diff --git a/lerna.json b/lerna.json
index 72425889..66d15516 100644
--- a/lerna.json
+++ b/lerna.json
@@ -7,8 +7,9 @@
     "src/interfaces",
     "src/mixins",
     "src/modules/*",
+    "src/services",
     "src/types",
-    "src/services"
+    "src/validators"
   ],
   "command": {
     "publish": {
diff --git a/src/validators/index.ts b/src/validators/index.ts
new file mode 100644
index 00000000..cdcdae5d
--- /dev/null
+++ b/src/validators/index.ts
@@ -0,0 +1 @@
+export * from './validate-postal-code'
diff --git a/src/validators/package.json b/src/validators/package.json
new file mode 100644
index 00000000..e982e8c5
--- /dev/null
+++ b/src/validators/package.json
@@ -0,0 +1,12 @@
+{
+  "name": "@bcrs-shared-components/validators",
+  "version": "0.0.0",
+  "publishConfig": {
+    "access": "public"
+  },
+  "dependencies": {
+  },
+  "devDependencies": {
+  },
+  "gitHead": "31c1b1c7fa82101f90ccd7842e436608bdfca752"
+}
diff --git a/src/validators/validate-postal-code.ts b/src/validators/validate-postal-code.ts
new file mode 100644
index 00000000..347a5754
--- /dev/null
+++ b/src/validators/validate-postal-code.ts
@@ -0,0 +1,14 @@
+/**
+ * Canadian postal code regex (eg, accepts A1A 1A1 or A1A1A1).
+ * Ref: https://en.wikipedia.org/wiki/Postal_codes_in_Canada
+ */
+const CanadaPostalCodeRegex = /^[ABCEGHJ-NPRSTVXY][0-9][ABCEGHJ-NPRSTV-Z][ ]?[0-9][ABCEGHJ-NPRSTV-Z][0-9]$/i
+
+/** Custom validator for postal codes. */
+export function validatePostalCode (value: string, parentVm: any): boolean {
+  // if Canada, validate postal code format
+  // empty value is considered valid -- "required" validation is handled separately
+  if (parentVm.addressCountry === 'CA') return !value || CanadaPostalCodeRegex.test(value)
+  // otherwise, no validation
+  return true
+}
diff --git a/tests/unit/validate-postal-code.spec.ts b/tests/unit/validate-postal-code.spec.ts
new file mode 100644
index 00000000..4d964186
--- /dev/null
+++ b/tests/unit/validate-postal-code.spec.ts
@@ -0,0 +1,57 @@
+import Vue from 'vue'
+import { shallowMount } from '@vue/test-utils'
+import { validatePostalCode } from '@/validators'
+
+const Dummy = Vue.component('DummyComponent', { template: '<div />' })
+
+describe('Validate Postal Code', () => {
+  let vm: any
+
+  beforeAll(async () => {
+    // mount the component and wait for everything to stabilize
+    // (this can be any component since we are not really using it)
+    const wrapper = shallowMount(Dummy)
+    vm = wrapper.vm
+    await Vue.nextTick()
+  })
+
+  it.each([
+    '', // empty value is valid
+    'A1A 1A1',
+    'A1A1A1',
+    'a1a 1a1',
+    'a1a1a1'
+  ])('accepts valid postal code "%s" for Canada', (postalCode) => {
+    expect(validatePostalCode(postalCode, { addressCountry: 'CA' })).toBe(true)
+  })
+
+  it.each([
+    '123456',
+    'A1A-1A1',
+    'AA1 1A1',
+    'A11 1A1',
+    'A1 A1A1',
+    'A1A 1AA',
+    'A1A 11A',
+    ' A1A 1A1',
+    'A1A  1A1',
+    'A1A 1A1 ',
+    'D1D 1D1', // D is not allowed in Canadian postal codes
+    'W1W 1W1', // W is not allowed in Canadian postal codes
+    'Z1Z 1Z1' // Z is not allowed in Canadian postal codes
+  ])('rejects invalid postal code "%s" for Canada', (postalCode) => {
+    expect(validatePostalCode(postalCode, { addressCountry: 'CA' })).toBe(false)
+  })
+
+  it.each([
+    '',
+    'invalid',
+    'A1A 1A1',
+    'A1A-1A1',
+    'D1D 1D1',
+    'W1W 1W1',
+    'Z1Z 1Z1'
+  ])('accepts any postal code "%s" for non-Canada', (postalCode) => {
+    expect(validatePostalCode(postalCode, { addressCountry: 'XX' })).toBe(true)
+  })
+})