diff --git a/packages/muelu/src/Headers/MueLu_UseShortNamesScalar.hpp b/packages/muelu/src/Headers/MueLu_UseShortNamesScalar.hpp
index b094106158d5..a5bf3f68b544 100644
--- a/packages/muelu/src/Headers/MueLu_UseShortNamesScalar.hpp
+++ b/packages/muelu/src/Headers/MueLu_UseShortNamesScalar.hpp
@@ -218,9 +218,6 @@ using NotayAggregationFactory [[maybe_unused]] = MueLu::NotayAggregationFactory<
 #ifdef MUELU_NULLSPACEFACTORY_SHORT
 using NullspaceFactory [[maybe_unused]] = MueLu::NullspaceFactory<Scalar, LocalOrdinal, GlobalOrdinal, Node>;
 #endif
-#ifdef MUELU_NULLSPACEFACTORY_KOKKOS_SHORT
-using NullspaceFactory_kokkos [[maybe_unused]] = MueLu::NullspaceFactory_kokkos<Scalar, LocalOrdinal, GlobalOrdinal, Node>;
-#endif
 #ifdef MUELU_NULLSPACEPRESMOOTHFACTORY_SHORT
 using NullspacePresmoothFactory [[maybe_unused]] = MueLu::NullspacePresmoothFactory<Scalar, LocalOrdinal, GlobalOrdinal, Node>;
 #endif
diff --git a/packages/muelu/src/Interface/MueLu_FactoryFactory_decl.hpp b/packages/muelu/src/Interface/MueLu_FactoryFactory_decl.hpp
index a6c6add07da2..5176bc2fb677 100644
--- a/packages/muelu/src/Interface/MueLu_FactoryFactory_decl.hpp
+++ b/packages/muelu/src/Interface/MueLu_FactoryFactory_decl.hpp
@@ -126,7 +126,6 @@
 #include "MueLu_CoalesceDropFactory_kokkos_fwd.hpp"
 #include "MueLu_GeometricInterpolationPFactory_kokkos_fwd.hpp"
 #ifdef HAVE_MUELU_DEPRECATED_CODE
-#include "MueLu_NullspaceFactory_kokkos_fwd.hpp"
 #include "MueLu_SaPFactory_kokkos_fwd.hpp"
 #endif
 #include "MueLu_SemiCoarsenPFactory_kokkos_fwd.hpp"
diff --git a/packages/muelu/src/Interface/MueLu_FactoryFactory_def.hpp b/packages/muelu/src/Interface/MueLu_FactoryFactory_def.hpp
index cc144b4366fe..0694928ceceb 100644
--- a/packages/muelu/src/Interface/MueLu_FactoryFactory_def.hpp
+++ b/packages/muelu/src/Interface/MueLu_FactoryFactory_def.hpp
@@ -105,7 +105,6 @@
 #include "MueLu_CoalesceDropFactory_kokkos.hpp"
 #include "MueLu_GeometricInterpolationPFactory_kokkos.hpp"
 #ifdef HAVE_MUELU_DEPRECATED_CODE
-#include "MueLu_NullspaceFactory_kokkos.hpp"
 #include "MueLu_SaPFactory_kokkos.hpp"
 #endif
 #include "MueLu_SemiCoarsenPFactory_kokkos.hpp"
@@ -216,7 +215,6 @@ RCP<const FactoryBase> FactoryFactory<Scalar, LocalOrdinal, GlobalOrdinal, Node>
   if (factoryName == "CoalesceDropFactory_kokkos") return Build2<CoalesceDropFactory_kokkos>(paramList, factoryMapIn, factoryManagersIn);
   if (factoryName == "GeometricInterpolationPFactory_kokkos") return Build2<GeometricInterpolationPFactory_kokkos>(paramList, factoryMapIn, factoryManagersIn);
 #ifdef HAVE_MUELU_DEPRECATED_CODE
-  if (factoryName == "NullspaceFactory_kokkos") return Build2<NullspaceFactory_kokkos>(paramList, factoryMapIn, factoryManagersIn);
   if (factoryName == "SaPFactory_kokkos") return Build2<SaPFactory_kokkos>(paramList, factoryMapIn, factoryManagersIn);
 #endif
   if (factoryName == "SemiCoarsenPFactory_kokkos") return Build2<SemiCoarsenPFactory_kokkos>(paramList, factoryMapIn, factoryManagersIn);
diff --git a/packages/muelu/src/Transfers/Smoothed-Aggregation/MueLu_NullspaceFactory_kokkos_decl.hpp b/packages/muelu/src/Transfers/Smoothed-Aggregation/MueLu_NullspaceFactory_kokkos_decl.hpp
deleted file mode 100644
index 82fd49a91699..000000000000
--- a/packages/muelu/src/Transfers/Smoothed-Aggregation/MueLu_NullspaceFactory_kokkos_decl.hpp
+++ /dev/null
@@ -1,23 +0,0 @@
-// @HEADER
-// *****************************************************************************
-//        MueLu: A package for multigrid based preconditioning
-//
-// Copyright 2012 NTESS and the MueLu contributors.
-// SPDX-License-Identifier: BSD-3-Clause
-// *****************************************************************************
-// @HEADER
-
-#ifndef MUELU_NULLSPACEFACTORY_KOKKOS_DECL_HPP
-#define MUELU_NULLSPACEFACTORY_KOKKOS_DECL_HPP
-
-#include "MueLu_NullspaceFactory.hpp"
-
-namespace MueLu {
-
-template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
-class [[deprecated]] NullspaceFactory_kokkos : public NullspaceFactory<Scalar, LocalOrdinal, GlobalOrdinal, Node> {};
-
-}  // namespace MueLu
-
-#define MUELU_NULLSPACEFACTORY_KOKKOS_SHORT
-#endif  // MUELU_NULLSPACEFACTORY_KOKKOS_DECL_HPP
diff --git a/packages/muelu/src/Transfers/Smoothed-Aggregation/MueLu_NullspaceFactory_kokkos_def.hpp b/packages/muelu/src/Transfers/Smoothed-Aggregation/MueLu_NullspaceFactory_kokkos_def.hpp
deleted file mode 100644
index bad8376962c7..000000000000
--- a/packages/muelu/src/Transfers/Smoothed-Aggregation/MueLu_NullspaceFactory_kokkos_def.hpp
+++ /dev/null
@@ -1,15 +0,0 @@
-// @HEADER
-// *****************************************************************************
-//        MueLu: A package for multigrid based preconditioning
-//
-// Copyright 2012 NTESS and the MueLu contributors.
-// SPDX-License-Identifier: BSD-3-Clause
-// *****************************************************************************
-// @HEADER
-
-#ifndef MUELU_NULLSPACEFACTORY_KOKKOS_DEF_HPP
-#define MUELU_NULLSPACEFACTORY_KOKKOS_DEF_HPP
-
-#include "MueLu_NullspaceFactory_kokkos_decl.hpp"
-
-#endif  // MUELU_NULLSPACEFACTORY_KOKKOS_DEF_HPP
diff --git a/packages/muelu/src/Utils/ClassList/SC-LO-GO-NO.classList b/packages/muelu/src/Utils/ClassList/SC-LO-GO-NO.classList
index e00acf6f5b63..c606287c8edf 100644
--- a/packages/muelu/src/Utils/ClassList/SC-LO-GO-NO.classList
+++ b/packages/muelu/src/Utils/ClassList/SC-LO-GO-NO.classList
@@ -67,7 +67,6 @@ MergedSmoother
 MultiVectorTransferFactory
 NotayAggregationFactory
 NullspaceFactory
-NullspaceFactory_kokkos - #if defined(HAVE_MUELU_DEPRECATED_CODE)
 NullspacePresmoothFactory
 ParameterListInterpreter
 PatternFactory
diff --git a/packages/muelu/src/Utils/ExplicitInstantiation/ETI_SC_LO_GO_NO_classes.cmake b/packages/muelu/src/Utils/ExplicitInstantiation/ETI_SC_LO_GO_NO_classes.cmake
index 9b9aeff30d1e..20dc4095f4f0 100644
--- a/packages/muelu/src/Utils/ExplicitInstantiation/ETI_SC_LO_GO_NO_classes.cmake
+++ b/packages/muelu/src/Utils/ExplicitInstantiation/ETI_SC_LO_GO_NO_classes.cmake
@@ -66,7 +66,6 @@ APPEND_SET(MUELU_SC_LO_GO_NO_ETI_CLASSES MueLu::MergedSmoother )
 APPEND_SET(MUELU_SC_LO_GO_NO_ETI_CLASSES MueLu::MultiVectorTransferFactory )
 APPEND_SET(MUELU_SC_LO_GO_NO_ETI_CLASSES MueLu::NotayAggregationFactory )
 APPEND_SET(MUELU_SC_LO_GO_NO_ETI_CLASSES MueLu::NullspaceFactory )
-APPEND_SET(MUELU_SC_LO_GO_NO_ETI_CLASSES MueLu::NullspaceFactory_kokkos-.?if.defined[HAVE_MUELU_DEPRECATED_CODE] )
 APPEND_SET(MUELU_SC_LO_GO_NO_ETI_CLASSES MueLu::NullspacePresmoothFactory )
 APPEND_SET(MUELU_SC_LO_GO_NO_ETI_CLASSES MueLu::ParameterListInterpreter )
 APPEND_SET(MUELU_SC_LO_GO_NO_ETI_CLASSES MueLu::PatternFactory )
diff --git a/packages/muelu/src/Utils/ForwardDeclaration/MueLu_NullspaceFactory_kokkos_fwd.hpp b/packages/muelu/src/Utils/ForwardDeclaration/MueLu_NullspaceFactory_kokkos_fwd.hpp
deleted file mode 100644
index 805c7ee1970f..000000000000
--- a/packages/muelu/src/Utils/ForwardDeclaration/MueLu_NullspaceFactory_kokkos_fwd.hpp
+++ /dev/null
@@ -1,27 +0,0 @@
-// @HEADER
-// *****************************************************************************
-//        MueLu: A package for multigrid based preconditioning
-//
-// Copyright 2012 NTESS and the MueLu contributors.
-// SPDX-License-Identifier: BSD-3-Clause
-// *****************************************************************************
-// @HEADER
-
-#ifndef MUELU_NULLSPACEFACTORY_KOKKOS_FWD_HPP
-#define MUELU_NULLSPACEFACTORY_KOKKOS_FWD_HPP
-
-#include "MueLu_ConfigDefs.hpp"
-#if defined(HAVE_MUELU_DEPRECATED_CODE)
-
-namespace MueLu {
-template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
-class NullspaceFactory_kokkos;
-}
-
-#ifndef MUELU_NULLSPACEFACTORY_KOKKOS_SHORT
-#define MUELU_NULLSPACEFACTORY_KOKKOS_SHORT
-#endif
-
-#endif
-
-#endif  // MUELU_NULLSPACEFACTORY_KOKKOS_FWD_HPP