diff --git a/changelogs/fragments/49-collection-supported-ansible-core.yml b/changelogs/fragments/49-collection-supported-ansible-core.yml
new file mode 100644
index 00000000..ba5ba352
--- /dev/null
+++ b/changelogs/fragments/49-collection-supported-ansible-core.yml
@@ -0,0 +1,3 @@
+minor_changes:
+  - "Antsibull-docs now depends on `packaging <https://pypi.org/project/packaging/>`__ (https://github.com/ansible-community/antsibull-docs/pull/49)."
+  - "The collection index pages now contain the supported versions of ansible-core of the collection in case collection's ``meta/runtime.yml`` specifies ``requires_ansible`` (https://github.com/ansible-community/antsibull-docs/issues/48, https://github.com/ansible-community/antsibull-docs/pull/49)."
diff --git a/pyproject.toml b/pyproject.toml
index 808c4c61..1c6010a9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,6 +39,7 @@ antsibull-core = ">= 1.2.0, < 2.0.0"
 asyncio-pool = "*"
 docutils = "*"
 jinja2 = "*"
+packaging = "*"
 rstcheck = ">= 3.0.0, < 7.0.0"
 sphinx = "*"
 
diff --git a/src/antsibull_docs/data/docsite/plugins_by_collection.rst.j2 b/src/antsibull_docs/data/docsite/plugins_by_collection.rst.j2
index bb566dd2..09d86741 100644
--- a/src/antsibull_docs/data/docsite/plugins_by_collection.rst.j2
+++ b/src/antsibull_docs/data/docsite/plugins_by_collection.rst.j2
@@ -27,7 +27,7 @@ Collection version @{ collection_version }@
    :local:
    :depth: 1
 
-{% if collection_description or collection_authors or collection_links %}
+{% if collection_description or collection_authors or collection_links or requires_ansible %}
 Description
 -----------
 
@@ -43,6 +43,14 @@ Description
 {%     endfor %}
 {%   endif %}
 
+{%   if requires_ansible %}
+**Supported ansible-core versions:**
+
+{%     for part in requires_ansible %}
+* @{     part | rst_escape }@
+{%     endfor %}
+{%   endif %}
+
 {%   if collection_links %}
 .. raw:: html
 
diff --git a/src/antsibull_docs/docs_parsing/__init__.py b/src/antsibull_docs/docs_parsing/__init__.py
index 6a1e3a47..b99f4ac2 100644
--- a/src/antsibull_docs/docs_parsing/__init__.py
+++ b/src/antsibull_docs/docs_parsing/__init__.py
@@ -69,10 +69,15 @@ def _get_environment(collection_dir: t.Optional[str]) -> t.Dict[str, str]:
 class AnsibleCollectionMetadata:
     path: str
     version: t.Optional[str]
+    requires_ansible: t.Optional[str]
 
-    def __init__(self, path: str, version: t.Optional[str]):
+    def __init__(self,
+                 path: str,
+                 version: t.Optional[str] = None,
+                 requires_ansible: t.Optional[str] = None):
         self.path = path
         self.version = version
+        self.requires_ansible = requires_ansible
 
     def __repr__(self):
         return f'AnsibleCollectionMetadata({repr(self.path)}, {repr(self.version)})'
diff --git a/src/antsibull_docs/docs_parsing/ansible_doc.py b/src/antsibull_docs/docs_parsing/ansible_doc.py
index 00636a4f..c4ab64b3 100644
--- a/src/antsibull_docs/docs_parsing/ansible_doc.py
+++ b/src/antsibull_docs/docs_parsing/ansible_doc.py
@@ -230,7 +230,8 @@ def get_collection_metadata(venv: t.Union['VenvRunner', 'FakeVenvRunner'],
     raw_result = ansible_collection_list_cmd.stdout.decode('utf-8', errors='surrogateescape')
     collection_list = parse_ansible_galaxy_collection_list(raw_result, collection_names)
     for namespace, name, path, version in collection_list:
-        collection_metadata[f'{namespace}.{name}'] = AnsibleCollectionMetadata(
+        collection_name = f'{namespace}.{name}'
+        collection_metadata[collection_name] = AnsibleCollectionMetadata(
             path=path, version=version)
 
     return collection_metadata
diff --git a/src/antsibull_docs/docs_parsing/routing.py b/src/antsibull_docs/docs_parsing/routing.py
index a392a95e..deabeae4 100644
--- a/src/antsibull_docs/docs_parsing/routing.py
+++ b/src/antsibull_docs/docs_parsing/routing.py
@@ -189,7 +189,14 @@ def remove_flatmapping_artifacts(plugin_routing: t.Dict[str, t.Dict[str, t.Dict[
                         plugin_routing_type.pop(plugin_name, None)
 
 
-def calculate_meta_runtime(collection_name, collection_metadata):
+def load_meta_runtime(collection_name: str,
+                      collection_metadata: AnsibleCollectionMetadata) -> t.Mapping[str, t.Any]:
+    '''
+    Load meta/runtime.yml for collections, and ansible_builtin_runtime.yml for ansible-core.
+
+    Also extracts additional metadata stored in meta/runtime.yml, like requires_ansible,
+    and stores it in collection_metadata
+    '''
     if collection_name == 'ansible.builtin':
         meta_runtime_path = os.path.join(
             collection_metadata.path, 'config', 'ansible_builtin_runtime.yml')
@@ -201,6 +208,11 @@ def calculate_meta_runtime(collection_name, collection_metadata):
     else:
         meta_runtime = {}
 
+    if collection_name != 'ansible.builtin':
+        requires_ansible = meta_runtime.get('requires_ansible')
+        if isinstance(requires_ansible, str):
+            collection_metadata.requires_ansible = requires_ansible
+
     return meta_runtime
 
 
@@ -210,7 +222,7 @@ async def load_collection_routing(collection_name: str,
     """
     Load plugin routing for a collection.
     """
-    meta_runtime = calculate_meta_runtime(collection_name, collection_metadata)
+    meta_runtime = load_meta_runtime(collection_name, collection_metadata)
     plugin_routing_out: t.Dict[str, t.Dict[str, t.Dict[str, t.Any]]] = {}
     plugin_routing_in = meta_runtime.get('plugin_routing') or {}
     for plugin_type in DOCUMENTABLE_PLUGINS:
diff --git a/src/antsibull_docs/write_docs.py b/src/antsibull_docs/write_docs.py
index 5d36ace3..1bf1175a 100644
--- a/src/antsibull_docs/write_docs.py
+++ b/src/antsibull_docs/write_docs.py
@@ -13,6 +13,7 @@
 import asyncio_pool  # type: ignore[import]
 
 from jinja2 import Template
+from packaging.specifiers import SpecifierSet
 
 from antsibull_core import app_context
 from antsibull_core.logging import log
@@ -602,6 +603,29 @@ async def write_plugin_type_index(plugin_type: str,
     await write_file(dest_filename, index_contents)
 
 
+def _parse_required_ansible(requires_ansible: str) -> t.List[str]:
+    result = []
+    for specifier in reversed(sorted(
+        SpecifierSet(requires_ansible),
+        key=lambda specifier: (specifier.operator, specifier.version)
+    )):
+        if specifier.operator == '>=':
+            result.append(f'{specifier.version} or newer')
+        elif specifier.operator == '>':
+            result.append(f'newer than {specifier.version}')
+        elif specifier.operator == '<=':
+            result.append(f'{specifier.version} or older')
+        elif specifier.operator == '<':
+            result.append(f'older than {specifier.version}')
+        elif specifier.operator == '!=':
+            result.append(f'version {specifier.version} is specifically not supported')
+        elif specifier.operator == '==':
+            result.append(f'version {specifier.version} is specifically supported')
+        else:
+            result.append(f'{specifier.operator} {specifier.version}')
+    return result
+
+
 async def write_plugin_lists(collection_name: str,
                              plugin_maps: t.Mapping[str, t.Mapping[str, str]],
                              template: Template,
@@ -627,12 +651,28 @@ async def write_plugin_lists(collection_name: str,
     :kwarg for_official_docsite: Default False.  Set to True to use wording specific for the
         official docsite on docs.ansible.com.
     """
+    flog = mlog.fields(func='write_plugin_lists')
+    flog.debug('Enter')
+
+    requires_ansible = []
+    if collection_name != 'ansible.builtin' and collection_meta.requires_ansible:
+        try:
+            requires_ansible = _parse_required_ansible(collection_meta.requires_ansible)
+        except Exception as exc:  # pylint:disable=broad-except
+            flog.fields(
+                collection_name=collection_name,
+                exception=exc,
+            ).error(
+                'Cannot parse required_ansible specifier set for {collection_name}',
+                collection_name=collection_name,
+            )
     index_contents = _render_template(
         template,
         dest_dir,
         collection_name=collection_name,
         plugin_maps=plugin_maps,
         collection_version=collection_meta.version,
+        requires_ansible=requires_ansible,
         link_data=link_data,
         breadcrumbs=breadcrumbs,
         extra_docs_sections=extra_docs_data[0],
@@ -650,6 +690,8 @@ async def write_plugin_lists(collection_name: str,
 
     await write_file(index_file, index_contents)
 
+    flog.debug('Leave')
+
 
 async def output_collection_index(collection_to_plugin_info: CollectionInfoT,
                                   collection_namespaces: t.Mapping[str, t.List[str]],
diff --git a/tests/functional/baseline-default/collections/ns/col1/index.rst b/tests/functional/baseline-default/collections/ns/col1/index.rst
index f8d0d6dd..72a3e08b 100644
--- a/tests/functional/baseline-default/collections/ns/col1/index.rst
+++ b/tests/functional/baseline-default/collections/ns/col1/index.rst
@@ -25,6 +25,7 @@ A short description.
 
 
 
+
 .. toctree::
     :maxdepth: 1
 
diff --git a/tests/functional/baseline-default/collections/ns/col2/index.rst b/tests/functional/baseline-default/collections/ns/col2/index.rst
index b395e8ad..2259e71b 100644
--- a/tests/functional/baseline-default/collections/ns/col2/index.rst
+++ b/tests/functional/baseline-default/collections/ns/col2/index.rst
@@ -20,6 +20,10 @@ Description
 
 * Ansible (https://github.com/ansible)
 
+**Supported ansible-core versions:**
+
+* newer than 2.11.0
+
 
 
 
diff --git a/tests/functional/baseline-default/collections/ns2/col/index.rst b/tests/functional/baseline-default/collections/ns2/col/index.rst
index 05a43cc3..4fa9cf5c 100644
--- a/tests/functional/baseline-default/collections/ns2/col/index.rst
+++ b/tests/functional/baseline-default/collections/ns2/col/index.rst
@@ -24,6 +24,12 @@ With multiple paragraphs.
 
 * Ansible (https://github.com/ansible)
 
+**Supported ansible-core versions:**
+
+* 2.11.0 or newer
+* older than 2.99.0
+* version 2.12.2 is specifically not supported
+
 .. raw:: html
 
   <p class="ansible-links">
diff --git a/tests/functional/baseline-no-breadcrumbs/collections/ns/col1/index.rst b/tests/functional/baseline-no-breadcrumbs/collections/ns/col1/index.rst
index 8b50b03a..f1af8db9 100644
--- a/tests/functional/baseline-no-breadcrumbs/collections/ns/col1/index.rst
+++ b/tests/functional/baseline-no-breadcrumbs/collections/ns/col1/index.rst
@@ -26,6 +26,7 @@ A short description.
 
 
 
+
 .. toctree::
     :maxdepth: 1
 
diff --git a/tests/functional/baseline-no-breadcrumbs/collections/ns/col2/index.rst b/tests/functional/baseline-no-breadcrumbs/collections/ns/col2/index.rst
index f8f414da..c2133f88 100644
--- a/tests/functional/baseline-no-breadcrumbs/collections/ns/col2/index.rst
+++ b/tests/functional/baseline-no-breadcrumbs/collections/ns/col2/index.rst
@@ -21,6 +21,10 @@ Description
 
 * Ansible (https://github.com/ansible)
 
+**Supported ansible-core versions:**
+
+* newer than 2.11.0
+
 
 
 
diff --git a/tests/functional/baseline-no-breadcrumbs/collections/ns2/col/index.rst b/tests/functional/baseline-no-breadcrumbs/collections/ns2/col/index.rst
index ee52fc24..58f0a13f 100644
--- a/tests/functional/baseline-no-breadcrumbs/collections/ns2/col/index.rst
+++ b/tests/functional/baseline-no-breadcrumbs/collections/ns2/col/index.rst
@@ -25,6 +25,12 @@ With multiple paragraphs.
 
 * Ansible (https://github.com/ansible)
 
+**Supported ansible-core versions:**
+
+* 2.11.0 or newer
+* older than 2.99.0
+* version 2.12.2 is specifically not supported
+
 .. raw:: html
 
   <p class="ansible-links">
diff --git a/tests/functional/baseline-no-indexes/collections/ns/col1/index.rst b/tests/functional/baseline-no-indexes/collections/ns/col1/index.rst
index f8d0d6dd..72a3e08b 100644
--- a/tests/functional/baseline-no-indexes/collections/ns/col1/index.rst
+++ b/tests/functional/baseline-no-indexes/collections/ns/col1/index.rst
@@ -25,6 +25,7 @@ A short description.
 
 
 
+
 .. toctree::
     :maxdepth: 1
 
diff --git a/tests/functional/baseline-no-indexes/collections/ns/col2/index.rst b/tests/functional/baseline-no-indexes/collections/ns/col2/index.rst
index b395e8ad..2259e71b 100644
--- a/tests/functional/baseline-no-indexes/collections/ns/col2/index.rst
+++ b/tests/functional/baseline-no-indexes/collections/ns/col2/index.rst
@@ -20,6 +20,10 @@ Description
 
 * Ansible (https://github.com/ansible)
 
+**Supported ansible-core versions:**
+
+* newer than 2.11.0
+
 
 
 
diff --git a/tests/functional/baseline-no-indexes/collections/ns2/col/index.rst b/tests/functional/baseline-no-indexes/collections/ns2/col/index.rst
index 05a43cc3..4fa9cf5c 100644
--- a/tests/functional/baseline-no-indexes/collections/ns2/col/index.rst
+++ b/tests/functional/baseline-no-indexes/collections/ns2/col/index.rst
@@ -24,6 +24,12 @@ With multiple paragraphs.
 
 * Ansible (https://github.com/ansible)
 
+**Supported ansible-core versions:**
+
+* 2.11.0 or newer
+* older than 2.99.0
+* version 2.12.2 is specifically not supported
+
 .. raw:: html
 
   <p class="ansible-links">
diff --git a/tests/functional/baseline-squash-hierarchy/index.rst b/tests/functional/baseline-squash-hierarchy/index.rst
index 05a43cc3..4fa9cf5c 100644
--- a/tests/functional/baseline-squash-hierarchy/index.rst
+++ b/tests/functional/baseline-squash-hierarchy/index.rst
@@ -24,6 +24,12 @@ With multiple paragraphs.
 
 * Ansible (https://github.com/ansible)
 
+**Supported ansible-core versions:**
+
+* 2.11.0 or newer
+* older than 2.99.0
+* version 2.12.2 is specifically not supported
+
 .. raw:: html
 
   <p class="ansible-links">
diff --git a/tests/functional/baseline-use-html-blobs/collections/ns2/col/index.rst b/tests/functional/baseline-use-html-blobs/collections/ns2/col/index.rst
index 05a43cc3..4fa9cf5c 100644
--- a/tests/functional/baseline-use-html-blobs/collections/ns2/col/index.rst
+++ b/tests/functional/baseline-use-html-blobs/collections/ns2/col/index.rst
@@ -24,6 +24,12 @@ With multiple paragraphs.
 
 * Ansible (https://github.com/ansible)
 
+**Supported ansible-core versions:**
+
+* 2.11.0 or newer
+* older than 2.99.0
+* version 2.12.2 is specifically not supported
+
 .. raw:: html
 
   <p class="ansible-links">