diff --git a/icu4c/source/common/scsu.c b/icu4c/source/common/scsu.c
index 0951155657..61af69c909 100644
--- a/icu4c/source/common/scsu.c
+++ b/icu4c/source/common/scsu.c
@@ -16,8 +16,6 @@
 *******************************************************************************
 */
 
-#include <limits.h>
-
 #include "unicode/scsu.h"
 
 #include "cmemory.h"
diff --git a/icu4c/source/i18n/decimfmt.cpp b/icu4c/source/i18n/decimfmt.cpp
index 216dc4787b..de9a0d9281 100644
--- a/icu4c/source/i18n/decimfmt.cpp
+++ b/icu4c/source/i18n/decimfmt.cpp
@@ -43,8 +43,6 @@
 #include "unicode/resbund.h"
 #include "unicode/unicode.h"
 #include "cmemory.h"
-#include <float.h>
-#include <limits.h>
 
 // #define DEBUG
 
diff --git a/icu4c/source/test/intltest/calregts.cpp b/icu4c/source/test/intltest/calregts.cpp
index 82fa979f5b..a6195f4501 100644
--- a/icu4c/source/test/intltest/calregts.cpp
+++ b/icu4c/source/test/intltest/calregts.cpp
@@ -11,7 +11,6 @@
 #include "unicode/smpdtfmt.h"
 
 #include <float.h>
-#include <limits.h> // LONG_{MIN,MAX}
 
 // *****************************************************************************
 // class CalendarRegressionTest
diff --git a/icu4c/source/test/intltest/numrgts.cpp b/icu4c/source/test/intltest/numrgts.cpp
index b668dc827a..985d29d125 100644
--- a/icu4c/source/test/intltest/numrgts.cpp
+++ b/icu4c/source/test/intltest/numrgts.cpp
@@ -8,7 +8,6 @@
 
 #include <stdio.h> // sprintf
 #include <float.h> // DBL_MIN, DBL_MAX
-#include <limits.h> // LONG_MIN, LONG_MAX
 
 #include "unicode/dcfmtsym.h"
 #include "unicode/decimfmt.h"
diff --git a/icu4c/source/test/intltest/restest.cpp b/icu4c/source/test/intltest/restest.cpp
index 6d2e73a79f..2f1e998544 100644
--- a/icu4c/source/test/intltest/restest.cpp
+++ b/icu4c/source/test/intltest/restest.cpp
@@ -7,7 +7,6 @@
 #include <stdlib.h>
 #include <time.h>
 #include <string.h>
-#include <limits.h>
 
 #define RESTEST_HEAP_CHECK 0
 
diff --git a/icu4c/source/test/intltest/restsnew.cpp b/icu4c/source/test/intltest/restsnew.cpp
index 6c747b3b12..95156af120 100644
--- a/icu4c/source/test/intltest/restsnew.cpp
+++ b/icu4c/source/test/intltest/restsnew.cpp
@@ -7,7 +7,6 @@
 #include <stdlib.h>
 #include <time.h>
 #include <string.h>
-#include <limits.h>
 
 #define RESTEST_HEAP_CHECK 0
 
diff --git a/icu4c/source/test/intltest/tmsgfmt.cpp b/icu4c/source/test/intltest/tmsgfmt.cpp
index 7163c88f54..64a5c2e5cf 100644
--- a/icu4c/source/test/intltest/tmsgfmt.cpp
+++ b/icu4c/source/test/intltest/tmsgfmt.cpp
@@ -203,7 +203,6 @@ void TestMessageFormat::testBug2()
 #endif
 
 #include "unicode/datefmt.h"
-#include <limits.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/icu4c/source/test/intltest/tsnmfmt.cpp b/icu4c/source/test/intltest/tsnmfmt.cpp
index 733603e68e..c7e6d9418a 100644
--- a/icu4c/source/test/intltest/tsnmfmt.cpp
+++ b/icu4c/source/test/intltest/tsnmfmt.cpp
@@ -9,10 +9,6 @@
 
 #include "unicode/decimfmt.h"
 
-#include <math.h>
-#include <float.h>
-#include <limits.h>
-
 static const char * formattableTypeName(Formattable::Type t)
 {
   switch(t) {
diff --git a/icu4c/source/test/intltest/tzregts.cpp b/icu4c/source/test/intltest/tzregts.cpp
index 42032e0df1..37ceaba1fd 100644
--- a/icu4c/source/test/intltest/tzregts.cpp
+++ b/icu4c/source/test/intltest/tzregts.cpp
@@ -11,8 +11,6 @@
 #include "unicode/simpletz.h"
 #include "unicode/smpdtfmt.h"
 
-#include <limits.h>
-
 // *****************************************************************************
 // class TimeZoneRegressionTest
 // *****************************************************************************