diff --git a/modules/admin/blacklist.py b/modules/admin/blacklist.py
new file mode 100644
index 0000000..cace09b
--- /dev/null
+++ b/modules/admin/blacklist.py
@@ -0,0 +1,37 @@
+import discord
+from discord.ext import commands
+
+from lib.const import CONST
+from services.blacklist_service import BlacklistUserService
+from ui.embeds import Builder
+
+
+class Blacklist(commands.Cog):
+    def __init__(self, bot: commands.Bot):
+        self.bot = bot
+
+    @commands.command(name="blacklist")
+    @commands.is_owner()
+    async def blacklist_command(
+        self,
+        ctx: commands.Context[commands.Bot],
+        user: discord.User,
+        *,
+        reason: str | None = None,
+    ) -> None:
+        blacklist_service = BlacklistUserService(user.id)
+        blacklist_service.add_to_blacklist(reason)
+
+        embed = Builder.create_embed(
+            theme="success",
+            user_name=ctx.author.name,
+            author_text=CONST.STRINGS["admin_blacklist_author"],
+            description=CONST.STRINGS["admin_blacklist_description"].format(user.name),
+            footer_text=CONST.STRINGS["admin_blacklist_footer"],
+        )
+
+        await ctx.send(embed=embed)
+
+
+async def setup(bot: commands.Bot) -> None:
+    await bot.add_cog(Blacklist(bot))
diff --git a/services/blacklist_service.py b/services/blacklist_service.py
new file mode 100644
index 0000000..24220d2
--- /dev/null
+++ b/services/blacklist_service.py
@@ -0,0 +1,39 @@
+from db import database
+
+
+class BlacklistUserService:
+    def __init__(self, user_id: int) -> None:
+        self.user_id: int = user_id
+
+    def add_to_blacklist(self, reason: str | None = None) -> None:
+        """
+        Adds a user to the blacklist with the given reason.
+
+        Args:
+            reason (str): The reason for blacklisting the user.
+        """
+        query: str = """
+                INSERT INTO blacklist_user (user_id, reason)
+                VALUES (%s, %s)
+                ON DUPLICATE KEY UPDATE reason = VALUES(reason)
+                """
+        database.execute_query(query, (self.user_id, reason))
+
+    @staticmethod
+    def is_user_blacklisted(user_id: int) -> bool:
+        """
+        Checks if a user is currently blacklisted.
+
+        Args:
+            user_id (int): The ID of the user to check.
+
+        Returns:
+            bool: True if the user is blacklisted, False otherwise.
+        """
+        query: str = """
+                SELECT active
+                FROM blacklist_user
+                WHERE user_id = %s
+                """
+        result: list[tuple[bool]] = database.select_query(query, (user_id,))
+        return any(active for (active,) in result)