diff --git a/.changeset/remove-unused-deps.md b/.changeset/remove-unused-deps.md
new file mode 100644
index 0000000000..028021bd28
--- /dev/null
+++ b/.changeset/remove-unused-deps.md
@@ -0,0 +1,22 @@
+---
+'@backstage/core-components': patch
+'@backstage/plugin-app-backend': patch
+'@backstage/plugin-catalog': patch
+'@backstage/plugin-catalog-backend-module-gitlab': patch
+'@backstage/plugin-catalog-backend-module-incremental-ingestion': patch
+'@backstage/plugin-catalog-graph': patch
+'@backstage/plugin-devtools-backend': patch
+'@backstage/plugin-kubernetes-node': patch
+'@backstage/plugin-notifications-common': patch
+'@backstage/plugin-notifications-node': patch
+'@backstage/plugin-permission-backend': patch
+'@backstage/plugin-scaffolder-backend-module-cookiecutter': patch
+'@backstage/plugin-scaffolder-backend-module-yeoman': patch
+'@backstage/plugin-search-backend': patch
+'@backstage/plugin-signals-node': patch
+'@backstage/plugin-techdocs-react': patch
+'@backstage/plugin-user-settings-backend': patch
+'@techdocs/cli': patch
+---
+
+Removed unused dependencies that had no imports in source code.
diff --git a/packages/core-components/package.json b/packages/core-components/package.json
index 2b7c44f5a7..a479b8f20c 100644
--- a/packages/core-components/package.json
+++ b/packages/core-components/package.json
@@ -78,7 +78,6 @@
     "linkifyjs": "4.3.2",
     "lodash": "^4.17.21",
     "parse5": "^6.0.0",
-    "pluralize": "^8.0.0",
     "qs": "^6.9.4",
     "rc-progress": "3.5.1",
     "react-full-screen": "^1.1.1",
diff --git a/packages/techdocs-cli/package.json b/packages/techdocs-cli/package.json
index d9eee8b926..1e2419fa60 100644
--- a/packages/techdocs-cli/package.json
+++ b/packages/techdocs-cli/package.json
@@ -51,7 +51,6 @@
     "@backstage/plugin-techdocs-node": "workspace:^",
     "commander": "^14.0.3",
     "fs-extra": "^11.0.0",
-    "global-agent": "^3.0.0",
     "http-proxy": "^1.18.1",
     "react-dev-utils": "^12.0.0-next.60",
     "serve-handler": "^6.1.3",
diff --git a/plugins/app-backend/package.json b/plugins/app-backend/package.json
index 271170a4b9..eae2ad7bfc 100644
--- a/plugins/app-backend/package.json
+++ b/plugins/app-backend/package.json
@@ -68,8 +68,7 @@
     "helmet": "^6.0.0",
     "knex": "^3.0.0",
     "lodash": "^4.17.21",
-    "luxon": "^3.0.0",
-    "yn": "^4.0.0"
+    "luxon": "^3.0.0"
   },
   "devDependencies": {
     "@backstage/backend-app-api": "workspace:^",
diff --git a/plugins/catalog-backend-module-gitlab/package.json b/plugins/catalog-backend-module-gitlab/package.json
index ab6d76f4f5..454568af48 100644
--- a/plugins/catalog-backend-module-gitlab/package.json
+++ b/plugins/catalog-backend-module-gitlab/package.json
@@ -62,7 +62,6 @@
     "@backstage/plugin-events-node": "workspace:^",
     "@gitbeaker/rest": "^40.0.3",
     "lodash": "^4.17.21",
-    "node-fetch": "^2.7.0",
     "uuid": "^11.0.0"
   },
   "devDependencies": {
diff --git a/plugins/catalog-backend-module-incremental-ingestion/package.json b/plugins/catalog-backend-module-incremental-ingestion/package.json
index 12214b3e5c..30a13072a0 100644
--- a/plugins/catalog-backend-module-incremental-ingestion/package.json
+++ b/plugins/catalog-backend-module-incremental-ingestion/package.json
@@ -55,7 +55,6 @@
     "@backstage/plugin-catalog-backend": "workspace:^",
     "@backstage/plugin-catalog-node": "workspace:^",
     "@backstage/plugin-events-node": "workspace:^",
-    "@backstage/plugin-permission-common": "workspace:^",
     "@backstage/types": "workspace:^",
     "express": "^4.22.0",
     "express-promise-router": "^4.1.0",
diff --git a/plugins/catalog-graph/package.json b/plugins/catalog-graph/package.json
index afeb04d75f..e3dcba154c 100644
--- a/plugins/catalog-graph/package.json
+++ b/plugins/catalog-graph/package.json
@@ -63,7 +63,6 @@
     "@remixicon/react": "^4.6.0",
     "classnames": "^2.3.1",
     "lodash": "^4.17.15",
-    "p-limit": "^3.1.0",
     "qs": "^6.9.4",
     "react-use": "^17.2.4",
     "zod": "^3.25.76 || ^4.0.0"
diff --git a/plugins/catalog/package.json b/plugins/catalog/package.json
index 85d5450914..39e1b6739d 100644
--- a/plugins/catalog/package.json
+++ b/plugins/catalog/package.json
@@ -83,7 +83,6 @@
     "@mui/utils": "^5.14.15",
     "classnames": "^2.3.1",
     "dataloader": "^2.0.0",
-    "history": "^5.0.0",
     "lodash": "^4.17.21",
     "pluralize": "^8.0.0",
     "react-helmet": "6.1.0",
diff --git a/plugins/devtools-backend/package.json b/plugins/devtools-backend/package.json
index 0c833ae969..7730a74f57 100644
--- a/plugins/devtools-backend/package.json
+++ b/plugins/devtools-backend/package.json
@@ -55,9 +55,7 @@
     "express-promise-router": "^4.1.0",
     "fs-extra": "^11.0.0",
     "lodash": "^4.17.21",
-    "ping": "^0.4.1",
-    "semver": "^7.5.3",
-    "yn": "^4.0.0"
+    "ping": "^0.4.1"
   },
   "devDependencies": {
     "@backstage/backend-defaults": "workspace:^",
diff --git a/plugins/kubernetes-node/package.json b/plugins/kubernetes-node/package.json
index 78c5233ee9..75f0dcf08f 100644
--- a/plugins/kubernetes-node/package.json
+++ b/plugins/kubernetes-node/package.json
@@ -44,8 +44,7 @@
     "@backstage/types": "workspace:^",
     "@kubernetes/client-node": "1.4.0",
     "@types/express": "^4.17.6",
-    "node-fetch": "^2.7.0",
-    "winston": "^3.2.1"
+    "node-fetch": "^2.7.0"
   },
   "devDependencies": {
     "@backstage/backend-app-api": "workspace:^",
diff --git a/plugins/notifications-common/package.json b/plugins/notifications-common/package.json
index bbe98ff8ff..ce9a701721 100644
--- a/plugins/notifications-common/package.json
+++ b/plugins/notifications-common/package.json
@@ -40,8 +40,7 @@
   },
   "dependencies": {
     "@backstage/config": "workspace:^",
-    "@backstage/types": "workspace:^",
-    "@material-ui/icons": "^4.9.1"
+    "@backstage/types": "workspace:^"
   },
   "devDependencies": {
     "@backstage/cli": "workspace:^"
diff --git a/plugins/notifications-node/package.json b/plugins/notifications-node/package.json
index 491c2792f0..da90bb87a3 100644
--- a/plugins/notifications-node/package.json
+++ b/plugins/notifications-node/package.json
@@ -38,12 +38,7 @@
   },
   "dependencies": {
     "@backstage/backend-plugin-api": "workspace:^",
-    "@backstage/catalog-client": "workspace:^",
-    "@backstage/catalog-model": "workspace:^",
-    "@backstage/plugin-notifications-common": "workspace:^",
-    "@backstage/plugin-signals-node": "workspace:^",
-    "knex": "^3.0.0",
-    "uuid": "^11.0.0"
+    "@backstage/plugin-notifications-common": "workspace:^"
   },
   "devDependencies": {
     "@backstage/backend-test-utils": "workspace:^",
diff --git a/plugins/permission-backend/package.json b/plugins/permission-backend/package.json
index 0832869b92..a89036f1e8 100644
--- a/plugins/permission-backend/package.json
+++ b/plugins/permission-backend/package.json
@@ -61,7 +61,6 @@
     "express": "^4.22.0",
     "express-promise-router": "^4.1.0",
     "lodash": "^4.17.21",
-    "yn": "^4.0.0",
     "zod": "^3.25.76 || ^4.0.0"
   },
   "devDependencies": {
diff --git a/plugins/scaffolder-backend-module-cookiecutter/package.json b/plugins/scaffolder-backend-module-cookiecutter/package.json
index b01f62285a..037c493fb3 100644
--- a/plugins/scaffolder-backend-module-cookiecutter/package.json
+++ b/plugins/scaffolder-backend-module-cookiecutter/package.json
@@ -43,18 +43,14 @@
     "test": "backstage-cli package test"
   },
   "dependencies": {
-    "@backstage/backend-defaults": "workspace:^",
     "@backstage/backend-plugin-api": "workspace:^",
-    "@backstage/config": "workspace:^",
     "@backstage/errors": "workspace:^",
     "@backstage/integration": "workspace:^",
     "@backstage/plugin-scaffolder-node": "workspace:^",
     "@backstage/types": "workspace:^",
     "command-exists": "^1.2.9",
     "fs-extra": "^11.2.0",
-    "winston": "^3.2.1",
-    "yaml": "^2.0.0",
-    "yn": "^4.0.0"
+    "yaml": "^2.0.0"
   },
   "devDependencies": {
     "@backstage/backend-test-utils": "workspace:^",
diff --git a/plugins/scaffolder-backend-module-yeoman/package.json b/plugins/scaffolder-backend-module-yeoman/package.json
index d0b7af0b5d..3d79b4d190 100644
--- a/plugins/scaffolder-backend-module-yeoman/package.json
+++ b/plugins/scaffolder-backend-module-yeoman/package.json
@@ -46,7 +46,6 @@
     "@backstage/plugin-scaffolder-node": "workspace:^",
     "@backstage/plugin-scaffolder-node-test-utils": "workspace:^",
     "@backstage/types": "workspace:^",
-    "winston": "^3.2.1",
     "yaml": "^2.0.0",
     "yeoman-environment": "^3.9.1"
   },
diff --git a/plugins/search-backend/package.json b/plugins/search-backend/package.json
index d3775d06b0..07860afe25 100644
--- a/plugins/search-backend/package.json
+++ b/plugins/search-backend/package.json
@@ -69,7 +69,6 @@
     "express": "^4.22.0",
     "lodash": "^4.17.21",
     "qs": "^6.10.1",
-    "yn": "^4.0.0",
     "zod": "^3.25.76 || ^4.0.0"
   },
   "devDependencies": {
diff --git a/plugins/signals-node/package.json b/plugins/signals-node/package.json
index f6947ab86f..96b91be214 100644
--- a/plugins/signals-node/package.json
+++ b/plugins/signals-node/package.json
@@ -38,13 +38,8 @@
   },
   "dependencies": {
     "@backstage/backend-plugin-api": "workspace:^",
-    "@backstage/config": "workspace:^",
-    "@backstage/plugin-auth-node": "workspace:^",
     "@backstage/plugin-events-node": "workspace:^",
-    "@backstage/types": "workspace:^",
-    "express": "^4.22.0",
-    "uuid": "^11.0.0",
-    "ws": "^8.18.0"
+    "@backstage/types": "workspace:^"
   },
   "devDependencies": {
     "@backstage/cli": "workspace:^",
diff --git a/plugins/techdocs-react/package.json b/plugins/techdocs-react/package.json
index 5df6bf7bf5..ce46de2f3b 100644
--- a/plugins/techdocs-react/package.json
+++ b/plugins/techdocs-react/package.json
@@ -69,7 +69,6 @@
     "@material-ui/styles": "^4.11.0",
     "jss": "~10.10.0",
     "lodash": "^4.17.21",
-    "react-helmet": "6.1.0",
     "react-use": "^17.2.4"
   },
   "devDependencies": {
diff --git a/plugins/user-settings-backend/package.json b/plugins/user-settings-backend/package.json
index 0f9a369318..3ad90af0e5 100644
--- a/plugins/user-settings-backend/package.json
+++ b/plugins/user-settings-backend/package.json
@@ -54,7 +54,6 @@
     "@backstage/plugin-signals-node": "workspace:^",
     "@backstage/plugin-user-settings-common": "workspace:^",
     "@backstage/types": "workspace:^",
-    "already": "^2.2.1",
     "express": "^4.22.0",
     "express-promise-router": "^4.1.0",
     "knex": "^3.0.0",
diff --git a/yarn.lock b/yarn.lock
index 3e2b173d84..5ae95bf720 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3493,7 +3493,6 @@ __metadata:
     lodash: "npm:^4.17.21"
     msw: "npm:^1.0.0"
     parse5: "npm:^6.0.0"
-    pluralize: "npm:^8.0.0"
     qs: "npm:^6.9.4"
     rc-progress: "npm:3.5.1"
     react: "npm:^18.0.2"
@@ -4081,7 +4080,6 @@ __metadata:
     lodash: "npm:^4.17.21"
     luxon: "npm:^3.0.0"
     supertest: "npm:^7.0.0"
-    yn: "npm:^4.0.0"
   languageName: unknown
   linkType: soft
 
@@ -5011,7 +5009,6 @@ __metadata:
     "@types/lodash": "npm:^4.14.151"
     lodash: "npm:^4.17.21"
     msw: "npm:^1.0.0"
-    node-fetch: "npm:^2.7.0"
     uuid: "npm:^11.0.0"
   languageName: unknown
   linkType: soft
@@ -5030,7 +5027,6 @@ __metadata:
     "@backstage/plugin-catalog-backend": "workspace:^"
     "@backstage/plugin-catalog-node": "workspace:^"
     "@backstage/plugin-events-node": "workspace:^"
-    "@backstage/plugin-permission-common": "workspace:^"
     "@backstage/types": "workspace:^"
     "@types/express": "npm:^4.17.6"
     express: "npm:^4.22.0"
@@ -5262,7 +5258,6 @@ __metadata:
     "@types/react": "npm:^18.0.0"
     classnames: "npm:^2.3.1"
     lodash: "npm:^4.17.15"
-    p-limit: "npm:^3.1.0"
     qs: "npm:^6.9.4"
     react: "npm:^18.0.2"
     react-dom: "npm:^18.0.2"
@@ -5506,7 +5501,6 @@ __metadata:
     "@types/react": "npm:^18.0.0"
     classnames: "npm:^2.3.1"
     dataloader: "npm:^2.0.0"
-    history: "npm:^5.0.0"
     lodash: "npm:^4.17.21"
     pluralize: "npm:^8.0.0"
     react: "npm:^18.0.2"
@@ -5590,9 +5584,7 @@ __metadata:
     fs-extra: "npm:^11.0.0"
     lodash: "npm:^4.17.21"
     ping: "npm:^0.4.1"
-    semver: "npm:^7.5.3"
     supertest: "npm:^7.0.0"
-    yn: "npm:^4.0.0"
   languageName: unknown
   linkType: soft
 
@@ -6067,7 +6059,6 @@ __metadata:
     msw: "npm:^1.3.1"
     node-fetch: "npm:^2.7.0"
     supertest: "npm:^7.0.0"
-    winston: "npm:^3.2.1"
   languageName: unknown
   linkType: soft
 
@@ -6295,7 +6286,6 @@ __metadata:
     "@backstage/cli": "workspace:^"
     "@backstage/config": "workspace:^"
     "@backstage/types": "workspace:^"
-    "@material-ui/icons": "npm:^4.9.1"
   languageName: unknown
   linkType: soft
 
@@ -6305,15 +6295,10 @@ __metadata:
   dependencies:
     "@backstage/backend-plugin-api": "workspace:^"
     "@backstage/backend-test-utils": "workspace:^"
-    "@backstage/catalog-client": "workspace:^"
-    "@backstage/catalog-model": "workspace:^"
     "@backstage/cli": "workspace:^"
     "@backstage/plugin-notifications-common": "workspace:^"
-    "@backstage/plugin-signals-node": "workspace:^"
     "@backstage/test-utils": "workspace:^"
-    knex: "npm:^3.0.0"
     msw: "npm:^1.0.0"
-    uuid: "npm:^11.0.0"
   languageName: unknown
   linkType: soft
 
@@ -6476,7 +6461,6 @@ __metadata:
     lodash: "npm:^4.17.21"
     msw: "npm:^1.0.0"
     supertest: "npm:^7.0.0"
-    yn: "npm:^4.0.0"
     zod: "npm:^3.25.76 || ^4.0.0"
   languageName: unknown
   linkType: soft
@@ -6660,11 +6644,9 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@backstage/plugin-scaffolder-backend-module-cookiecutter@workspace:plugins/scaffolder-backend-module-cookiecutter"
   dependencies:
-    "@backstage/backend-defaults": "workspace:^"
     "@backstage/backend-plugin-api": "workspace:^"
     "@backstage/backend-test-utils": "workspace:^"
     "@backstage/cli": "workspace:^"
-    "@backstage/config": "workspace:^"
     "@backstage/errors": "workspace:^"
     "@backstage/integration": "workspace:^"
     "@backstage/plugin-scaffolder-node": "workspace:^"
@@ -6674,9 +6656,7 @@ __metadata:
     "@types/fs-extra": "npm:^11.0.0"
     command-exists: "npm:^1.2.9"
     fs-extra: "npm:^11.2.0"
-    winston: "npm:^3.2.1"
     yaml: "npm:^2.0.0"
-    yn: "npm:^4.0.0"
   languageName: unknown
   linkType: soft
 
@@ -6840,7 +6820,6 @@ __metadata:
     "@backstage/plugin-scaffolder-node": "workspace:^"
     "@backstage/plugin-scaffolder-node-test-utils": "workspace:^"
     "@backstage/types": "workspace:^"
-    winston: "npm:^3.2.1"
     yaml: "npm:^2.0.0"
     yeoman-environment: "npm:^3.9.1"
   languageName: unknown
@@ -7297,7 +7276,6 @@ __metadata:
     lodash: "npm:^4.17.21"
     qs: "npm:^6.10.1"
     supertest: "npm:^7.0.0"
-    yn: "npm:^4.0.0"
     zod: "npm:^3.25.76 || ^4.0.0"
   languageName: unknown
   linkType: soft
@@ -7430,14 +7408,9 @@ __metadata:
   dependencies:
     "@backstage/backend-plugin-api": "workspace:^"
     "@backstage/cli": "workspace:^"
-    "@backstage/config": "workspace:^"
-    "@backstage/plugin-auth-node": "workspace:^"
     "@backstage/plugin-events-node": "workspace:^"
     "@backstage/types": "workspace:^"
     "@types/express": "npm:^4.17.21"
-    express: "npm:^4.22.0"
-    uuid: "npm:^11.0.0"
-    ws: "npm:^8.18.0"
   languageName: unknown
   linkType: soft
 
@@ -7677,7 +7650,6 @@ __metadata:
     lodash: "npm:^4.17.21"
     react: "npm:^18.0.2"
     react-dom: "npm:^18.0.2"
-    react-helmet: "npm:6.1.0"
     react-router-dom: "npm:^6.30.2"
     react-use: "npm:^17.2.4"
   peerDependencies:
@@ -7765,7 +7737,6 @@ __metadata:
     "@backstage/types": "workspace:^"
     "@types/express": "npm:^4.17.6"
     "@types/supertest": "npm:^2.0.8"
-    already: "npm:^2.2.1"
     express: "npm:^4.22.0"
     express-promise-router: "npm:^4.1.0"
     knex: "npm:^3.0.0"
@@ -18737,7 +18708,6 @@ __metadata:
     commander: "npm:^14.0.3"
     find-process: "npm:^2.0.0"
     fs-extra: "npm:^11.0.0"
-    global-agent: "npm:^3.0.0"
     http-proxy: "npm:^1.18.1"
     nodemon: "npm:^3.0.1"
     react-dev-utils: "npm:^12.0.0-next.60"
@@ -22797,13 +22767,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"already@npm:^2.2.1":
-  version: 2.2.1
-  resolution: "already@npm:2.2.1"
-  checksum: 10/1c55b50667c3dbe9d40716454d4a870f5758143061a0e39c0a7077eab2c6dbec116edf081796afb6f441462096bf68ef72a4daad074843a0d970527f29037ffe
-  languageName: node
-  linkType: hard
-
 "anser@npm:^2.1.1":
   version: 2.3.3
   resolution: "anser@npm:2.3.3"