GA4 account ID, property ID and measurement ID: where to find each, and which one your agency needs

To give an agency access to Google Analytics 4 you need no ID: an Administrator adds the agency person's Google Account email under Admin > Access Management and picks a role. The IDs are for other jobs. The property ID is a number in the property's settings, the measurement ID starts with G- and sits under Admin > Data streams in your web stream, and the account ID belongs to the account that holds your properties.

This page is for clients and agency staff who were asked for "the GA ID" and are not sure which one is meant.

Which ID is which

Google Analytics is built in layers: an account holds one or more properties, and a property collects data through data streams, one per website or app. Each layer has its own ID:

• Account ID: identifies the Analytics account. Google asks for it, for example, when nobody has administrative access any more and you have to prove ownership.
• Property ID: a number that identifies one GA4 property. Google's Data API, and reporting tools built on it, ask for it.
• Measurement ID: starts with G- and identifies one web data stream. Google says it is the same ID as the destination ID.
• Google tag ID: what Tag Manager and many website builders ask for to install GA4. Google's steps for finding it have you copy the measurement ID from the web stream, so for a GA4 website the two are the same string.
• Stream ID: the ID of each data stream. Google says you can add it to events to send data to a particular stream.

An old ID starting with UA- belonged to Universal Analytics, which GA4 has replaced.

Find the property ID

1. In Google Analytics, click Admin.
2. Under Property, click Property details.
3. Look for the numeric property ID. Google's developer page shows it as "PROPERTY ID", and calls the page Property Settings.

A shortcut from Google's search box article: type Property into the search box at the top of Analytics, and it opens the details of the property you are in. Typing a property ID or name you know takes you to that property.

Find the account ID

Google's help sends you to Admin > under Account > Account details for an account's settings, and says that typing Account, or the account ID, into the Analytics search box opens the same settings. Look there for the account ID. Google's articles don't say on which line of that page it appears.

Before you go looking, check the job in the list further down: it may need another ID, or none.

Find the measurement ID

Google's measurement ID article gives these steps:

1. In Admin, under Data collection and modification, click Data streams.
2. Select the Web tab.
3. Click the web data stream.
4. The measurement ID is in the first row of the stream details.

Google's Google tag ID article puts Data streams under Property Settings instead; the link itself is called Data streams in both. If you see "Choose a platform" and no streams, the property has no data stream yet.

The shortcut: type Tracking, or a measurement ID, into the Analytics search box to open the stream's details.

You need the Editor role or above on the property to see this page. An agency with Viewer access cannot look up the measurement ID itself.

Find the stream ID

In Admin, under Data collection and modification, click Data Streams, select the stream and read the Stream ID field. The same Editor rule applies.

What your agency actually needs

By job:

• Access to GA4: no ID. Send the agency person's Google Account email and agree the role. See how to give an agency access to GA4.
• Installing GA4 on a website with Tag Manager or a website builder: the Google tag ID, which for a GA4 website is the measurement ID starting with G-.
• A reporting tool or Google's Data API: the numeric property ID.
• Linking GA4 to Google Ads: no GA4 ID. Someone with Editor access on the property picks the Google Ads account from a list, or enters the Google Ads customer ID to send a request. See how to find the Google Ads customer ID.
• Moving a property to another Analytics account: the steps are in moving a Google Analytics property.
• Recovering an account nobody can administer: Google asks for the account ID, or the measurement ID of every property, in a file or tag on your website, and then a form.

Sharing an ID is not giving access

Google's steps give someone access to Analytics in one way: an Administrator adds their email address with a role under Access Management. No ID is entered there, so sending an agency an ID does not add it to your account. Share the ID the job needs, and decide who gets in on the user list. The access checklist lists what an agency needs from you across Google and Meta.