diff --git a/types/treeify/index.d.ts b/types/treeify/index.d.ts
new file mode 100644
index 0000000000..29375cf7ba
--- /dev/null
+++ b/types/treeify/index.d.ts
@@ -0,0 +1,28 @@
+// Type definitions for tress 1.0
+// Project: https://github.com/notatestuser/treeify
+// Definitions by: Mike North <https://github.com/mike-north>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.1
+
+export interface TreeObject {
+    [k: string]: TreeValue;
+}
+export type TreeValue = string | TreeObject;
+
+export function asTree(
+    treeObj: TreeObject,
+    showValues: boolean,
+    hideFunctions: boolean
+): string;
+
+export function asLines(
+    treeObj: TreeObject,
+    showValues: boolean,
+    lineCallback: (line: string) => void
+): string;
+export function asLines(
+    treeObj: TreeObject,
+    showValues: boolean,
+    hideFunctions: boolean,
+    lineCallback: (line: string) => void
+): string;
diff --git a/types/treeify/treeify-tests.ts b/types/treeify/treeify-tests.ts
new file mode 100644
index 0000000000..b8132ec0cf
--- /dev/null
+++ b/types/treeify/treeify-tests.ts
@@ -0,0 +1,35 @@
+import * as treeify from 'treeify';
+
+function log(s: string): void {}
+
+treeify.asTree(
+    {
+        apples: 'gala', //      ├─ apples: gala
+        oranges: 'mandarin' //  └─ oranges: mandarin
+    },
+    true,
+    true
+);
+
+treeify.asLines(
+    {
+        apples: 'gala', //                       ├─ apples: gala
+        oranges: 'mandarin', //                  ├─ oranges: mandarin
+        grapes: {  //                            └─ grapes
+            seedless: 'Thompson, Selma Pete', //     ├─ seedless: Thompson, Selma Pete
+            seeded: 'concord' //                     └─ seeded: Concord
+        }
+    },
+    true,
+    log
+);
+
+treeify.asLines(
+    {
+        apples: 'gala', //      ├─ apples: gala
+        oranges: 'mandarin' //  └─ oranges: mandarin
+    },
+    true,
+    false,
+    log
+);
diff --git a/types/treeify/tsconfig.json b/types/treeify/tsconfig.json
new file mode 100644
index 0000000000..965d33c826
--- /dev/null
+++ b/types/treeify/tsconfig.json
@@ -0,0 +1,16 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": ["es6"],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "forceConsistentCasingInFileNames": true,
+        "noEmit": true,
+        "baseUrl": "../",
+        "typeRoots": ["../"],
+        "types": []
+    },
+    "files": ["index.d.ts", "treeify-tests.ts"]
+}
diff --git a/types/treeify/tslint.json b/types/treeify/tslint.json
new file mode 100644
index 0000000000..10d875b8db
--- /dev/null
+++ b/types/treeify/tslint.json
@@ -0,0 +1,4 @@
+{
+    "extends": "dtslint/dt.json",
+    "rules": {}
+}