diff --git a/README.md b/README.md
index 12f22a7..9c2a0ed 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 
 This package contains a [Sphinx](http://www.sphinx-doc.org/en/master/) extension
 for producing proof, theorem, axiom, lemma, definition, criterion, remark, conjecture,
-corollary, algorithm, example, property, observation and proposition directives.
+corollary, algorithm, example, property, observation, proposition and assumption directives.
 
 
 ## Get started
diff --git a/docs/source/index.md b/docs/source/index.md
index 71dcf78..21ebe67 100644
--- a/docs/source/index.md
+++ b/docs/source/index.md
@@ -17,7 +17,7 @@ zreferences
 
 This package contains a [Sphinx](http://www.sphinx-doc.org/en/master/) extension
 for producing proof, theorem, axiom, lemma, definition, criterion, remark, conjecture,
-corollary, algorithm, example, property, observation and proposition directives.
+corollary, algorithm, example, property, observation, proposition and assumption directives.
 
 **Features**:
 
diff --git a/docs/source/syntax.md b/docs/source/syntax.md
index e430075..044c578 100644
--- a/docs/source/syntax.md
+++ b/docs/source/syntax.md
@@ -696,6 +696,43 @@ This is a dummy proposition directive.
 
 You can refer to a proposition using the `{prf:ref}` role like: ```{prf:ref}`my-proposition` ```, which will replace the reference with the proposition number like so: {prf:ref}`my-proposition`. When an explicit text is provided, this caption will serve as the title of the reference.
 
+
+### Assumptions
+
+An assumption directive can be included using the `prf:assumption` pattern. The directive is enumerated by default and can take in an optional title argument. The following options are also supported:
+
+* `label` : text
+
+	A unique identifier for your assumption that you can use to reference it with `{prf:ref}`. Cannot contain spaces or special characters.
+* `class` : text
+
+	Value of the assumption’s class attribute which can be used to add custom CSS or JavaScript.
+* `nonumber` : flag (empty)
+
+	Turns off assumption auto numbering.
+
+**Example**
+
+```{prf:assumption}
+:label: my-assumption
+
+This is a dummy assumption directive.
+```
+
+**MyST Syntax**
+
+``````md
+```{prf:assumption}
+:label: my-assumption
+
+This is a dummy assumption directive.
+```
+``````
+
+#### Referencing Assumptions
+
+You can refer to an assumption using the `{prf:ref}` role like: ```{prf:ref}`my-assumption` ```, which will replace the reference with the assumption number like so: {prf:ref}`my-assumption`. When an explicit text is provided, this caption will serve as the title of the reference.
+
 ## How to Hide Content
 
 Directive content can be hidden using the `dropdown` class which is available through [sphinx-togglebutton](https://sphinx-togglebutton.readthedocs.io/en/latest/). If your project utilizes the [MyST-NB](https://myst-nb.readthedocs.io/en/latest/) extension, there is no need to activate `sphinx-togglebutton` since it is already bundled with `MyST-NB`.
diff --git a/setup.py b/setup.py
index 4a16c5d..8975b4c 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,8 @@
 LONG_DESCRIPTION = """
 This package contains a [Sphinx](http://www.sphinx-doc.org/en/master/) extension
 for producing proof, theorem, axiom, lemma, definition, criterion, remark, conjecture,
-corollary, algorithm, example, property, observation and proposition directives.
+corollary, algorithm, example, property, observation, proposition, and
+assumption directives.
 
 This project is maintained and supported by [najuzilu](https://github.com/najuzilu).
 """
diff --git a/sphinx_proof/_static/proof.css b/sphinx_proof/_static/proof.css
index 51e0c9f..f975944 100644
--- a/sphinx_proof/_static/proof.css
+++ b/sphinx_proof/_static/proof.css
@@ -194,3 +194,14 @@ div.proposition {
 div.proposition p.admonition-title {
 	background-color: var(--note-title-color);
 }
+/*********************************************
+* Assumption *
+*********************************************/
+div.assumption {
+	border-color: var(--hint-border-color);
+	background-color: var(--hint-title-color);
+}
+
+div.assumption p.admonition-title {
+	background-color: var(--hint-title-color);
+}
diff --git a/sphinx_proof/nodes.py b/sphinx_proof/nodes.py
index 8e7a429..5f164ae 100644
--- a/sphinx_proof/nodes.py
+++ b/sphinx_proof/nodes.py
@@ -183,6 +183,10 @@ class unenumerable_node(nodes.Admonition, nodes.Element):
     pass
 
 
+class assumption_node(nodes.Admonition, nodes.Element):
+    pass
+
+
 NODE_TYPES = {
     "axiom": axiom_node,
     "theorem": theorem_node,
@@ -197,4 +201,5 @@ class unenumerable_node(nodes.Admonition, nodes.Element):
     "property": property_node,
     "observation": observation_node,
     "proposition": proposition_node,
+    "assumption": assumption_node,
 }
diff --git a/sphinx_proof/proof_type.py b/sphinx_proof/proof_type.py
index 12dafb2..9176e97 100644
--- a/sphinx_proof/proof_type.py
+++ b/sphinx_proof/proof_type.py
@@ -89,6 +89,12 @@ class PropositionDirective(ElementDirective):
     name = "proposition"
 
 
+class AssumptionDirective(ElementDirective):
+    """A custom assumption directive."""
+
+    name = "assumption"
+
+
 PROOF_TYPES = {
     "axiom": AxiomDirective,
     "theorem": TheoremDirective,
@@ -103,4 +109,5 @@ class PropositionDirective(ElementDirective):
     "property": PropertyDirective,
     "observation": ObservationDirective,
     "proposition": PropositionDirective,
+    "assumption": AssumptionDirective,
 }
diff --git a/sphinx_proof/translations/jsons/Assumption.json b/sphinx_proof/translations/jsons/Assumption.json
new file mode 100644
index 0000000..17e55b3
--- /dev/null
+++ b/sphinx_proof/translations/jsons/Assumption.json
@@ -0,0 +1 @@
+[{"language":"English","symbol":"en","text":"Assumption"}]