diff --git a/icu4c/source/i18n/unicode/plurfmt.h b/icu4c/source/i18n/unicode/plurfmt.h
index bcabf3950b1..db160546057 100644
--- a/icu4c/source/i18n/unicode/plurfmt.h
+++ b/icu4c/source/i18n/unicode/plurfmt.h
@@ -70,7 +70,7 @@ class NFRule;
  *     use the predefined keywords. The whole plural formatting of messages can
  *     be done using localized patterns from resource bundles. For predefined plural
  *     rules, see the CLDR <i>Language Plural Rules</i> page at
- *    http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
+ *     https://unicode-org.github.io/cldr-staging/charts/latest/supplemental/language_plural_rules.html
  * </ul>
  * </p>
  * <h4>Usage of <code>PluralFormat</code></h4>
diff --git a/icu4c/source/i18n/unicode/plurrule.h b/icu4c/source/i18n/unicode/plurrule.h
index 344bf1692b1..e90cd66a7f7 100644
--- a/icu4c/source/i18n/unicode/plurrule.h
+++ b/icu4c/source/i18n/unicode/plurrule.h
@@ -71,8 +71,8 @@ class UFormattedNumberRangeData;
  * default rule(other) is returned.
  *
  * For more information, details, and tips for writing rules, see the
- * LDML spec, C.11 Language Plural Rules:
- * http://www.unicode.org/draft/reports/tr35/tr35.html#Language_Plural_Rules
+ * LDML spec, Part 3.5 Language Plural Rules:
+ * https://www.unicode.org/reports/tr35/tr35-numbers.html#Language_Plural_Rules
  *
  * Examples:<pre>
  *   "one: n is 1; few: n in 2..4"</pre>
@@ -200,7 +200,7 @@ class UFormattedNumberRangeData;
  *  <p>
  *   ICU defines plural rules for many locales based on CLDR <i>Language Plural Rules</i>.
  *   For these predefined rules, see CLDR page at
- *    http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
+ *   https://unicode-org.github.io/cldr-staging/charts/latest/supplemental/language_plural_rules.html
  * </p>
  */
 class U_I18N_API PluralRules : public UObject {
diff --git a/icu4c/source/i18n/unicode/upluralrules.h b/icu4c/source/i18n/unicode/upluralrules.h
index 2cf0e6998c4..983651b1cac 100644
--- a/icu4c/source/i18n/unicode/upluralrules.h
+++ b/icu4c/source/i18n/unicode/upluralrules.h
@@ -39,8 +39,9 @@ struct UFormattedNumberRange;
  * returns the keyword for the first condition that matches the number.
  * If none match, the default rule(other) is returned.
  *
- * For more information, see the LDML spec, C.11 Language Plural Rules:
- * http://www.unicode.org/reports/tr35/#Language_Plural_Rules
+ * For more information, see the
+ * LDML spec, Part 3.5 Language Plural Rules:
+ * https://www.unicode.org/reports/tr35/tr35-numbers.html#Language_Plural_Rules
  *
  * Keywords: ICU locale data has 6 predefined values -
  * 'zero', 'one', 'two', 'few', 'many' and 'other'. Callers need to check
@@ -48,7 +49,7 @@ struct UFormattedNumberRange;
  *
  * These are based on CLDR <i>Language Plural Rules</i>. For these
  * predefined rules, see the CLDR page at
- * http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
+ * https://unicode-org.github.io/cldr-staging/charts/latest/supplemental/language_plural_rules.html
  */
 
 /**
diff --git a/icu4j/main/classes/core/src/com/ibm/icu/text/PluralFormat.java b/icu4j/main/classes/core/src/com/ibm/icu/text/PluralFormat.java
index 2036a261f62..fb65a03b145 100644
--- a/icu4j/main/classes/core/src/com/ibm/icu/text/PluralFormat.java
+++ b/icu4j/main/classes/core/src/com/ibm/icu/text/PluralFormat.java
@@ -60,7 +60,7 @@ import com.ibm.icu.util.ULocale.Category;
  *     use the predefined keywords. The whole plural formatting of messages can
  *     be done using localized patterns from resource bundles. For predefined plural
  *     rules, see the CLDR <i>Language Plural Rules</i> page at
- *    http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
+ *     https://unicode-org.github.io/cldr-staging/charts/latest/supplemental/language_plural_rules.html
  * </ul>
  *
  * <h4>Usage of <code>PluralFormat</code></h4>
diff --git a/icu4j/main/classes/core/src/com/ibm/icu/text/PluralRules.java b/icu4j/main/classes/core/src/com/ibm/icu/text/PluralRules.java
index c9a2936c908..5e21e71bb3f 100644
--- a/icu4j/main/classes/core/src/com/ibm/icu/text/PluralRules.java
+++ b/icu4j/main/classes/core/src/com/ibm/icu/text/PluralRules.java
@@ -53,8 +53,8 @@ import com.ibm.icu.util.ULocale;
  * </p>
  * <p>
  * For more information, details, and tips for writing rules, see the <a
- * href="http://www.unicode.org/draft/reports/tr35/tr35.html#Language_Plural_Rules">LDML spec, C.11 Language Plural
- * Rules</a>
+ * href="https://www.unicode.org/reports/tr35/tr35-numbers.html#Language_Plural_Rules">LDML spec,
+ * Part 3.5 Language Plural Rules</a>
  * </p>
  * <p>
  * Examples:
@@ -208,7 +208,8 @@ public class PluralRules implements Serializable {
          *
          * <p>
          * ICU defines plural rules for many locales based on CLDR <i>Language Plural Rules</i>. For these predefined
-         * rules, see CLDR page at http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
+         * rules, see CLDR page at
+         * https://unicode-org.github.io/cldr-staging/charts/latest/supplemental/language_plural_rules.html
          *
          * @param locale
          *            The locale for which a <code>PluralRules</code> object is returned.
@@ -2059,7 +2060,7 @@ public class PluralRules implements Serializable {
      *
      * <p>ICU defines plural rules for many locales based on CLDR <i>Language Plural Rules</i>.
      * For these predefined rules, see CLDR page at
-     * http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
+     * https://unicode-org.github.io/cldr-staging/charts/latest/supplemental/language_plural_rules.html
      *
      * @param locale The locale for which a <code>PluralRules</code> object is
      *   returned.
@@ -2081,7 +2082,7 @@ public class PluralRules implements Serializable {
      *
      * <p>ICU defines plural rules for many locales based on CLDR <i>Language Plural Rules</i>.
      * For these predefined rules, see CLDR page at
-     * http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
+     * https://unicode-org.github.io/cldr-staging/charts/latest/supplemental/language_plural_rules.html
      *
      * @param locale The locale for which a <code>PluralRules</code> object is
      *   returned.
@@ -2102,7 +2103,7 @@ public class PluralRules implements Serializable {
      *
      * <p>ICU defines plural rules for many locales based on CLDR <i>Language Plural Rules</i>.
      * For these predefined rules, see CLDR page at
-     * http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
+     * https://unicode-org.github.io/cldr-staging/charts/latest/supplemental/language_plural_rules.html
      *
      * @param locale The locale for which a <code>PluralRules</code> object is
      *   returned.
@@ -2124,7 +2125,7 @@ public class PluralRules implements Serializable {
      *
      * <p>ICU defines plural rules for many locales based on CLDR <i>Language Plural Rules</i>.
      * For these predefined rules, see CLDR page at
-     * http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
+     * https://unicode-org.github.io/cldr-staging/charts/latest/supplemental/language_plural_rules.html
      *
      * @param locale The locale for which a <code>PluralRules</code> object is
      *   returned.