);
         }
     }
 }
diff --git a/src/bin/login.rs b/src/bin/login.rs
index 84f06fd34b..4c96687652 100644
--- a/src/bin/login.rs
+++ b/src/bin/login.rs
@@ -114,4 +114,3 @@ pub fn main() {
         }
     }
 }
-
diff --git a/src/bin/passwd.rs b/src/bin/passwd.rs
index 46064b32b7..8d2f088060 100644
--- a/src/bin/passwd.rs
+++ b/src/bin/passwd.rs
@@ -1,4 +1,4 @@
-#![deny(dead_code)]
+#![deny(warnings)]
 
 extern crate arg_parser;
 extern crate extra;
diff --git a/src/bin/sudo.rs b/src/bin/sudo.rs
index 0801a1965f..07d6c54fb2 100644
--- a/src/bin/sudo.rs
+++ b/src/bin/sudo.rs
@@ -150,4 +150,4 @@ fn run_command_as_root(cmd: &str, args: &Vec<String>) {
             exit(1);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/bin/useradd.rs b/src/bin/useradd.rs
new file mode 100644
index 0000000000..ba15ccd928
--- /dev/null
+++ b/src/bin/useradd.rs
@@ -0,0 +1,170 @@
+#![deny(warnings)]
+
+extern crate arg_parser;
+extern crate redox_users;
+
+use std::{env, io};
+use std::io::Write;
+use std::fs::DirBuilder;
+use std::os::unix::fs::DirBuilderExt;
+use std::process::exit;
+
+use arg_parser::ArgParser;
+use redox_users::{add_group, add_user, get_unique_group_id, get_unique_user_id};
+
+const MAN_PAGE: &'static str = /* @MANSTART{useradd} */ r#"
+NAME
+    useradd - add a new user
+
+SYNOPSYS
+    useradd [ options ] LOGIN
+    useradd [ -h | --help ]
+
+DESCRIPTION
+    The useradd utility creates a new user based on
+    system defaults and values passed on the command line.
+    
+    Useradd creates a new group for the user by default and
+    can also be instructed to create the user's home directory.
+
+OPTIONS
+    -h, --help
+        Display this help and exit.
+
+    -c, --comment
+        Any text string, usually used as the user's full name.
+
+    -d, --home-dir HOME_DIR
+        The new user will be created with HOME_DIR as their home
+        directory. The default value is LOGIN prepended with "/home".
+        This flag DOES NOT create the home directory. See --create-home.
+
+    -m, --create-home
+        Creates the user's home directory if it does not already exist.
+        
+        This option is not enabled by default. This option must be specified
+        for a home directory to be created.
+
+    -N, --no-user-group
+        Do not attempt to create the user's user group.
+
+    -s, --shell SHELL
+        The path to the user's default login shell. If left blank, the
+        default shell is set as /bin/ion
+
+AUTHORS
+    Written by Wesley Hershberger.
+"#; /* @MANEND */
+const DEFAULT_SHELL: &'static str = "/bin/ion";
+const DEFAULT_HOME: &'static str = "/home";
+const DEFAULT_MODE: u32 = 0o700;
+
+fn main() {
+    let mut stdout = io::stdout();
+    
+    let mut parser = ArgParser::new(1)
+        .add_flag(&["h", "help"])
+        .add_opt("c", "comment")
+        .add_opt("d", "home-dir")
+        .add_flag(&["m", "create-home"])
+        .add_flag(&["N", "no-user-group"])
+        .add_opt("s", "shell");
+    parser.parse(env::args());
+    
+    if parser.found("help") {
+        stdout.write_all(MAN_PAGE.as_bytes()).unwrap();
+        stdout.flush().unwrap();
+        exit(0);
+    }
+    
+    let login = if parser.args.is_empty() {
+        eprintln!("useradd: no login specified");
+        exit(1);
+    } else {
+        &parser.args[0]
+    };
+    
+    let uid = match get_unique_user_id() {
+        Some(id) => id,
+        None => {
+            eprintln!("useradd: no available uid");
+            exit(1);
+        }
+    };
+    
+    let gid = match get_unique_group_id() {
+        Some(id) => id,
+        None => {
+            eprintln!("useradd: no available gid");
+            exit(1);
+        }
+    };
+    
+    let username = if parser.found("comment") {
+        match parser.get_opt("comment") {
+            Some(user) => user,
+            None => {
+                eprintln!("useradd: invalid argument: -c");
+                exit(1);
+            }
+        }
+    } else {
+        login.to_owned()
+    };
+    
+    let userhome = if parser.found("home-dir") {
+        match parser.get_opt("home-dir") {
+            Some(dir) => dir,
+            None => {
+                eprintln!("useradd: invalid argument: -d");
+                exit(1);
+            }
+        }
+    } else {
+        format!("{}/{}", DEFAULT_HOME, login)
+    };
+    
+    let shell = if parser.found("shell") {
+        match parser.get_opt("shell") {
+            Some(sh) => sh,
+            None => {
+                eprintln!("useradd: invalid argument: -s");
+                exit(1);
+            }
+        }
+    } else {
+        DEFAULT_SHELL.to_string()
+    };
+    
+    if !parser.found("no-user-group") {
+        match add_group(login, gid, &[login]) {
+            Ok(_) => {},
+            Err(err) => {
+                eprintln!("useradd: error creating group {}: {}", login, err);
+                exit(1);
+            }
+        }
+    }
+    
+    match add_user(login, uid, gid, username.as_str(), userhome.as_str(), shell.as_str()) {
+        Ok(_) => {},
+        Err(err) => {
+            eprintln!("useradd: {}: {}", err, login);
+            exit(1);
+        }
+    }
+    
+    if parser.found("create-home") {
+        let mut builder = DirBuilder::new();
+        builder.mode(DEFAULT_MODE);
+        
+        match builder.create(&userhome) {
+            Ok(_) => {},
+            Err(ref err) if err.kind() == io::ErrorKind::AlreadyExists => {},
+            Err(err) => {
+                eprintln!("useradd: failed to create home dir: {}", err);
+                exit(1);
+            }
+        };
+    }
+}