The Grimes Brief

Reference · ZIP code

The Grimes, Iowa ZIP code, county, and the quick facts people look up.

A short reference page for the details people look up first about Grimes, Iowa: the ZIP code, the county, and the basics that go on a form.

The quick answer

The Grimes, Iowa ZIP code is 50111. Grimes is a Des Moines suburb split between Polk County and Dallas County, with most of the city in Polk and the west side in Dallas.

The basics

Grimes at a glance

ZIP code50111
CountiesPolk + Dallas
Area code515
School districtDallas Center-Grimes
Time zoneCentral

Because Grimes straddles a county line, a couple of things depend on which side of town you live on, chiefly your county for voting, vehicle registration, and property tax. Our voter guide and cost of living pages cover the Polk versus Dallas split in detail.

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Sources: USPS ZIP code lookup; U.S. Census Bureau. Preview build, September 2026.