Related category on a single page
When you set up your category, you check the Categories in this group have their own URLs box, and you give the category a URL (suppose it is category/{slug}), and a template (suppose it is category/_entry). Now in the category/_entry.html template, category will be defined (the way entry is defined on the template for a section entry).

How do I list the entries related to a category? (tucked away in the Get Help section of the Craft website) describes how to fetch and list the entries related to a category:

{# Fetch all of the entries related to this category #}
{% set entries = craft.entries.relatedTo(category) %}

{# Output them #}
{% for entry in entries %}
    &lt;a href="{{ entry.url }}"&gt;{{ entry.title }}&lt;/a&gt;
{% endfor %}


If you want to narrow the entries down to a single section, then fetch them like this:

{% set entries = craft.entries.section('mySectionHandle').relatedTo(category) %}