diff --git a/ark/type/__tests__/integration/allConfig.ts b/ark/type/__tests__/integration/allConfig.ts
index 2208e49f04..b9ba6e89d7 100644
--- a/ark/type/__tests__/integration/allConfig.ts
+++ b/ark/type/__tests__/integration/allConfig.ts
@@ -107,6 +107,9 @@ configure({
 		"string.hex": {
 			description: "configured"
 		},
+		"string.base58": {
+			description: "configured"
+		},
 		"string.base64.url": {
 			description: "configured"
 		},
diff --git a/ark/type/__tests__/keywords/string.test.ts b/ark/type/__tests__/keywords/string.test.ts
index 06fd5ae464..cf7b21bb72 100644
--- a/ark/type/__tests__/keywords/string.test.ts
+++ b/ark/type/__tests__/keywords/string.test.ts
@@ -34,6 +34,19 @@ contextualize(() => {
 		)
 	})
 
+	it("base58", () => {
+		const Base58 = type("string.base58")
+		attest(Base58("5HueCGU8rMjxEXxiPuD5BDku4MkFqeZyd4dZ1jvhTVqvbTLvyTJ")).snap(
+			"5HueCGU8rMjxEXxiPuD5BDku4MkFqeZyd4dZ1jvhTVqvbTLvyTJ"
+		)
+		attest(Base58("abc123")).snap("abc123")
+		attest(Base58("0").toString()).snap('must be base58-encoded (was "0")')
+		attest(Base58("O").toString()).snap('must be base58-encoded (was "O")')
+		attest(Base58("I").toString()).snap('must be base58-encoded (was "I")')
+		attest(Base58("l").toString()).snap('must be base58-encoded (was "l")')
+		attest(Base58("").toString()).snap('must be base58-encoded (was "")')
+	})
+
 	it("base64", () => {
 		const B64 = type("string.base64")
 		attest(B64("fn5+")).snap("fn5+")
diff --git a/ark/type/keywords/string.ts b/ark/type/keywords/string.ts
index 05064933b5..ab00af8d91 100644
--- a/ark/type/keywords/string.ts
+++ b/ark/type/keywords/string.ts
@@ -80,6 +80,8 @@ export declare namespace stringInteger {
 
 const hex = regexStringNode(/^[\dA-Fa-f]+$/, "hex characters only")
 
+const base58 = regexStringNode(/^[1-9A-HJ-NP-Za-km-z]+$/, "base58-encoded")
+
 const base64 = Scope.module(
 	{
 		root: regexStringNode(
@@ -911,6 +913,7 @@ export const string = Scope.module(
 			"only letters and digits 0-9"
 		),
 		hex,
+		base58,
 		base64,
 		capitalize,
 		creditCard,
@@ -945,6 +948,7 @@ export declare namespace string {
 		alpha: string
 		alphanumeric: string
 		hex: string
+		base58: string
 		base64: base64.submodule
 		capitalize: capitalize.submodule
 		creditCard: string