diff --git a/awslimitchecker/services/__init__.py b/awslimitchecker/services/__init__.py
index d5031892..9b9ed305 100644
--- a/awslimitchecker/services/__init__.py
+++ b/awslimitchecker/services/__init__.py
@@ -40,6 +40,8 @@
 from awslimitchecker.services.base import _AwsService
 from awslimitchecker.services.apigateway import _ApigatewayService
 from awslimitchecker.services.autoscaling import _AutoscalingService
+from awslimitchecker.services.certificatemanager import \
+    _CertificatemanagerService
 from awslimitchecker.services.cloudformation import _CloudformationService
 from awslimitchecker.services.cloudtrail import _CloudTrailService
 from awslimitchecker.services.directoryservice import _DirectoryserviceService
diff --git a/awslimitchecker/services/certificatemanager.py b/awslimitchecker/services/certificatemanager.py
new file mode 100644
index 00000000..91735062
--- /dev/null
+++ b/awslimitchecker/services/certificatemanager.py
@@ -0,0 +1,117 @@
+"""
+awslimitchecker/services/certificatemanager.py
+
+The latest version of this package is available at:
+<https://github.com/jantman/awslimitchecker>
+
+################################################################################
+Copyright 2015-2018 Jason Antman <jason@jasonantman.com>
+
+    This file is part of awslimitchecker, also known as awslimitchecker.
+
+    awslimitchecker is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    awslimitchecker is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with awslimitchecker.  If not, see <http://www.gnu.org/licenses/>.
+
+The Copyright and Authors attributions contained herein may not be removed or
+otherwise altered, except to add the Author attribution of a contributor to
+this work. (Additional Terms pursuant to Section 7b of the AGPL v3)
+################################################################################
+While not legally required, I sincerely request that anyone who finds
+bugs please submit them at <https://github.com/jantman/awslimitchecker> or
+to me via email, and that you send any contributions or improvements
+either as a pull request on GitHub, or to me via email.
+################################################################################
+
+AUTHORS:
+Jason Antman <jason@jasonantman.com> <http://www.jasonantman.com>
+################################################################################
+"""
+
+import abc  # noqa
+import logging
+
+from .base import _AwsService
+from ..limit import AwsLimit
+from ..utils import paginate_dict
+
+logger = logging.getLogger(__name__)
+
+
+class _CertificatemanagerService(_AwsService):
+
+    service_name = 'CertificateManager'
+    api_name = 'acm'  # AWS API name to connect to (boto3.client)
+    quotas_service_code = 'acm'
+
+    def find_usage(self):
+        """
+        List CloudFront distributions by calling AWS list_certificates, and
+        update usage in self.limits for the limit 'ACM certificates'
+        """
+        logger.debug("Checking usage for service %s", self.service_name)
+        self.connect()
+        for lim in self.limits.values():
+            lim._reset_usage()
+
+        self._find_usage_certificates()
+
+        self._have_usage = True
+        logger.debug("Done checking usage.")
+
+    def _find_usage_certificates(self):
+        """find usage for ACM certificates"""
+        res = paginate_dict(
+            self.conn.list_certificates,
+            alc_marker_path=['NextToken'],
+            alc_data_path=['CertificateSummaryList'],
+            alc_marker_param='NextToken'
+        )
+        if 'CertificateSummaryList' not in res:
+            nb_certificates = 0
+        else:
+            nb_certificates = len(res['CertificateSummaryList'])
+        self.limits['ACM certificates']._add_current_usage(nb_certificates)
+
+    def get_limits(self):
+        """
+        Return all known limits for this service, as a dict of their names
+        to :py:class:`~.AwsLimit` objects.
+
+        :returns: dict of limit names to :py:class:`~.AwsLimit` objects
+        :rtype: dict
+        """
+        if self.limits != {}:
+            return self.limits
+        limits = {}
+        limits['ACM certificates'] = AwsLimit(
+            'ACM certificates',
+            self,
+            1000,
+            self.warning_threshold,
+            self.critical_threshold
+        )
+        self.limits = limits
+        return limits
+
+    def required_iam_permissions(self):
+        """
+        Return a list of IAM Actions required for this Service to function
+        properly. All Actions will be shown with an Effect of "Allow"
+        and a Resource of "*".
+
+        :returns: list of IAM Action strings
+        :rtype: list
+        """
+        return [
+            "acm:ListCertificates",
+        ]
diff --git a/awslimitchecker/tests/services/result_fixtures.py b/awslimitchecker/tests/services/result_fixtures.py
index 4c7324e2..1043b509 100644
--- a/awslimitchecker/tests/services/result_fixtures.py
+++ b/awslimitchecker/tests/services/result_fixtures.py
@@ -4724,3 +4724,26 @@ class EKS(object):
             }
         }
     ]
+
+
+class CertificateManager(object):
+    test_find_usage_certificates_empty = {
+    }
+
+    test_find_usage_certificates = {
+        'NextToken': 'string',
+        'CertificateSummaryList': [
+            {
+                'CertificateArn': 'string1',
+                'DomainName': 'string1'
+            },
+            {
+                'CertificateArn': 'string2',
+                'DomainName': 'string2'
+            },
+            {
+                'CertificateArn': 'string3',
+                'DomainName': 'string3'
+            },
+        ]
+    }
diff --git a/awslimitchecker/tests/services/test_certificatemanager.py b/awslimitchecker/tests/services/test_certificatemanager.py
new file mode 100644
index 00000000..f105551b
--- /dev/null
+++ b/awslimitchecker/tests/services/test_certificatemanager.py
@@ -0,0 +1,173 @@
+"""
+awslimitchecker/tests/services/test_certificatemanager.py
+
+The latest version of this package is available at:
+<https://github.com/jantman/awslimitchecker>
+
+################################################################################
+Copyright 2015-2018 Jason Antman <jason@jasonantman.com>
+
+    This file is part of awslimitchecker, also known as awslimitchecker.
+
+    awslimitchecker is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    awslimitchecker is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with awslimitchecker.  If not, see <http://www.gnu.org/licenses/>.
+
+The Copyright and Authors attributions contained herein may not be removed or
+otherwise altered, except to add the Author attribution of a contributor to
+this work. (Additional Terms pursuant to Section 7b of the AGPL v3)
+################################################################################
+While not legally required, I sincerely request that anyone who finds
+bugs please submit them at <https://github.com/jantman/awslimitchecker> or
+to me via email, and that you send any contributions or improvements
+either as a pull request on GitHub, or to me via email.
+################################################################################
+
+AUTHORS:
+Jason Antman <jason@jasonantman.com> <http://www.jasonantman.com>
+################################################################################
+"""
+
+import sys
+from awslimitchecker.tests.services import result_fixtures
+from awslimitchecker.services.certificatemanager import \
+    _CertificatemanagerService
+
+# https://code.google.com/p/mock/issues/detail?id=249
+# py>=3.4 should use unittest.mock not the mock package on pypi
+if (
+        sys.version_info[0] < 3 or
+        sys.version_info[0] == 3 and sys.version_info[1] < 4
+):
+    from mock import patch, call, Mock, DEFAULT
+else:
+    from unittest.mock import patch, call, Mock, DEFAULT
+
+
+pbm = 'awslimitchecker.services.certificatemanager'  # module patch base
+pb = '%s._CertificatemanagerService' % pbm  # class patch pase
+
+
+class Test_CertificatemanagerService(object):
+
+    def test_init(self):
+        """test __init__()"""
+        cls = _CertificatemanagerService(21, 43, {}, None)
+        assert cls.service_name == 'CertificateManager'
+        assert cls.api_name == 'acm'
+        assert cls.conn is None
+        assert cls.warning_threshold == 21
+        assert cls.critical_threshold == 43
+
+    def test_get_limits(self):
+        cls = _CertificatemanagerService(21, 43, {}, None)
+        cls.limits = {}
+        res = cls.get_limits()
+        assert sorted(res.keys()) == sorted([
+            'ACM certificates',
+        ])
+        for name, limit in res.items():
+            assert limit.service == cls
+            assert limit.def_warning_threshold == 21
+            assert limit.def_critical_threshold == 43
+
+    def test_get_limits_again(self):
+        """test that existing limits dict is returned on subsequent calls"""
+        mock_limits = Mock()
+        cls = _CertificatemanagerService(21, 43, {}, None)
+        cls.limits = mock_limits
+        res = cls.get_limits()
+        assert res == mock_limits
+
+    def test_find_usage(self):
+        """
+        Test overall find_usage method
+        Check that find_usage() method calls the other methods.
+        """
+        with patch.multiple(
+            pb,
+            connect=DEFAULT,
+            _find_usage_certificates=DEFAULT,
+            autospec=True
+        ) as mocks:
+            cls = _CertificatemanagerService(21, 43, {}, None)
+            assert cls._have_usage is False
+            cls.find_usage()
+
+        assert cls._have_usage is True
+        assert len(mocks) == 2
+        # the other methods should have been called
+        for x in [
+            "_find_usage_certificates"
+        ]:
+            assert mocks[x].mock_calls == [call(cls)]
+
+    def test_find_usage_certificates_empty(self):
+        """
+        Verify the correctness of usage (when there are no certificates)
+        This test mocks the AWS list_certificates response (after pagination).
+        """
+        # Setup the mock and call the tested function
+        resp = result_fixtures.CertificateManager\
+            .test_find_usage_certificates_empty
+        mock_conn = Mock()
+        with patch("%s.paginate_dict" % pbm) as mock_paginate:
+            cls = _CertificatemanagerService(21, 43, {}, None)
+            cls.conn = mock_conn
+            mock_paginate.return_value = resp
+            cls._find_usage_certificates()
+
+        # Check that usage values are correctly set
+        assert len(
+            cls.limits["ACM certificates"].get_current_usage()
+        ) == 1
+        assert (
+            cls.limits["ACM certificates"].get_current_usage()[0]
+            .get_value() == 0
+        )
+        assert (
+            cls.limits["ACM certificates"].get_current_usage()[0]
+            .resource_id is None
+        )
+
+    def test_find_usage_certificates(self):
+        """
+        Verify the correctness of usage
+        This test mocks the AWS list_certificates response (after pagination).
+        """
+        # Setup the mock and call the tested function
+        resp = result_fixtures.CertificateManager.test_find_usage_certificates
+        mock_conn = Mock()
+        with patch("%s.paginate_dict" % pbm) as mock_paginate:
+            cls = _CertificatemanagerService(21, 43, {}, None)
+            cls.conn = mock_conn
+            mock_paginate.return_value = resp
+            cls._find_usage_certificates()
+
+        # Check that usage values are correctly set
+        assert len(
+            cls.limits["ACM certificates"].get_current_usage()
+        ) == 1
+        assert (
+            cls.limits["ACM certificates"].get_current_usage()[0]
+            .get_value() == 3
+        )
+        assert (
+            cls.limits["ACM certificates"].get_current_usage()[0]
+            .resource_id is None
+        )
+
+    def test_required_iam_permissions(self):
+        cls = _CertificatemanagerService(21, 43, {}, None)
+        assert cls.required_iam_permissions() == [
+            "acm:ListCertificates"
+        ]
diff --git a/docs/source/awslimitchecker.services.certificatemanager.rst b/docs/source/awslimitchecker.services.certificatemanager.rst
new file mode 100644
index 00000000..c039c9e8
--- /dev/null
+++ b/docs/source/awslimitchecker.services.certificatemanager.rst
@@ -0,0 +1,8 @@
+awslimitchecker.services.certificatemanager module
+==================================================
+
+.. automodule:: awslimitchecker.services.certificatemanager
+   :members:
+   :undoc-members:
+   :show-inheritance:
+   :private-members:
diff --git a/docs/source/awslimitchecker.services.rst b/docs/source/awslimitchecker.services.rst
index e849f0a5..bc407fea 100644
--- a/docs/source/awslimitchecker.services.rst
+++ b/docs/source/awslimitchecker.services.rst
@@ -16,6 +16,7 @@ Submodules
    awslimitchecker.services.apigateway
    awslimitchecker.services.autoscaling
    awslimitchecker.services.base
+   awslimitchecker.services.certificatemanager
    awslimitchecker.services.cloudformation
    awslimitchecker.services.cloudtrail
    awslimitchecker.services.directoryservice
diff --git a/docs/source/iam_policy.rst b/docs/source/iam_policy.rst
index 0878346c..15bd23ec 100644
--- a/docs/source/iam_policy.rst
+++ b/docs/source/iam_policy.rst
@@ -31,6 +31,7 @@ services that do not affect the results of this program.
       "Statement": [
         {
           "Action": [
+            "acm:ListCertificates",
             "apigateway:GET",
             "apigateway:HEAD",
             "apigateway:OPTIONS",