diff --git a/backend/apps/slack/admin/__init__.py b/backend/apps/slack/admin/__init__.py
index b3193ffb04..14cf601bfc 100644
--- a/backend/apps/slack/admin/__init__.py
+++ b/backend/apps/slack/admin/__init__.py
@@ -1,6 +1,7 @@
 """Slack app admin."""
 
 from .conversation import ConversationAdmin
+from .entity_channel import EntityChannelAdmin
 from .event import EventAdmin
 from .member import MemberAdmin
 from .message import MessageAdmin
diff --git a/backend/apps/slack/admin/entity_channel.py b/backend/apps/slack/admin/entity_channel.py
new file mode 100644
index 0000000000..4b114539c1
--- /dev/null
+++ b/backend/apps/slack/admin/entity_channel.py
@@ -0,0 +1,36 @@
+"""Admin configuration for the EntityChannel model."""
+
+from django.contrib import admin, messages
+
+from apps.slack.models import EntityChannel
+
+
+@admin.action(description="Mark selected EntityChannels as reviewed")
+def mark_as_reviewed(_modeladmin, request, queryset):
+    """Admin action to mark selected EntityChannels as reviewed."""
+    messages.success(
+        request,
+        f"Marked {queryset.update(is_reviewed=True)} EntityChannel(s) as reviewed.",
+    )
+
+
+@admin.register(EntityChannel)
+class EntityChannelAdmin(admin.ModelAdmin):
+    """Admin interface for the EntityChannel model."""
+
+    actions = (mark_as_reviewed,)
+    list_display = (
+        "entity",
+        "channel",
+        "is_default",
+        "is_reviewed",
+        "platform",
+    )
+    list_filter = (
+        "is_default",
+        "is_reviewed",
+        "platform",
+        "entity_type",
+        "channel_type",
+    )
+    search_fields = ("channel_id", "entity_id")
diff --git a/backend/apps/slack/management/commands/owasp_match_channels.py b/backend/apps/slack/management/commands/owasp_match_channels.py
new file mode 100644
index 0000000000..c049296562
--- /dev/null
+++ b/backend/apps/slack/management/commands/owasp_match_channels.py
@@ -0,0 +1,42 @@
+"""A command to populate EntityChannel records from Slack data."""
+
+from django.contrib.contenttypes.models import ContentType
+from django.core.management.base import BaseCommand
+from django.utils.text import slugify
+
+from apps.owasp.models.chapter import Chapter
+from apps.owasp.models.committee import Committee
+from apps.owasp.models.project import Project
+from apps.slack.models import Conversation, EntityChannel
+
+
+class Command(BaseCommand):
+    help = "Populate EntityChannel links for Chapters, Committees, and Projects."
+
+    def handle(self, *args, **options):
+        created = 0
+        for model in (Chapter, Committee, Project):
+            content_type = ContentType.objects.get_for_model(model)
+            # Use .only and .iterator for memory efficiency
+            for entity in model.objects.all().only("id", "name").iterator():
+                # Normalize the name for matching (e.g., "OWASP Lima" -> "owasp-lima")
+                needle = slugify(entity.name or "")
+                if not needle:
+                    continue
+                qs = Conversation.objects.all()
+                conversations = qs.filter(name__icontains=needle)
+                for conv in conversations:
+                    _, was_created = EntityChannel.objects.get_or_create(
+                        entity_id=entity.pk,
+                        entity_type=content_type,
+                        channel_id=conv.pk,
+                        channel_type=ContentType.objects.get_for_model(Conversation),
+                        defaults={
+                            "is_default": False,
+                            "is_reviewed": False,
+                            "platform": EntityChannel.Platform.SLACK,
+                        },
+                    )
+                    if was_created:
+                        created += 1
+        self.stdout.write(self.style.SUCCESS(f"Created {created} EntityChannel records."))
diff --git a/backend/apps/slack/migrations/0019_entitychannel.py b/backend/apps/slack/migrations/0019_entitychannel.py
new file mode 100644
index 0000000000..49ae3a335c
--- /dev/null
+++ b/backend/apps/slack/migrations/0019_entitychannel.py
@@ -0,0 +1,70 @@
+# Generated by Django 5.2.5 on 2025-08-15 22:35
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("contenttypes", "0002_remove_content_type_name"),
+        ("slack", "0018_conversation_sync_messages"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="EntityChannel",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True, primary_key=True, serialize=False, verbose_name="ID"
+                    ),
+                ),
+                ("channel_id", models.PositiveBigIntegerField()),
+                ("entity_id", models.PositiveBigIntegerField()),
+                (
+                    "is_default",
+                    models.BooleanField(
+                        default=False,
+                        help_text="Indicates if this is the main channel for the entity",
+                    ),
+                ),
+                (
+                    "is_reviewed",
+                    models.BooleanField(
+                        default=False, help_text="Indicates if the channel has been reviewed"
+                    ),
+                ),
+                (
+                    "platform",
+                    models.CharField(
+                        choices=[("slack", "Slack")],
+                        default="slack",
+                        help_text="Platform of the channel (e.g., Slack)",
+                        max_length=32,
+                    ),
+                ),
+                (
+                    "channel_type",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="+",
+                        to="contenttypes.contenttype",
+                    ),
+                ),
+                (
+                    "entity_type",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="+",
+                        to="contenttypes.contenttype",
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "Entity channel",
+                "verbose_name_plural": "Entity channels",
+                "unique_together": {("channel_id", "channel_type", "entity_id", "entity_type")},
+            },
+        ),
+    ]
diff --git a/backend/apps/slack/models/__init__.py b/backend/apps/slack/models/__init__.py
index 3bbe0878de..7a0db8c927 100644
--- a/backend/apps/slack/models/__init__.py
+++ b/backend/apps/slack/models/__init__.py
@@ -1,4 +1,5 @@
 from .conversation import Conversation
+from .entity_channel import EntityChannel
 from .event import Event
 from .member import Member
 from .message import Message
diff --git a/backend/apps/slack/models/entity_channel.py b/backend/apps/slack/models/entity_channel.py
new file mode 100644
index 0000000000..42bcd21d5b
--- /dev/null
+++ b/backend/apps/slack/models/entity_channel.py
@@ -0,0 +1,59 @@
+"""Model for linking OWASP entities (chapter, committee, project) to communication channels."""
+
+from django.contrib.contenttypes.fields import GenericForeignKey
+from django.contrib.contenttypes.models import ContentType
+from django.db import models
+
+
+class EntityChannel(models.Model):
+    """Model representing a link between an entity and a channel."""
+
+    class Platform(models.TextChoices):
+        SLACK = "slack", "Slack"
+
+    class Meta:
+        unique_together = (
+            "channel_id",
+            "channel_type",
+            "entity_id",
+            "entity_type",
+        )
+        verbose_name = "Entity channel"
+        verbose_name_plural = "Entity channels"
+
+    # Channel.
+    channel = GenericForeignKey("channel_type", "channel_id")
+    channel_id = models.PositiveBigIntegerField()
+    channel_type = models.ForeignKey(
+        ContentType,
+        on_delete=models.CASCADE,
+        related_name="+",
+    )
+
+    # Entity.
+    entity = GenericForeignKey("entity_type", "entity_id")
+    entity_id = models.PositiveBigIntegerField()
+    entity_type = models.ForeignKey(
+        ContentType,
+        on_delete=models.CASCADE,
+        related_name="+",
+    )
+
+    is_default = models.BooleanField(
+        default=False,
+        help_text="Indicates if this is the main channel for the entity",
+    )
+    is_reviewed = models.BooleanField(
+        default=False,
+        help_text="Indicates if the channel has been reviewed",
+    )
+    platform = models.CharField(
+        max_length=32,
+        default=Platform.SLACK,
+        choices=Platform.choices,
+        help_text="Platform of the channel (e.g., Slack)",
+    )
+
+    def __str__(self):
+        """Return a readable string representation of the EntityChannel."""
+        return f"{self.entity} - {self.channel} ({self.platform})"