diff --git a/package-lock.json b/package-lock.json
index 2eb3569e08..44731d0327 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10472,6 +10472,16 @@
         "@types/lodash": "*"
       }
     },
+    "node_modules/@types/lodash.mergewith": {
+      "version": "4.6.9",
+      "resolved": "https://registry.npmjs.org/@types/lodash.mergewith/-/lodash.mergewith-4.6.9.tgz",
+      "integrity": "sha512-fgkoCAOF47K7sxrQ7Mlud2TH023itugZs2bUg8h/KzT+BnZNrR2jAOmaokbLunHNnobXVWOezAeNn/lZqwxkcw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/lodash": "*"
+      }
+    },
     "node_modules/@types/lodash.throttle": {
       "version": "4.1.9",
       "resolved": "https://registry.npmjs.org/@types/lodash.throttle/-/lodash.throttle-4.1.9.tgz",
@@ -23061,6 +23071,12 @@
       "resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",
       "integrity": "sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ=="
     },
+    "node_modules/lodash.mergewith": {
+      "version": "4.6.2",
+      "resolved": "https://registry.npmjs.org/lodash.mergewith/-/lodash.mergewith-4.6.2.tgz",
+      "integrity": "sha512-GK3g5RPZWTRSeLSpgP8Xhra+pnjBC56q9FZYe1d5RN3TJ35dbkGy3YqBSMbyCrlbi+CM9Z3Jk5yTL7RCsqboyQ==",
+      "license": "MIT"
+    },
     "node_modules/lodash.throttle": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/lodash.throttle/-/lodash.throttle-4.1.1.tgz",
@@ -33853,9 +33869,13 @@
         "@deephaven/log": "file:../log",
         "@deephaven/plugin": "file:../plugin",
         "fast-deep-equal": "^3.1.3",
+        "lodash.mergewith": "^4.6.2",
         "proxy-memoize": "^3.0.0",
         "redux-thunk": "2.4.1"
       },
+      "devDependencies": {
+        "@types/lodash.mergewith": "^4.6.9"
+      },
       "engines": {
         "node": ">=16"
       },
diff --git a/packages/redux/package.json b/packages/redux/package.json
index 1a1641bcf7..b88e127249 100644
--- a/packages/redux/package.json
+++ b/packages/redux/package.json
@@ -27,6 +27,7 @@
     "@deephaven/log": "file:../log",
     "@deephaven/plugin": "file:../plugin",
     "fast-deep-equal": "^3.1.3",
+    "lodash.mergewith": "^4.6.2",
     "proxy-memoize": "^3.0.0",
     "redux-thunk": "2.4.1"
   },
@@ -39,5 +40,8 @@
   "sideEffects": false,
   "publishConfig": {
     "access": "public"
+  },
+  "devDependencies": {
+    "@types/lodash.mergewith": "^4.6.9"
   }
 }
diff --git a/packages/redux/src/selectors.ts b/packages/redux/src/selectors.ts
index df61392fb9..b3f077fc47 100644
--- a/packages/redux/src/selectors.ts
+++ b/packages/redux/src/selectors.ts
@@ -1,6 +1,7 @@
 import type { UndoPartial } from '@deephaven/utils';
 import { memoize } from 'proxy-memoize';
-import type { RootState, WorkspaceSettings } from './store';
+import mergeWith from 'lodash.mergewith';
+import type { RootState } from './store';
 
 const EMPTY_OBJECT = Object.freeze({});
 
@@ -61,17 +62,22 @@ export const getSettings = memoize(
     store: State
   ): UndoPartial<State['workspace']['data']['settings']> => {
     const customizedSettings = getWorkspace(store)?.data.settings ?? {};
-
-    const settings = { ...getDefaultWorkspaceSettings(store) };
-    const keys = Object.keys(customizedSettings) as (keyof WorkspaceSettings)[];
-    for (let i = 0; i < keys.length; i += 1) {
-      const key = keys[i];
-      if (customizedSettings[key] !== undefined) {
-        // @ts-expect-error assign non-undefined customized settings to settings
-        settings[key] = customizedSettings[key];
+    const defaultSettings = getDefaultWorkspaceSettings(store);
+
+    // Deep merge settings but replace arrays instead of merging them
+    const newSettings = mergeWith(
+      {},
+      defaultSettings,
+      customizedSettings,
+      (objValue: unknown, srcValue: unknown) => {
+        if (Array.isArray(objValue) && Array.isArray(srcValue)) {
+          return srcValue;
+        }
+        return undefined;
       }
-    }
-    return settings as UndoPartial<State['workspace']['data']['settings']>;
+    ) as UndoPartial<State['workspace']['data']['settings']>;
+
+    return newSettings;
   }
 );