diff --git a/README.md b/README.md
index cb278ff16..044c8c354 100644
--- a/README.md
+++ b/README.md
@@ -115,7 +115,7 @@ Validator                               | Description
 **isHexColor(str)**                     | check if the string is a hexadecimal color.
 **isHSL(str)**                          | check if the string is an HSL (hue, saturation, lightness, optional alpha) color based on [CSS Colors Level 4 specification](https://developer.mozilla.org/en-US/docs/Web/CSS/color_value).<br/><br/>Comma-separated format supported. Space-separated format supported with the exception of a few edge cases (ex: `hsl(200grad+.1%62%/1)`).
 **isIBAN(str)**                         | check if a string is a IBAN (International Bank Account Number).
-**isIdentityCard(str [, locale])**      | check if the string is a valid identity card code.<br/><br/>`locale` is one of `['ES', 'IN', 'IT', 'IR', 'MZ', 'NO', 'TH', 'zh-TW', 'he-IL', 'ar-LY', 'ar-TN', 'zh-CN']` OR `'any'`. If 'any' is used, function will check if any of the locals match.<br/><br/>Defaults to 'any'.
+**isIdentityCard(str [, locale])**      | check if the string is a valid identity card code.<br/><br/>`locale` is one of `['PL', 'ES', 'IN', 'IT', 'IR', 'MZ', 'NO', 'TH', 'zh-TW', 'he-IL', 'ar-LY', 'ar-TN', 'zh-CN']` OR `'any'`. If 'any' is used, function will check if any of the locals match.<br/><br/>Defaults to 'any'.
 **isIMEI(str [, options]))**                         | check if the string is a valid IMEI number. Imei should be of format `###############` or `##-######-######-#`.<br/><br/>`options` is an object which can contain the keys `allow_hyphens`. Defaults to first format . If allow_hyphens is set to true, the validator will validate the second format.
 **isIn(str, values)**                   | check if the string is in a array of allowed values.
 **isInt(str [, options])**              | check if the string is an integer.<br/><br/>`options` is an object which can contain the keys `min` and/or `max` to check the integer is within boundaries (e.g. `{ min: 10, max: 99 }`). `options` can also contain the key `allow_leading_zeroes`, which when set to false will disallow integer values with leading zeroes (e.g. `{ allow_leading_zeroes: false }`). Finally, `options` can contain the keys `gt` and/or `lt` which will enforce integers being greater than or less than, respectively, the value provided (e.g. `{gt: 1, lt: 4}` for a number between 1 and 4).
diff --git a/src/lib/isIdentityCard.js b/src/lib/isIdentityCard.js
index 64616340b..8ea15e262 100644
--- a/src/lib/isIdentityCard.js
+++ b/src/lib/isIdentityCard.js
@@ -1,6 +1,39 @@
 import assertString from './util/assertString';
+import isInt from './isInt';
 
 const validators = {
+  PL: (str) => {
+    assertString(str);
+
+    const weightOfDigits = {
+      1: 1,
+      2: 3,
+      3: 7,
+      4: 9,
+      5: 1,
+      6: 3,
+      7: 7,
+      8: 9,
+      9: 1,
+      10: 3,
+      11: 0,
+    };
+
+    if (str != null && str.length === 11 && isInt(str, { allow_leading_zeroes: true })) {
+      const digits = str.split('').slice(0, -1);
+      const sum = digits.reduce((acc, digit, index) =>
+        acc + (Number(digit) * weightOfDigits[index + 1]), 0);
+
+      const modulo = sum % 10;
+      const lastDigit = Number(str.charAt(str.length - 1));
+
+      if ((modulo === 0 && lastDigit === 0) || lastDigit === 10 - modulo) {
+        return true;
+      }
+    }
+
+    return false;
+  },
   ES: (str) => {
     assertString(str);
 
diff --git a/test/validators.js b/test/validators.js
index 13e066741..286eb6924 100644
--- a/test/validators.js
+++ b/test/validators.js
@@ -4672,6 +4672,31 @@ describe('Validators', () => {
 
   it('should validate identity cards', () => {
     const fixtures = [
+      {
+        locale: 'PL',
+        valid: [
+          '99012229019',
+          '09210215408',
+          '20313034701',
+          '86051575214',
+          '77334586883',
+          '54007481320',
+          '06566860643',
+          '77552478861',
+        ],
+        invalid: [
+          'aa',
+          '5',
+          '195',
+          '',
+          ' ',
+          '12345678901',
+          '99212229019',
+          '09210215402',
+          '20313534701',
+          '86241579214',
+        ],
+      },
       {
         locale: 'ES',
         valid: [