h3>
<p>For any valid Census dataset, you can view all available Census
regions by calling <code>list_census_regions(dataset)</code>. This will
retrieve the <code>region</code> code, the <code>name</code>, and the
<code>level</code> code indicating the type of geography. Other
information includes population, municipal status, as well as parent
geographic ids for lower levels. All CMAs are included with their own
defined geography, as well as those CAs which have their own Census
tracts.</p>
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