Businesses in Plymouth County, Iowa

As of October 12, 2026, ListRiver's records show 2,802 active registered businesses in Plymouth County, Iowa, the 18th most among Iowa counties. 75% are LLCs. 20 were formed in September 2026. That is 1% of all Iowa businesses on record.

From official Iowa registry records, updated weekly. Look up a Iowa business by name.

Businesses on record
2,802
Formed in the last 12 months
204
Formed in September
20
With a phone number
7%
195 records

New Plymouth County businesses per month

01530Oct 2024: 11Oct 24Nov 2024: 16Dec 2024: 11Jan 2025: 192025Feb 2025: 17Mar 2025: 14Apr 2025: 18May 2025: 8Jun 2025: 10Jul 2025: 13Aug 2025: 13Sep 2025: 17Oct 2025: 17Nov 2025: 6Dec 2025: 16Jan 2026: 212026Feb 2026: 15Mar 2026: 17Apr 2026: 17May 2026: 25Jun 2026: 15Jul 2026: 9Aug 2026: 26Sep 2026: 20

Businesses on record by formation month, through September 2026. Monthly Iowa new-business reports · Get the list of 20 new businesses formed in September 2026

Entity types

  • LLCs2,107 · 75%
  • Corporations465 · 17%
  • Nonprofits194 · 7%
  • LLPs18 · 1%
  • Limited partnerships10 · 0%
  • Other8 · 0%

Top cities

Top ZIP codes

Newest business names registered in Plymouth County

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BusinessCityTypeFormed
Name hiddenAkronLLCOct 2026
Name hiddenLe MarsCorporationSep 2026
Name hiddenLe MarsLLCSep 2026
Name hiddenLe MarsLLCSep 2026
Name hiddenHintonLLCSep 2026
Name hiddenKingsleyLLCSep 2026
Name hiddenLe MarsLLCSep 2026
Name hiddenHintonLLCSep 2026
Name hiddenLe MarsLLCSep 2026
Name hiddenLe MarsLLCSep 2026
Name hiddenKingsleyLLCSep 2026
Name hiddenLe MarsLLCSep 2026
Name hiddenHintonLLCSep 2026
Name hiddenRemsenLLCSep 2026
Name hiddenHintonLLCSep 2026
Name hiddenMerrillLLCSep 2026
Name hiddenLe MarsLLCSep 2026
Name hiddenLe MarsLLCSep 2026
Name hiddenHintonLLCSep 2026
Name hiddenAkronLLCSep 2026
Name hiddenMerrillLLCSep 2026
Name hiddenLe MarsLLCAug 2026
Name hiddenLe MarsLLCAug 2026
Name hiddenLe MarsLLCAug 2026
Name hiddenAkronLLCAug 2026

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Common questions about Plymouth County businesses

How many businesses are registered in Plymouth County, Iowa?

ListRiver has 2,802 active registered businesses in Plymouth County, Iowa on record as of October 12, 2026, from official Iowa business registry data. Dissolved and defunct businesses are not counted.

How many new businesses were formed in Plymouth County, Iowa in September 2026?

20 businesses on record in Plymouth County, Iowa were formed in September 2026.

How many new businesses opened in Plymouth County, Iowa in the last 12 months?

204 businesses on record in Plymouth County, Iowa were formed in the 12 months through September 2026.

What is the most common type of business in Plymouth County, Iowa?

LLCs are the most common: 2,107 of 2,802 businesses on record (75%), followed by Corporations with 465 (17%).

Where does this data come from?

From Iowa's official business registry. ListRiver loads each new state file, standardizes it, removes duplicates and updates its database weekly. Email and industry details are added from SMBCredit.net where available.

How do I get a list of businesses in Plymouth County, Iowa?

Use ListRiver's list builder to filter Plymouth County, Iowa businesses by entity type, formation date, industry and contact details, see the exact count and price, and download a CSV. Every list includes monthly refresh files.

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About this data

Counts come from official Iowa business registry records on file with ListRiver, current as of October 12, 2026. They include businesses that are active on the state register; dissolved and defunct entities are excluded. Contact details are added from SMBCredit.net where available. Formation months reflect the registration date the state reports. See the methodology for sources, update schedules and known limits.