Boulder, IL ZIP codes

1 ZIP code that list Boulder as a USPS primary or acceptable city. Not a Census place.

Population of associated ZIP codes

6,521

Sum of ZCTA populations for ZIP codes intersecting Boulder. Not a Census place total. Methodology

Combined population of ZIP/ZCTAs that list this USPS city as a primary or acceptable name. This is a labeled ZIP-sum, never a Census place ACS population. Methodology

Map of Boulder, IL

Associated Census ZCTAs for USPS city Boulder, IL — Associated ZIP Code Tabulation Areas for Boulder, IL (USPS city, not a Census place). Boundaries: U.S. Census Bureau. Methodology · Data sources

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ZIP codes associated with Boulder

ZIP	City	County	Population	Income
62231	Carlyle	Clinton County	6,521	$80,660