diff --git a/README.md b/README.md
index d7b5f62bb..9cebe0257 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,8 @@
 - [Coercion for primitives](#coercion-for-primitives)
 - [Literals](#literals)
 - [Strings](#strings)
+  - [Datetime](#datetime-validation)
+  - [IP](#ip-address-validation)
 - [Numbers](#numbers)
 - [NaNs](#nans)
 - [Booleans](#booleans)
@@ -594,6 +596,7 @@ z.string().startsWith(string);
 z.string().endsWith(string);
 z.string().trim(); // trim whitespace
 z.string().datetime(); // defaults to UTC, see below for options
+z.string().ip(); // defaults to IPv4 and IPv6, see below for options
 ```
 
 > Check out [validator.js](https://github.com/validatorjs/validator.js) for a bunch of other useful string validation functions that can be used in conjunction with [Refinements](#refine).
@@ -619,6 +622,7 @@ z.string().uuid({ message: "Invalid UUID" });
 z.string().startsWith("https://", { message: "Must provide secure URL" });
 z.string().endsWith(".com", { message: "Only .com domains allowed" });
 z.string().datetime({ message: "Invalid datetime string! Must be UTC." });
+z.string().ip({ message: "Invalid IP address" });
 ```
 
 ### Datetime validation
@@ -656,6 +660,31 @@ datetime.parse("2020-01-01T00:00:00Z"); // fail
 datetime.parse("2020-01-01T00:00:00.123456Z"); // fail
 ```
 
+### IP address validation
+
+The `z.string().ip()` method by default validate IPv4 and IPv6.
+
+```ts
+const ip = z.string().ip();
+
+ip.parse("192.168.1.1"); // pass
+ip.parse("84d5:51a0:9114:1855:4cfa:f2d7:1f12:7003"); // pass
+ip.parse("84d5:51a0:9114:1855:4cfa:f2d7:1f12:192.168.1.1"); // pass
+
+ip.parse("256.1.1.1"); // fail
+ip.parse("84d5:51a0:9114:gggg:4cfa:f2d7:1f12:7003"); // fail
+```
+
+You can additionally set the IP `version`.
+
+```ts
+const ipv4 = z.string().ip({ version: "v4" });
+ipv4.parse("84d5:51a0:9114:1855:4cfa:f2d7:1f12:7003"); // fail
+
+const ipv6 = z.string().ip({ version: "v6" });
+ipv6.parse("192.168.1.1"); // fail
+```
+
 ## Numbers
 
 You can customize certain error messages when creating a number schema.
diff --git a/deno/lib/README.md b/deno/lib/README.md
index d7b5f62bb..9cebe0257 100644
--- a/deno/lib/README.md
+++ b/deno/lib/README.md
@@ -55,6 +55,8 @@
 - [Coercion for primitives](#coercion-for-primitives)
 - [Literals](#literals)
 - [Strings](#strings)
+  - [Datetime](#datetime-validation)
+  - [IP](#ip-address-validation)
 - [Numbers](#numbers)
 - [NaNs](#nans)
 - [Booleans](#booleans)
@@ -594,6 +596,7 @@ z.string().startsWith(string);
 z.string().endsWith(string);
 z.string().trim(); // trim whitespace
 z.string().datetime(); // defaults to UTC, see below for options
+z.string().ip(); // defaults to IPv4 and IPv6, see below for options
 ```
 
 > Check out [validator.js](https://github.com/validatorjs/validator.js) for a bunch of other useful string validation functions that can be used in conjunction with [Refinements](#refine).
@@ -619,6 +622,7 @@ z.string().uuid({ message: "Invalid UUID" });
 z.string().startsWith("https://", { message: "Must provide secure URL" });
 z.string().endsWith(".com", { message: "Only .com domains allowed" });
 z.string().datetime({ message: "Invalid datetime string! Must be UTC." });
+z.string().ip({ message: "Invalid IP address" });
 ```
 
 ### Datetime validation
@@ -656,6 +660,31 @@ datetime.parse("2020-01-01T00:00:00Z"); // fail
 datetime.parse("2020-01-01T00:00:00.123456Z"); // fail
 ```
 
+### IP address validation
+
+The `z.string().ip()` method by default validate IPv4 and IPv6.
+
+```ts
+const ip = z.string().ip();
+
+ip.parse("192.168.1.1"); // pass
+ip.parse("84d5:51a0:9114:1855:4cfa:f2d7:1f12:7003"); // pass
+ip.parse("84d5:51a0:9114:1855:4cfa:f2d7:1f12:192.168.1.1"); // pass
+
+ip.parse("256.1.1.1"); // fail
+ip.parse("84d5:51a0:9114:gggg:4cfa:f2d7:1f12:7003"); // fail
+```
+
+You can additionally set the IP `version`.
+
+```ts
+const ipv4 = z.string().ip({ version: "v4" });
+ipv4.parse("84d5:51a0:9114:1855:4cfa:f2d7:1f12:7003"); // fail
+
+const ipv6 = z.string().ip({ version: "v6" });
+ipv6.parse("192.168.1.1"); // fail
+```
+
 ## Numbers
 
 You can customize certain error messages when creating a number schema.
diff --git a/deno/lib/ZodError.ts b/deno/lib/ZodError.ts
index 365cb3cae..dcf4cc18a 100644
--- a/deno/lib/ZodError.ts
+++ b/deno/lib/ZodError.ts
@@ -97,6 +97,7 @@ export type StringValidation =
   | "cuid"
   | "cuid2"
   | "datetime"
+  | "ip"
   | { startsWith: string }
   | { endsWith: string };
 
diff --git a/deno/lib/__tests__/string.test.ts b/deno/lib/__tests__/string.test.ts
index b3996bec8..8c46e48ad 100644
--- a/deno/lib/__tests__/string.test.ts
+++ b/deno/lib/__tests__/string.test.ts
@@ -249,30 +249,42 @@ test("checks getters", () => {
   expect(z.string().email().isCUID).toEqual(false);
   expect(z.string().email().isCUID2).toEqual(false);
   expect(z.string().email().isUUID).toEqual(false);
+  expect(z.string().email().isIP).toEqual(false);
 
   expect(z.string().url().isEmail).toEqual(false);
   expect(z.string().url().isURL).toEqual(true);
   expect(z.string().url().isCUID).toEqual(false);
   expect(z.string().url().isCUID2).toEqual(false);
   expect(z.string().url().isUUID).toEqual(false);
+  expect(z.string().url().isIP).toEqual(false);
 
   expect(z.string().cuid().isEmail).toEqual(false);
   expect(z.string().cuid().isURL).toEqual(false);
   expect(z.string().cuid().isCUID).toEqual(true);
   expect(z.string().cuid().isCUID2).toEqual(false);
   expect(z.string().cuid().isUUID).toEqual(false);
+  expect(z.string().cuid().isIP).toEqual(false);
 
   expect(z.string().cuid2().isEmail).toEqual(false);
   expect(z.string().cuid2().isURL).toEqual(false);
   expect(z.string().cuid2().isCUID).toEqual(false);
   expect(z.string().cuid2().isCUID2).toEqual(true);
   expect(z.string().cuid2().isUUID).toEqual(false);
+  expect(z.string().cuid2().isIP).toEqual(false);
 
   expect(z.string().uuid().isEmail).toEqual(false);
   expect(z.string().uuid().isURL).toEqual(false);
   expect(z.string().uuid().isCUID).toEqual(false);
   expect(z.string().uuid().isCUID2).toEqual(false);
   expect(z.string().uuid().isUUID).toEqual(true);
+  expect(z.string().uuid().isIP).toEqual(false);
+
+  expect(z.string().ip().isEmail).toEqual(false);
+  expect(z.string().ip().isURL).toEqual(false);
+  expect(z.string().ip().isCUID).toEqual(false);
+  expect(z.string().ip().isCUID2).toEqual(false);
+  expect(z.string().ip().isUUID).toEqual(false);
+  expect(z.string().ip().isIP).toEqual(true);
 });
 
 test("min max getters", () => {
@@ -378,3 +390,44 @@ test("datetime parsing", () => {
     datetimeOffset4Ms.parse("2020-10-14T17:42:29.124+00:00")
   ).toThrow();
 });
+
+test("IP validation", () => {
+  const ip = z.string().ip();
+  expect(ip.safeParse("122.122.122.122").success).toBe(true);
+
+  const ipv4 = z.string().ip({ version: "v4" });
+  expect(() => ipv4.parse("6097:adfa:6f0b:220d:db08:5021:6191:7990")).toThrow();
+
+  const ipv6 = z.string().ip({ version: "v6" });
+  expect(() => ipv6.parse("254.164.77.1")).toThrow();
+
+  const validIPs = [
+    "1e5e:e6c8:daac:514b:114b:e360:d8c0:682c",
+    "9d4:c956:420f:5788:4339:9b3b:2418:75c3",
+    "a6ea::2454:a5ce:94.105.123.75",
+    "474f:4c83::4e40:a47:ff95:0cda",
+    "d329:0:25b4:db47:a9d1:0:4926:0000",
+    "e48:10fb:1499:3e28:e4b6:dea5:4692:912c",
+    "114.71.82.94",
+    "0.0.0.0",
+    "37.85.236.115",
+  ];
+
+  const invalidIPs = [
+    "d329:1be4:25b4:db47:a9d1:dc71:4926:992c:14af",
+    "d5e7:7214:2b78::3906:85e6:53cc:709:32ba",
+    "8f69::c757:395e:976e::3441",
+    "54cb::473f:d516:0.255.256.22",
+    "54cb::473f:d516:192.168.1",
+    "256.0.4.4",
+    "-1.0.555.4",
+    "0.0.0.0.0",
+    "1.1.1",
+  ];
+  // no parameters check IPv4 or IPv6
+  const ipSchema = z.string().ip();
+  expect(validIPs.every((ip) => ipSchema.safeParse(ip).success)).toBe(true);
+  expect(
+    invalidIPs.every((ip) => ipSchema.safeParse(ip).success === false)
+  ).toBe(true);
+});
diff --git a/deno/lib/types.ts b/deno/lib/types.ts
index 15f5b0bb2..2c4c5fd8a 100644
--- a/deno/lib/types.ts
+++ b/deno/lib/types.ts
@@ -486,6 +486,7 @@ export abstract class ZodType<
 //////////                     //////////
 /////////////////////////////////////////
 /////////////////////////////////////////
+export type IpVersion = "v4" | "v6";
 export type ZodStringCheck =
   | { kind: "min"; value: number; message?: string }
   | { kind: "max"; value: number; message?: string }
@@ -505,7 +506,8 @@ export type ZodStringCheck =
       offset: boolean;
       precision: number | null;
       message?: string;
-    };
+    }
+  | { kind: "ip"; version?: IpVersion; message?: string };
 
 export interface ZodStringDef extends ZodTypeDef {
   checks: ZodStringCheck[];
@@ -531,6 +533,12 @@ const emailRegex =
 const emojiRegex =
   /(\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff]|\uFE0E|\uFE0F)/;
 
+const ipv4Regex =
+  /^(((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))\.){3}((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))$/;
+
+const ipv6Regex =
+  /^(([a-f0-9]{1,4}:){7}|::([a-f0-9]{1,4}:){0,6}|([a-f0-9]{1,4}:){1}:([a-f0-9]{1,4}:){0,5}|([a-f0-9]{1,4}:){2}:([a-f0-9]{1,4}:){0,4}|([a-f0-9]{1,4}:){3}:([a-f0-9]{1,4}:){0,3}|([a-f0-9]{1,4}:){4}:([a-f0-9]{1,4}:){0,2}|([a-f0-9]{1,4}:){5}:([a-f0-9]{1,4}:){0,1})([a-f0-9]{1,4}|(((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))\.){3}((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2})))$/;
+
 // Adapted from https://stackoverflow.com/a/3143231
 const datetimeRegex = (args: { precision: number | null; offset: boolean }) => {
   if (args.precision) {
@@ -564,6 +572,17 @@ const datetimeRegex = (args: { precision: number | null; offset: boolean }) => {
   }
 };
 
+function isValidIP(ip: string, version?: IpVersion) {
+  if ((version === "v4" || !version) && ipv4Regex.test(ip)) {
+    return true;
+  }
+  if ((version === "v6" || !version) && ipv6Regex.test(ip)) {
+    return true;
+  }
+
+  return false;
+}
+
 export class ZodString extends ZodType<string, ZodStringDef> {
   _parse(input: ParseInput): ParseReturnType<string> {
     if (this._def.coerce) {
@@ -749,6 +768,16 @@ export class ZodString extends ZodType<string, ZodStringDef> {
           });
           status.dirty();
         }
+      } else if (check.kind === "ip") {
+        if (!isValidIP(input.data, check.version)) {
+          ctx = this._getOrReturnCtx(input, ctx);
+          addIssueToContext(ctx, {
+            validation: "ip",
+            code: ZodIssueCode.invalid_string,
+            message: check.message,
+          });
+          status.dirty();
+        }
       } else {
         util.assertNever(check);
       }
@@ -793,6 +822,11 @@ export class ZodString extends ZodType<string, ZodStringDef> {
   cuid2(message?: errorUtil.ErrMessage) {
     return this._addCheck({ kind: "cuid2", ...errorUtil.errToObj(message) });
   }
+
+  ip(options?: string | { version?: "v4" | "v6"; message?: string }) {
+    return this._addCheck({ kind: "ip", ...errorUtil.errToObj(options) });
+  }
+
   datetime(
     options?:
       | string
@@ -902,6 +936,9 @@ export class ZodString extends ZodType<string, ZodStringDef> {
   get isCUID2() {
     return !!this._def.checks.find((ch) => ch.kind === "cuid2");
   }
+  get isIP() {
+    return !!this._def.checks.find((ch) => ch.kind === "ip");
+  }
 
   get minLength() {
     let min: number | null = null;
diff --git a/src/ZodError.ts b/src/ZodError.ts
index 03a34432a..0833ae614 100644
--- a/src/ZodError.ts
+++ b/src/ZodError.ts
@@ -97,6 +97,7 @@ export type StringValidation =
   | "cuid"
   | "cuid2"
   | "datetime"
+  | "ip"
   | { startsWith: string }
   | { endsWith: string };
 
diff --git a/src/__tests__/string.test.ts b/src/__tests__/string.test.ts
index ac3dcd144..141f4ab22 100644
--- a/src/__tests__/string.test.ts
+++ b/src/__tests__/string.test.ts
@@ -248,30 +248,42 @@ test("checks getters", () => {
   expect(z.string().email().isCUID).toEqual(false);
   expect(z.string().email().isCUID2).toEqual(false);
   expect(z.string().email().isUUID).toEqual(false);
+  expect(z.string().email().isIP).toEqual(false);
 
   expect(z.string().url().isEmail).toEqual(false);
   expect(z.string().url().isURL).toEqual(true);
   expect(z.string().url().isCUID).toEqual(false);
   expect(z.string().url().isCUID2).toEqual(false);
   expect(z.string().url().isUUID).toEqual(false);
+  expect(z.string().url().isIP).toEqual(false);
 
   expect(z.string().cuid().isEmail).toEqual(false);
   expect(z.string().cuid().isURL).toEqual(false);
   expect(z.string().cuid().isCUID).toEqual(true);
   expect(z.string().cuid().isCUID2).toEqual(false);
   expect(z.string().cuid().isUUID).toEqual(false);
+  expect(z.string().cuid().isIP).toEqual(false);
 
   expect(z.string().cuid2().isEmail).toEqual(false);
   expect(z.string().cuid2().isURL).toEqual(false);
   expect(z.string().cuid2().isCUID).toEqual(false);
   expect(z.string().cuid2().isCUID2).toEqual(true);
   expect(z.string().cuid2().isUUID).toEqual(false);
+  expect(z.string().cuid2().isIP).toEqual(false);
 
   expect(z.string().uuid().isEmail).toEqual(false);
   expect(z.string().uuid().isURL).toEqual(false);
   expect(z.string().uuid().isCUID).toEqual(false);
   expect(z.string().uuid().isCUID2).toEqual(false);
   expect(z.string().uuid().isUUID).toEqual(true);
+  expect(z.string().uuid().isIP).toEqual(false);
+
+  expect(z.string().ip().isEmail).toEqual(false);
+  expect(z.string().ip().isURL).toEqual(false);
+  expect(z.string().ip().isCUID).toEqual(false);
+  expect(z.string().ip().isCUID2).toEqual(false);
+  expect(z.string().ip().isUUID).toEqual(false);
+  expect(z.string().ip().isIP).toEqual(true);
 });
 
 test("min max getters", () => {
@@ -377,3 +389,44 @@ test("datetime parsing", () => {
     datetimeOffset4Ms.parse("2020-10-14T17:42:29.124+00:00")
   ).toThrow();
 });
+
+test("IP validation", () => {
+  const ip = z.string().ip();
+  expect(ip.safeParse("122.122.122.122").success).toBe(true);
+
+  const ipv4 = z.string().ip({ version: "v4" });
+  expect(() => ipv4.parse("6097:adfa:6f0b:220d:db08:5021:6191:7990")).toThrow();
+
+  const ipv6 = z.string().ip({ version: "v6" });
+  expect(() => ipv6.parse("254.164.77.1")).toThrow();
+
+  const validIPs = [
+    "1e5e:e6c8:daac:514b:114b:e360:d8c0:682c",
+    "9d4:c956:420f:5788:4339:9b3b:2418:75c3",
+    "a6ea::2454:a5ce:94.105.123.75",
+    "474f:4c83::4e40:a47:ff95:0cda",
+    "d329:0:25b4:db47:a9d1:0:4926:0000",
+    "e48:10fb:1499:3e28:e4b6:dea5:4692:912c",
+    "114.71.82.94",
+    "0.0.0.0",
+    "37.85.236.115",
+  ];
+
+  const invalidIPs = [
+    "d329:1be4:25b4:db47:a9d1:dc71:4926:992c:14af",
+    "d5e7:7214:2b78::3906:85e6:53cc:709:32ba",
+    "8f69::c757:395e:976e::3441",
+    "54cb::473f:d516:0.255.256.22",
+    "54cb::473f:d516:192.168.1",
+    "256.0.4.4",
+    "-1.0.555.4",
+    "0.0.0.0.0",
+    "1.1.1",
+  ];
+  // no parameters check IPv4 or IPv6
+  const ipSchema = z.string().ip();
+  expect(validIPs.every((ip) => ipSchema.safeParse(ip).success)).toBe(true);
+  expect(
+    invalidIPs.every((ip) => ipSchema.safeParse(ip).success === false)
+  ).toBe(true);
+});
diff --git a/src/types.ts b/src/types.ts
index 82bd23d21..d03b51a2c 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -486,6 +486,7 @@ export abstract class ZodType<
 //////////                     //////////
 /////////////////////////////////////////
 /////////////////////////////////////////
+export type IpVersion = "v4" | "v6";
 export type ZodStringCheck =
   | { kind: "min"; value: number; message?: string }
   | { kind: "max"; value: number; message?: string }
@@ -505,7 +506,8 @@ export type ZodStringCheck =
       offset: boolean;
       precision: number | null;
       message?: string;
-    };
+    }
+  | { kind: "ip"; version?: IpVersion; message?: string };
 
 export interface ZodStringDef extends ZodTypeDef {
   checks: ZodStringCheck[];
@@ -531,6 +533,12 @@ const emailRegex =
 const emojiRegex =
   /(\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff]|\uFE0E|\uFE0F)/;
 
+const ipv4Regex =
+  /^(((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))\.){3}((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))$/;
+
+const ipv6Regex =
+  /^(([a-f0-9]{1,4}:){7}|::([a-f0-9]{1,4}:){0,6}|([a-f0-9]{1,4}:){1}:([a-f0-9]{1,4}:){0,5}|([a-f0-9]{1,4}:){2}:([a-f0-9]{1,4}:){0,4}|([a-f0-9]{1,4}:){3}:([a-f0-9]{1,4}:){0,3}|([a-f0-9]{1,4}:){4}:([a-f0-9]{1,4}:){0,2}|([a-f0-9]{1,4}:){5}:([a-f0-9]{1,4}:){0,1})([a-f0-9]{1,4}|(((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))\.){3}((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2})))$/;
+
 // Adapted from https://stackoverflow.com/a/3143231
 const datetimeRegex = (args: { precision: number | null; offset: boolean }) => {
   if (args.precision) {
@@ -564,6 +572,17 @@ const datetimeRegex = (args: { precision: number | null; offset: boolean }) => {
   }
 };
 
+function isValidIP(ip: string, version?: IpVersion) {
+  if ((version === "v4" || !version) && ipv4Regex.test(ip)) {
+    return true;
+  }
+  if ((version === "v6" || !version) && ipv6Regex.test(ip)) {
+    return true;
+  }
+
+  return false;
+}
+
 export class ZodString extends ZodType<string, ZodStringDef> {
   _parse(input: ParseInput): ParseReturnType<string> {
     if (this._def.coerce) {
@@ -749,6 +768,16 @@ export class ZodString extends ZodType<string, ZodStringDef> {
           });
           status.dirty();
         }
+      } else if (check.kind === "ip") {
+        if (!isValidIP(input.data, check.version)) {
+          ctx = this._getOrReturnCtx(input, ctx);
+          addIssueToContext(ctx, {
+            validation: "ip",
+            code: ZodIssueCode.invalid_string,
+            message: check.message,
+          });
+          status.dirty();
+        }
       } else {
         util.assertNever(check);
       }
@@ -793,6 +822,11 @@ export class ZodString extends ZodType<string, ZodStringDef> {
   cuid2(message?: errorUtil.ErrMessage) {
     return this._addCheck({ kind: "cuid2", ...errorUtil.errToObj(message) });
   }
+
+  ip(options?: string | { version?: "v4" | "v6"; message?: string }) {
+    return this._addCheck({ kind: "ip", ...errorUtil.errToObj(options) });
+  }
+
   datetime(
     options?:
       | string
@@ -902,6 +936,9 @@ export class ZodString extends ZodType<string, ZodStringDef> {
   get isCUID2() {
     return !!this._def.checks.find((ch) => ch.kind === "cuid2");
   }
+  get isIP() {
+    return !!this._def.checks.find((ch) => ch.kind === "ip");
+  }
 
   get minLength() {
     let min: number | null = null;