diff --git a/README.md b/README.md
index 09257e5d2..63395054d 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@ Passing anything other than a string is an error.
 - **isLength(str, options)** - check if the string's length falls in a range. `options` is an object which defaults to `{min:0, max: undefined}`. Note: this function takes into account surrogate pairs.
 - **isLowercase(str)** - check if the string is lowercase.
 - **isMACAddress(str)** - check if the string is a MAC address.
-- **isMobilePhone(str, locale)** - check if the string is a mobile phone number, (locale is one of `['ar-SY', 'cs-CZ', 'de-DE', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-CA', 'en-ZA', 'en-ZM', 'es-ES', 'fi-FI', 'fr-FR', 'hu-HU', 'ms-MY', 'nb-NO', 'nn-NO', 'pt-PT', 'ru-RU', 'tr-TR', 'vi-VN', 'zh-CN', 'zh-TW']`).
+- **isMobilePhone(str, locale)** - check if the string is a mobile phone number, (locale is one of `['ar-SY', 'cs-CZ', 'de-DE', 'da-DK', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-CA', 'en-ZA', 'en-ZM', 'es-ES', 'fi-FI', 'fr-FR', 'hu-HU', 'ms-MY', 'nb-NO', 'nn-NO', 'pt-PT', 'ru-RU', 'tr-TR', 'vi-VN', 'zh-CN', 'zh-TW']`).
 - **isMongoId(str)** - check if the string is a valid hex-encoded representation of a [MongoDB ObjectId][mongoid].
 - **isMultibyte(str)** - check if the string contains one or more multibyte chars.
 - **isNull(str)** - check if the string is null (has a length of zero).
diff --git a/src/lib/isMobilePhone.js b/src/lib/isMobilePhone.js
index 8f480d9a9..c15437dce 100644
--- a/src/lib/isMobilePhone.js
+++ b/src/lib/isMobilePhone.js
@@ -6,6 +6,7 @@ const phones = {
   'en-US': /^(\+?1)?[2-9]\d{2}[2-9](?!11)\d{6}$/,
   'cs-CZ': /^(\+?420)? ?[1-9][0-9]{2} ?[0-9]{3} ?[0-9]{3}$/,
   'de-DE': /^(\+?49[ \.\-])?([\(]{1}[0-9]{1,6}[\)])?([0-9 \.\-\/]{3,20})((x|ext|extension)[ ]?[0-9]{1,4})?$/,
+  'da-DK': /^(\+?45)?(\d{8})$/,
   'el-GR': /^(\+?30)?(69\d{8})$/,
   'en-AU': /^(\+?61|0)4\d{8}$/,
   'en-GB': /^(\+?44|0)7\d{9}$/,