diff --git a/src/bench/CMakeLists.txt b/src/bench/CMakeLists.txt
--- a/src/bench/CMakeLists.txt
+++ b/src/bench/CMakeLists.txt
@@ -52,6 +52,7 @@
 	mempool_eviction.cpp
 	mempool_stress.cpp
 	merkle_root.cpp
+	poly1305.cpp
 	prevector.cpp
 	rollingbloom.cpp
 	rpc_blockchain.cpp
diff --git a/src/bench/poly1305.cpp b/src/bench/poly1305.cpp
new file mode 100644
--- /dev/null
+++ b/src/bench/poly1305.cpp
@@ -0,0 +1,37 @@
+// Copyright (c) 2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <iostream>
+
+#include <bench/bench.h>
+#include <crypto/poly1305.h>
+
+/* Number of bytes to process per iteration */
+static constexpr uint64_t BUFFER_SIZE_TINY = 64;
+static constexpr uint64_t BUFFER_SIZE_SMALL = 256;
+static constexpr uint64_t BUFFER_SIZE_LARGE = 1024 * 1024;
+
+static void POLY1305(benchmark::State &state, size_t buffersize) {
+    std::vector<uint8_t> tag(POLY1305_TAGLEN, 0);
+    std::vector<uint8_t> key(POLY1305_KEYLEN, 0);
+    std::vector<uint8_t> in(buffersize, 0);
+    while (state.KeepRunning())
+        poly1305_auth(tag.data(), in.data(), in.size(), key.data());
+}
+
+static void POLY1305_64BYTES(benchmark::State &state) {
+    POLY1305(state, BUFFER_SIZE_TINY);
+}
+
+static void POLY1305_256BYTES(benchmark::State &state) {
+    POLY1305(state, BUFFER_SIZE_SMALL);
+}
+
+static void POLY1305_1MB(benchmark::State &state) {
+    POLY1305(state, BUFFER_SIZE_LARGE);
+}
+
+BENCHMARK(POLY1305_64BYTES, 500000);
+BENCHMARK(POLY1305_256BYTES, 250000);
+BENCHMARK(POLY1305_1MB, 340);