Hi Todd,
Our country codes passed via the Marketo integration will not be 3 characters, we pass the 2 character ISO-3166-Alpha 2 codes. As for the region codes they should be passed in the 2 character state you require but will not be sent for all states/regions across the world. If you required different values than what Cvent provides we suggest creating a Custom Contact Field which will allow you control of the inputs from the registrant. To get those setup, reach out to your account team if you require ny assistance.
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Carl Robinson
Senior Solutions Specialist
Cvent
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Original Message:
Sent: 01-26-2026 13:21
From: Todd Moritz
Subject: Marketo ISO values for country and state
I need to map ISO-3166 compliant country (3 digit) and state (2 digit) codes to Marketo. I have an open support ticket where they instructed me to use Work country/region code and Work state/province code, but those aren't passing any values. Has anyone had any luck accessing these fields? Documentation says they're available via the Cvent API, but I can't get them to pass via the integration.
I've also tried overwriting the values on form submit using javascript, but since the Home Address module is tied to contact records as a core widget those values are passing from a different source, and not available to capture on submit.
#Integrations
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Todd Moritz
VP, Event Technology
Bishop-McCannUnited States
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