diff --git a/src/bench/bench_bitcoin.cpp b/src/bench/bench_bitcoin.cpp
--- a/src/bench/bench_bitcoin.cpp
+++ b/src/bench/bench_bitcoin.cpp
@@ -69,6 +69,14 @@
     gArgs.AddArg("-help", "", false, OptionsCategory::HIDDEN);
 }
 
+static fs::path SetDataDir() {
+    fs::path ret =
+        fs::temp_directory_path() / "bench_bitcoin" / fs::unique_path();
+    fs::create_directories(ret);
+    gArgs.ForceSetArg("-datadir", ret.string());
+    return ret;
+}
+
 int main(int argc, char **argv) {
     SetupBenchArgs();
     std::string error;
@@ -83,6 +91,9 @@
         return EXIT_SUCCESS;
     }
 
+    // Set the datadir after parsing the bench options
+    const fs::path bench_datadir{SetDataDir()};
+
     SHA256AutoDetect();
     ECC_Start();
     SetupEnvironment();
@@ -112,6 +123,8 @@
     benchmark::BenchRunner::RunAll(*printer, evaluations, scaling_factor,
                                    regex_filter, is_list_only);
 
+    fs::remove_all(bench_datadir);
+
     ECC_Stop();
 
     return EXIT_SUCCESS;