diff --git a/stix2/v21/__init__.py b/stix2/v21/__init__.py
index 81ab980..be7e343 100644
--- a/stix2/v21/__init__.py
+++ b/stix2/v21/__init__.py
@@ -36,7 +36,7 @@ from .observables import (
 )
 from .sdo import (
     AttackPattern, Campaign, CourseOfAction, CustomObject, Grouping, Identity,
-    Indicator, Infrastructure, IntrusionSet, Location, Malware,
+    Incident, Indicator, Infrastructure, IntrusionSet, Location, Malware,
     MalwareAnalysis, Note, ObservedData, Opinion, Report, ThreatActor, Tool,
     Vulnerability,
 )
@@ -49,6 +49,7 @@ OBJ_MAP = {
     'course-of-action': CourseOfAction,
     'grouping': Grouping,
     'identity': Identity,
+    'incident': Incident,
     'indicator': Indicator,
     'infrastructure': Infrastructure,
     'intrusion-set': IntrusionSet,
@@ -126,7 +127,7 @@ __all__ = """
     X509Certificate, X509V3ExtensionsType,
 
     AttackPattern, Campaign, CourseOfAction, CustomObject, Grouping, Identity,
-    Indicator, Infrastructure, IntrusionSet, Location, Malware,
+    Incident, Indicator, Infrastructure, IntrusionSet, Location, Malware,
     MalwareAnalysis, Note, ObservedData, Opinion, Report, ThreatActor, Tool,
     Vulnerability,
 
diff --git a/stix2/v21/sdo.py b/stix2/v21/sdo.py
index f3d6bcd..8f811b3 100644
--- a/stix2/v21/sdo.py
+++ b/stix2/v21/sdo.py
@@ -175,6 +175,33 @@ class Identity(_DomainObject):
     ])
 
 
+class Incident(_DomainObject):
+    """For more detailed information on this object's properties, see
+    `the STIX 2.1 specification <link here>`__.
+    """
+
+    _type = 'incident'
+    _properties = OrderedDict([
+        ('type', TypeProperty(_type, spec_version='2.1')),
+        ('spec_version', StringProperty(fixed='2.1')),
+        ('id', IDProperty(_type, spec_version='2.1')),
+        ('created_by_ref', ReferenceProperty(valid_types='identity', spec_version='2.1')),
+        ('created', TimestampProperty(default=lambda: NOW, precision='millisecond', precision_constraint='min')),
+        ('modified', TimestampProperty(default=lambda: NOW, precision='millisecond', precision_constraint='min')),
+        ('name', StringProperty(required=True)),
+        ('description', StringProperty()),
+        ('kill_chain_phases', ListProperty(KillChainPhase)),
+        ('revoked', BooleanProperty(default=lambda: False)),
+        ('labels', ListProperty(StringProperty)),
+        ('confidence', IntegerProperty()),
+        ('lang', StringProperty()),
+        ('external_references', ListProperty(ExternalReference)),
+        ('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
+        ('granular_markings', ListProperty(GranularMarking)),
+        ('extensions', ExtensionsProperty(spec_version='2.1')),
+    ])
+
+
 class Indicator(_DomainObject):
     """For more detailed information on this object's properties, see
     `the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_wfiae74706sw>`__.