diff --git a/icu4c/source/i18n/dtfmtsym.cpp b/icu4c/source/i18n/dtfmtsym.cpp
index a4e36fe3b9b..30ebbebcf81 100644
--- a/icu4c/source/i18n/dtfmtsym.cpp
+++ b/icu4c/source/i18n/dtfmtsym.cpp
@@ -425,7 +425,7 @@ DateFormatSymbols::getShortMonths(int32_t &count) const
 const UnicodeString*
 DateFormatSymbols::getMonths(int32_t &count, DtContextType context, DtWidthType width ) const
 {
-    UnicodeString *returnValue;
+    UnicodeString *returnValue = NULL;
 
     switch (context) {
        case FORMAT :
@@ -481,7 +481,7 @@ DateFormatSymbols::getShortWeekdays(int32_t &count) const
 const UnicodeString*
 DateFormatSymbols::getWeekdays(int32_t &count, DtContextType context, DtWidthType width) const
 {
-    UnicodeString *returnValue;
+    UnicodeString *returnValue = NULL;
     switch (context) {
        case FORMAT :
           switch(width) {
diff --git a/icu4c/source/i18n/rbt_pars.cpp b/icu4c/source/i18n/rbt_pars.cpp
index 91f486fcc04..edb4a9edf79 100644
--- a/icu4c/source/i18n/rbt_pars.cpp
+++ b/icu4c/source/i18n/rbt_pars.cpp
@@ -876,7 +876,6 @@ void TransliteratorParser::parseRules(const UnicodeString& rule,
     status = U_ZERO_ERROR;
 
     UBool parsingIDs = TRUE;
-    UBool inBeginEndBlock = FALSE;
     int32_t ruleCount = 0;
     
     if (dataVector == NULL)
diff --git a/icu4c/source/i18n/ucol_sit.cpp b/icu4c/source/i18n/ucol_sit.cpp
index 33cd3a734b8..9d52426a497 100644
--- a/icu4c/source/i18n/ucol_sit.cpp
+++ b/icu4c/source/i18n/ucol_sit.cpp
@@ -1030,10 +1030,8 @@ static UBool U_CALLCONV
 _processSpecials(const void *context, UChar32 start, UChar32 limit, uint32_t CE) 
 {
     UErrorCode *status = ((contContext *)context)->status;
-    USet *contractions = ((contContext *)context)->conts;
     USet *expansions = ((contContext *)context)->expansions;
     USet *removed = ((contContext *)context)->removedContractions;
-    const UCollator *coll = ((contContext *)context)->coll;
     UBool addPrefixes = ((contContext *)context)->addPrefixes;
     UChar contraction[internalBufferSize];
     if(isSpecial(CE)) {
@@ -1088,7 +1086,6 @@ ucol_getContractions( const UCollator *coll,
                   USet *contractions,
                   UErrorCode *status)
 {
-  int32_t noConts = 0;
   ucol_getContractionsAndExpansions(coll, contractions, NULL, FALSE, status);
   return uset_getItemCount(contractions);
 }