diff --git a/modules/core/test/test_arithm.cpp b/modules/core/test/test_arithm.cpp
index 8fec388df8..a240941847 100644
--- a/modules/core/test/test_arithm.cpp
+++ b/modules/core/test/test_arithm.cpp
@@ -1363,7 +1363,6 @@ TEST_P(ElemWiseTest, accuracy)
         op->op(src, dst, mask);
 
         double maxErr = op->getMaxErr(depth);
-        vector<int> pos;
         ASSERT_PRED_FORMAT2(cvtest::MatComparator(maxErr, op->context), dst0, dst) << "\nsrc[0] ~ " << cvtest::MatInfo(!src.empty() ? src[0] : Mat()) << "\ntestCase #" << testIdx << "\n";
     }
 }
diff --git a/modules/features2d/test/test_nearestneighbors.cpp b/modules/features2d/test/test_nearestneighbors.cpp
index 45131eff2e..8d1ecfd79a 100644
--- a/modules/features2d/test/test_nearestneighbors.cpp
+++ b/modules/features2d/test/test_nearestneighbors.cpp
@@ -214,8 +214,6 @@ int CV_KDTreeTest_CPP::findNeighbors( Mat& points, Mat& neighbors )
     const int emax = 20;
     Mat neighbors2( neighbors.size(), CV_32SC1 );
     int j;
-    vector<float> min(points.cols, static_cast<float>(minValue));
-    vector<float> max(points.cols, static_cast<float>(maxValue));
     for( int pi = 0; pi < points.rows; pi++ )
     {
         // 1st way
diff --git a/modules/gpu/src/cascadeclassifier.cpp b/modules/gpu/src/cascadeclassifier.cpp
index 7b95b69091..65b74a4338 100644
--- a/modules/gpu/src/cascadeclassifier.cpp
+++ b/modules/gpu/src/cascadeclassifier.cpp
@@ -778,8 +778,6 @@ NCVStatus loadFromXML(const std::string &filename,
     haar.bNeedsTiltedII = false;
     Ncv32u curMaxTreeDepth;
 
-    std::vector<char> xmlFileCont;
-
     std::vector<HaarClassifierNode128> h_TmpClassifierNotRootNodes;
     haarStages.resize(0);
     haarClassifierNodes.resize(0);
diff --git a/modules/objdetect/src/hog.cpp b/modules/objdetect/src/hog.cpp
index 41744f6d5f..c140f3bf72 100644
--- a/modules/objdetect/src/hog.cpp
+++ b/modules/objdetect/src/hog.cpp
@@ -2651,7 +2651,6 @@ void HOGDescriptor::groupRectangles(vector<cv::Rect>& rectList, vector<double>&
     vector<cv::Rect_<double> > rrects(nclasses);
     vector<int> numInClass(nclasses, 0);
     vector<double> foundWeights(nclasses, DBL_MIN);
-    vector<double> totalFactorsPerClass(nclasses, 1);
     int i, j, nlabels = (int)labels.size();
 
     for( i = 0; i < nlabels; i++ )
diff --git a/modules/ocl/perf/perf_imgproc.cpp b/modules/ocl/perf/perf_imgproc.cpp
index 05b948649c..6d859a94c0 100644
--- a/modules/ocl/perf/perf_imgproc.cpp
+++ b/modules/ocl/perf/perf_imgproc.cpp
@@ -630,7 +630,6 @@ typedef TestBaseWithParam<Size> CLAHEFixture;
 OCL_PERF_TEST_P(CLAHEFixture, CLAHE, OCL_TEST_SIZES)
 {
     const Size srcSize = GetParam();
-    const string impl = getSelectedImpl();
 
     Mat src(srcSize, CV_8UC1), dst;
     const double clipLimit = 40.0;
diff --git a/modules/ocl/src/gftt.cpp b/modules/ocl/src/gftt.cpp
index 57ed12f009..4f204d6f43 100644
--- a/modules/ocl/src/gftt.cpp
+++ b/modules/ocl/src/gftt.cpp
@@ -110,7 +110,6 @@ static void findCorners_caller(
     oclMat&         counter)        //output value with number of detected corners, have to be 0 before call
 {
     string  opt;
-    std::vector<int> k;
     Context * cxt = Context::getContext();
 
     std::vector< std::pair<size_t, const void*> > args;
diff --git a/modules/ocl/src/moments.cpp b/modules/ocl/src/moments.cpp
index f11d381c98..216e9ab29a 100644
--- a/modules/ocl/src/moments.cpp
+++ b/modules/ocl/src/moments.cpp
@@ -266,7 +266,7 @@ namespace cv
             int src_step = (int)(src.step/src.elemSize());
             int dstm_step = (int)(dst_m.step/dst_m.elemSize());
 
-            vector<pair<size_t , const void *> > args,args_sum;
+            vector<pair<size_t , const void *> > args;
             args.push_back( make_pair( sizeof(cl_mem) , (void *)&src.data ));
             args.push_back( make_pair( sizeof(cl_int) , (void *)&src.rows ));
             args.push_back( make_pair( sizeof(cl_int) , (void *)&src.cols ));
@@ -384,4 +384,4 @@ namespace cv
             return mom;
         }
     }
-}
\ No newline at end of file
+}