diff --git a/gradle/generation/icu.gradle b/gradle/generation/icu.gradle
index a68b0e189e5..039db07c3ea 100644
--- a/gradle/generation/icu.gradle
+++ b/gradle/generation/icu.gradle
@@ -51,12 +51,16 @@ configure(project(":lucene:analysis:icu")) {
 
     doFirst {
       // all these steps must be done sequentially: it's a pipeline resulting in utr30.nrm
+      def v = getVersion('com.ibm.icu', 'icu4j');
       project.javaexec {
         main = "org.apache.lucene.analysis.icu.GenerateUTR30DataFiles"
         classpath = sourceSets.tools.runtimeClasspath
 
         ignoreExitValue false
         workingDir utr30DataDir
+        args = [
+            "release-${v.replace(".", "-")}"
+        ]
       }
 
       project.exec {
diff --git a/lucene/CHANGES.txt b/lucene/CHANGES.txt
index dfb6946d66d..40d61c93848 100644
--- a/lucene/CHANGES.txt
+++ b/lucene/CHANGES.txt
@@ -256,6 +256,8 @@ Other
 * LUCENE-9627: Remove unused Lucene50FieldInfosFormat codec and small refactor some codecs
   to separate reading header/footer from reading content of the file. (Ignacio Vera)
 
+* LUCENE-9773: Upgrade icu to 68.2 (Robert Muir)
+
 ======================= Lucene 8.9.0 =======================
 
 API Changes
diff --git a/lucene/analysis/icu/src/data/utr30/BasicFoldings.txt b/lucene/analysis/icu/src/data/utr30/BasicFoldings.txt
index 1246a87bcea..3a6fe718f77 100644
--- a/lucene/analysis/icu/src/data/utr30/BasicFoldings.txt
+++ b/lucene/analysis/icu/src/data/utr30/BasicFoldings.txt
@@ -56,6 +56,7 @@
 FE58>002D
 FE63>002D
 FF0D>002D
+10EAD>002D
 
 ## Greek letterforms folding (done by kd)
 
diff --git a/lucene/analysis/icu/src/data/utr30/DiacriticFolding.txt b/lucene/analysis/icu/src/data/utr30/DiacriticFolding.txt
index ac6ac1eb05b..a6c7c4b352b 100644
--- a/lucene/analysis/icu/src/data/utr30/DiacriticFolding.txt
+++ b/lucene/analysis/icu/src/data/utr30/DiacriticFolding.txt
@@ -76,6 +76,7 @@
 0AFD..0AFF>
 0B3C>
 0B4D>
+0B55>
 0BCD>
 0C4D>
 0CBC>
@@ -85,6 +86,7 @@
 0DCA>
 0E47..0E4C>
 0E4E>
+0EBA>
 0EC8..0ECC>
 0F18..0F19>
 0F35>
@@ -96,9 +98,12 @@
 0FC6>
 1037>
 1039..103A>
+1063..1064>
+1069..106D>
 1087..108D>
 108F>
 109A..109B>
+135D..135F>
 17C9..17D3>
 17DD>
 1939..193B>
@@ -135,8 +140,8 @@ A67C..A67D>
 A67F>
 A69C..A69D>
 A6F0..A6F1>
-A717..A721>
-A788>
+A700..A721>
+A788..A78A>
 A7F8..A7F9>
 A8C4>
 A8E0..A8F1>
@@ -149,6 +154,7 @@ AA7B..AA7D>
 AABF..AAC2>
 AAF6>
 AB5B..AB5F>
+AB69..AB6B>
 ABEC..ABED>
 FB1E>
 FE20..FE2F>
@@ -180,6 +186,9 @@ FFE3>
 116B6..116B7>
 1172B>
 11839..1183A>
+1193D..1193E>
+11943>
+119E0>
 11A34>
 11A47>
 11A99>
@@ -188,12 +197,16 @@ FFE3>
 11D44..11D45>
 11D97>
 16AF0..16AF4>
+16B30..16B36>
 16F8F..16F9F>
+16FF0..16FF1>
 1D167..1D169>
 1D16D..1D172>
 1D17B..1D182>
 1D185..1D18B>
 1D1AA..1D1AD>
+1E130..1E136>
+1E2EC..1E2EF>
 1E8D0..1E8D6>
 1E944..1E946>
 1E948..1E94A>
diff --git a/lucene/analysis/icu/src/data/utr30/NativeDigitFolding.txt b/lucene/analysis/icu/src/data/utr30/NativeDigitFolding.txt
index 382a2795601..c3c28fc9b20 100644
--- a/lucene/analysis/icu/src/data/utr30/NativeDigitFolding.txt
+++ b/lucene/analysis/icu/src/data/utr30/NativeDigitFolding.txt
@@ -580,6 +580,16 @@ ABF9>0039   # MEETEI MAYEK DIGIT NINE
 118E7>0037   # WARANG CITI DIGIT SEVEN
 118E8>0038   # WARANG CITI DIGIT EIGHT
 118E9>0039   # WARANG CITI DIGIT NINE
+11950>0030   # DIVES AKURU DIGIT ZERO
+11951>0031   # DIVES AKURU DIGIT ONE
+11952>0032   # DIVES AKURU DIGIT TWO
+11953>0033   # DIVES AKURU DIGIT THREE
+11954>0034   # DIVES AKURU DIGIT FOUR
+11955>0035   # DIVES AKURU DIGIT FIVE
+11956>0036   # DIVES AKURU DIGIT SIX
+11957>0037   # DIVES AKURU DIGIT SEVEN
+11958>0038   # DIVES AKURU DIGIT EIGHT
+11959>0039   # DIVES AKURU DIGIT NINE
 11C50>0030   # BHAIKSUKI DIGIT ZERO
 11C51>0031   # BHAIKSUKI DIGIT ONE
 11C52>0032   # BHAIKSUKI DIGIT TWO
@@ -630,6 +640,26 @@ ABF9>0039   # MEETEI MAYEK DIGIT NINE
 16B57>0037   # PAHAWH HMONG DIGIT SEVEN
 16B58>0038   # PAHAWH HMONG DIGIT EIGHT
 16B59>0039   # PAHAWH HMONG DIGIT NINE
+1E140>0030   # NYIAKENG PUACHUE HMONG DIGIT ZERO
+1E141>0031   # NYIAKENG PUACHUE HMONG DIGIT ONE
+1E142>0032   # NYIAKENG PUACHUE HMONG DIGIT TWO
+1E143>0033   # NYIAKENG PUACHUE HMONG DIGIT THREE
+1E144>0034   # NYIAKENG PUACHUE HMONG DIGIT FOUR
+1E145>0035   # NYIAKENG PUACHUE HMONG DIGIT FIVE
+1E146>0036   # NYIAKENG PUACHUE HMONG DIGIT SIX
+1E147>0037   # NYIAKENG PUACHUE HMONG DIGIT SEVEN
+1E148>0038   # NYIAKENG PUACHUE HMONG DIGIT EIGHT
+1E149>0039   # NYIAKENG PUACHUE HMONG DIGIT NINE
+1E2F0>0030   # WANCHO DIGIT ZERO
+1E2F1>0031   # WANCHO DIGIT ONE
+1E2F2>0032   # WANCHO DIGIT TWO
+1E2F3>0033   # WANCHO DIGIT THREE
+1E2F4>0034   # WANCHO DIGIT FOUR
+1E2F5>0035   # WANCHO DIGIT FIVE
+1E2F6>0036   # WANCHO DIGIT SIX
+1E2F7>0037   # WANCHO DIGIT SEVEN
+1E2F8>0038   # WANCHO DIGIT EIGHT
+1E2F9>0039   # WANCHO DIGIT NINE
 1E950>0030   # ADLAM DIGIT ZERO
 1E951>0031   # ADLAM DIGIT ONE
 1E952>0032   # ADLAM DIGIT TWO
diff --git a/lucene/analysis/icu/src/data/utr30/nfc.txt b/lucene/analysis/icu/src/data/utr30/nfc.txt
index c143c1c5601..90fb17593c6 100644
--- a/lucene/analysis/icu/src/data/utr30/nfc.txt
+++ b/lucene/analysis/icu/src/data/utr30/nfc.txt
@@ -9,7 +9,7 @@
 #
 # Complete data for Unicode NFC normalization.
 
-* Unicode 11.0.0
+* Unicode 13.0.0
 
 # Canonical_Combining_Class (ccc) values
 0300..0314:230
@@ -176,6 +176,7 @@
 0E3A:9
 0E48..0E4B:107
 0EB8..0EB9:118
+0EBA:9
 0EC8..0ECB:122
 0F18..0F19:220
 0F35:220
@@ -211,6 +212,7 @@
 1AB5..1ABA:220
 1ABB..1ABC:230
 1ABD:220
+1ABF..1AC0:220
 1B34:7
 1B44:9
 1B6B:230
@@ -275,6 +277,7 @@ A674..A67D:230
 A69E..A69F:230
 A6F0..A6F1:230
 A806:9
+A82C:9
 A8C4:9
 A8E0..A8F1:230
 A92B..A92D:220
@@ -305,6 +308,7 @@ FE2E..FE2F:230
 10AE5:230
 10AE6:220
 10D24..10D27:230
+10EAB..10EAC:230
 10F46..10F47:220
 10F48..10F4A:230
 10F4B:220
@@ -340,6 +344,9 @@ FE2E..FE2F:230
 1172B:9
 11839:9
 1183A:7
+1193D..1193E:9
+11943:7
+119E0:9
 11A34:9
 11A47:9
 11A99:9
@@ -349,6 +356,7 @@ FE2E..FE2F:230
 11D97:9
 16AF0..16AF4:1
 16B30..16B36:230
+16FF0..16FF1:6
 1BC9E:1
 1D165..1D166:216
 1D167..1D169:1
@@ -364,6 +372,8 @@ FE2E..FE2F:230
 1E01B..1E021:230
 1E023..1E024:230
 1E026..1E02A:230
+1E130..1E136:230
+1E2EC..1E2EF:230
 1E8D0..1E8D6:220
 1E944..1E949:230
 1E94A:7
@@ -1874,6 +1884,7 @@ FB4E>05E4 05BF
 114BE=114B9 114BD
 115BA=115B8 115AF
 115BB=115B9 115AF
+11938=11935 11930
 1D15E>1D157 1D165
 1D15F>1D158 1D165
 1D160>1D15F 1D16E
diff --git a/lucene/analysis/icu/src/data/utr30/nfkc.txt b/lucene/analysis/icu/src/data/utr30/nfkc.txt
index 416c6800ec2..675cd107aaa 100644
--- a/lucene/analysis/icu/src/data/utr30/nfkc.txt
+++ b/lucene/analysis/icu/src/data/utr30/nfkc.txt
@@ -13,7 +13,7 @@
 # to NFKC one-way mappings.
 # Use this file as the second gennorm2 input file after nfc.txt.
 
-* Unicode 11.0.0
+* Unicode 13.0.0
 
 00A0>0020
 00A8>0020 0308
@@ -1107,6 +1107,7 @@
 32FC>30F0
 32FD>30F1
 32FE>30F2
+32FF>4EE4 548C
 3300>30A2 30D1 30FC 30C8
 3301>30A2 30EB 30D5 30A1
 3302>30A2 30F3 30DA 30A2
@@ -1372,6 +1373,7 @@ AB5C>A727
 AB5D>AB37
 AB5E>026B
 AB5F>AB52
+AB69>028D
 FB00>0066 0066
 FB01>0066 0069
 FB02>0066 006C
@@ -3630,6 +3632,7 @@ FFEE>25CB
 1F14F>0057 0043
 1F16A>004D 0043
 1F16B>004D 0044
+1F16C>004D 0052
 1F190>0044 004A
 1F200>307B 304B
 1F201>30B3 30B3
@@ -3689,3 +3692,13 @@ FFEE>25CB
 1F248>3014 6557 3015
 1F250>5F97
 1F251>53EF
+1FBF0>0030
+1FBF1>0031
+1FBF2>0032
+1FBF3>0033
+1FBF4>0034
+1FBF5>0035
+1FBF6>0036
+1FBF7>0037
+1FBF8>0038
+1FBF9>0039
diff --git a/lucene/analysis/icu/src/data/utr30/nfkc_cf.txt b/lucene/analysis/icu/src/data/utr30/nfkc_cf.txt
index d37386e0506..21c441f945b 100644
--- a/lucene/analysis/icu/src/data/utr30/nfkc_cf.txt
+++ b/lucene/analysis/icu/src/data/utr30/nfkc_cf.txt
@@ -12,7 +12,7 @@
 # and reformatted into syntax for the gennorm2 Normalizer2 data generator tool.
 # Use this file as the third gennorm2 input file after nfc.txt and nfkc.txt.
 
-* Unicode 11.0.0
+* Unicode 13.0.0
 
 0041>0061
 0042>0062
@@ -2082,6 +2082,7 @@
 32FC>30F0
 32FD>30F1
 32FE>30F2
+32FF>4EE4 548C
 3300>30A2 30D1 30FC 30C8
 3301>30A2 30EB 30D5 30A1
 3302>30A2 30F3 30DA 30A2
@@ -2450,12 +2451,23 @@ A7B3>AB53
 A7B4>A7B5
 A7B6>A7B7
 A7B8>A7B9
+A7BA>A7BB
+A7BC>A7BD
+A7BE>A7BF
+A7C2>A7C3
+A7C4>A794
+A7C5>0282
+A7C6>1D8E
+A7C7>A7C8
+A7C9>A7CA
+A7F5>A7F6
 A7F8>0127
 A7F9>0153
 AB5C>A727
 AB5D>AB37
 AB5E>026B
 AB5F>AB52
+AB69>028D
 AB70>13A0
 AB71>13A1
 AB72>13A2
@@ -5319,6 +5331,7 @@ FFF0..FFF8>
 1F14F>0077 0063
 1F16A>006D 0063
 1F16B>006D 0064
+1F16C>006D 0072
 1F190>0064 006A
 1F200>307B 304B
 1F201>30B3 30B3
@@ -5378,6 +5391,16 @@ FFF0..FFF8>
 1F248>3014 6557 3015
 1F250>5F97
 1F251>53EF
+1FBF0>0030
+1FBF1>0031
+1FBF2>0032
+1FBF3>0033
+1FBF4>0034
+1FBF5>0035
+1FBF6>0036
+1FBF7>0037
+1FBF8>0038
+1FBF9>0039
 2F800>4E3D
 2F801>4E38
 2F802>4E41
diff --git a/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/segmentation/Default.brk b/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/segmentation/Default.brk
index 9333a40bec9..e10d24e07f1 100644
Binary files a/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/segmentation/Default.brk and b/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/segmentation/Default.brk differ
diff --git a/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/segmentation/MyanmarSyllable.brk b/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/segmentation/MyanmarSyllable.brk
index 7a138834e91..0e9dd26a897 100644
Binary files a/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/segmentation/MyanmarSyllable.brk and b/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/segmentation/MyanmarSyllable.brk differ
diff --git a/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/utr30.nrm b/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/utr30.nrm
index 4c31f905077..92a6919e37f 100644
Binary files a/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/utr30.nrm and b/lucene/analysis/icu/src/resources/org/apache/lucene/analysis/icu/utr30.nrm differ
diff --git a/lucene/analysis/icu/src/tools/java/org/apache/lucene/analysis/icu/GenerateUTR30DataFiles.java b/lucene/analysis/icu/src/tools/java/org/apache/lucene/analysis/icu/GenerateUTR30DataFiles.java
index ee5ea85d33b..9bf46a0aae7 100644
--- a/lucene/analysis/icu/src/tools/java/org/apache/lucene/analysis/icu/GenerateUTR30DataFiles.java
+++ b/lucene/analysis/icu/src/tools/java/org/apache/lucene/analysis/icu/GenerateUTR30DataFiles.java
@@ -42,7 +42,7 @@ import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
 /**
- * Downloads/generates lucene/analysis/icu/src/data/utr30/*.txt
+ * Downloads/generates lucene/analysis/icu/src/data/utr30/*.txt for the specified icu release tag.
  *
  * <p>ASSUMPTION: This class will be run with current directory set to
  * lucene/analysis/icu/src/data/utr30/
@@ -56,7 +56,6 @@ import java.util.stream.Collectors;
  */
 public class GenerateUTR30DataFiles {
   private static final String ICU_GIT_TAG_URL = "https://raw.githubusercontent.com/unicode-org/icu";
-  private static final String ICU_RELEASE_TAG = "maint/maint-62";
   private static final String ICU_DATA_NORM2_PATH = "icu4c/source/data/unidata/norm2";
   private static final String NFC_TXT = "nfc.txt";
   private static final String NFKC_TXT = "nfkc.txt";
@@ -74,7 +73,11 @@ public class GenerateUTR30DataFiles {
 
   public static void main(String args[]) {
     try {
-      getNFKCDataFilesFromIcuProject();
+      if (args.length != 1) {
+        throw new IllegalArgumentException(
+            "usage: " + GenerateUTR30DataFiles.class.getName() + " <releaseTag>");
+      }
+      getNFKCDataFilesFromIcuProject(args[0]);
       expandRulesInUTR30DataFiles();
     } catch (Throwable t) {
       t.printStackTrace(System.err);
@@ -151,9 +154,9 @@ public class GenerateUTR30DataFiles {
     }
   }
 
-  private static void getNFKCDataFilesFromIcuProject() throws IOException {
+  private static void getNFKCDataFilesFromIcuProject(String releaseTag) throws IOException {
     URL icuTagsURL = new URL(ICU_GIT_TAG_URL + "/");
-    URL icuReleaseTagURL = new URL(icuTagsURL, ICU_RELEASE_TAG + "/");
+    URL icuReleaseTagURL = new URL(icuTagsURL, releaseTag + "/");
     URL norm2url = new URL(icuReleaseTagURL, ICU_DATA_NORM2_PATH + "/");
 
     System.err.print("Downloading " + NFKC_TXT + " ... ");
diff --git a/lucene/licenses/icu4j-62.2.jar.sha1 b/lucene/licenses/icu4j-62.2.jar.sha1
deleted file mode 100644
index 9691f210c8a..00000000000
--- a/lucene/licenses/icu4j-62.2.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-9ad0d915018dcbb394678a920d72f606cd1c7214
diff --git a/lucene/licenses/icu4j-68.2.jar.sha1 b/lucene/licenses/icu4j-68.2.jar.sha1
new file mode 100644
index 00000000000..3b682a5877d
--- /dev/null
+++ b/lucene/licenses/icu4j-68.2.jar.sha1
@@ -0,0 +1 @@
+76893e6000401ace133a65262254be0ebe556d46
diff --git a/solr/licenses/icu4j-62.2.jar.sha1 b/solr/licenses/icu4j-62.2.jar.sha1
deleted file mode 100644
index 9691f210c8a..00000000000
--- a/solr/licenses/icu4j-62.2.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-9ad0d915018dcbb394678a920d72f606cd1c7214
diff --git a/solr/licenses/icu4j-68.2.jar.sha1 b/solr/licenses/icu4j-68.2.jar.sha1
new file mode 100644
index 00000000000..3b682a5877d
--- /dev/null
+++ b/solr/licenses/icu4j-68.2.jar.sha1
@@ -0,0 +1 @@
+76893e6000401ace133a65262254be0ebe556d46
diff --git a/versions.lock b/versions.lock
index b738b791bba..433f98b09cb 100644
--- a/versions.lock
+++ b/versions.lock
@@ -23,7 +23,7 @@ com.googlecode.juniversalchardet:juniversalchardet:1.0.3 (1 constraints: 0605f33
 com.googlecode.mp4parser:isoparser:1.1.22 (1 constraints: 38052d3b)
 com.healthmarketscience.jackcess:jackcess:3.0.1 (1 constraints: 0605fb35)
 com.healthmarketscience.jackcess:jackcess-encrypt:3.0.0 (1 constraints: 0505fa35)
-com.ibm.icu:icu4j:62.2 (1 constraints: de040d31)
+com.ibm.icu:icu4j:68.2 (1 constraints: e4041f31)
 com.jayway.jsonpath:json-path:2.4.0 (1 constraints: 08050136)
 com.lmax:disruptor:3.4.2 (1 constraints: 0b050836)
 com.pff:java-libpst:0.8.1 (1 constraints: 0b050436)
diff --git a/versions.props b/versions.props
index ab51fb6f022..01402e8afa7 100644
--- a/versions.props
+++ b/versions.props
@@ -16,7 +16,7 @@ com.googlecode.juniversalchardet:juniversalchardet=1.0.3
 com.googlecode.mp4parser:isoparser=1.1.22
 com.healthmarketscience.jackcess:jackcess-encrypt=3.0.0
 com.healthmarketscience.jackcess:jackcess=3.0.1
-com.ibm.icu:icu4j=62.2
+com.ibm.icu:icu4j=68.2
 com.jayway.jsonpath:json-path=2.4.0
 com.lmax:disruptor=3.4.2
 com.pff:java-libpst=0.8.1