Businesses in Madison County, Iowa

As of October 12, 2026, ListRiver's records show 1,724 active registered businesses in Madison County, Iowa, the 35th most among Iowa counties. 75% are LLCs. 17 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
1,724
Formed in the last 12 months
251
Formed in September
17
With a phone number
10%
177 records

New Madison County businesses per month

01530Oct 2024: 11Oct 24Nov 2024: 8Dec 2024: 6Jan 2025: 182025Feb 2025: 14Mar 2025: 6Apr 2025: 19May 2025: 12Jun 2025: 7Jul 2025: 17Aug 2025: 15Sep 2025: 11Oct 2025: 24Nov 2025: 13Dec 2025: 13Jan 2026: 252026Feb 2026: 30Mar 2026: 21Apr 2026: 27May 2026: 22Jun 2026: 18Jul 2026: 20Aug 2026: 21Sep 2026: 17

Businesses on record by formation month, through September 2026. Monthly Iowa new-business reports · Get the list of 17 new businesses formed in September 2026

Entity types

  • LLCs1,289 · 75%
  • Nonprofits217 · 13%
  • Corporations209 · 12%
  • LLPs5 · 0%
  • Other2 · 0%
  • Limited partnerships2 · 0%

Top cities

Top ZIP codes

Newest business names registered in Madison County

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BusinessCityTypeFormed
Name hiddenWintersetLLCOct 2026
Name hiddenSaint CharlesLLCSep 2026
Name hiddenWintersetLLCSep 2026
Name hiddenEarlhamLLCSep 2026
Name hiddenSaint CharlesLLCSep 2026
Name hiddenWintersetLLCSep 2026
Name hiddenSaint CharlesLLCSep 2026
Name hiddenEarlhamLLCSep 2026
Name hiddenSaint CharlesLLCSep 2026
Name hiddenSaint CharlesLLCSep 2026
Name hiddenWintersetLLCSep 2026
Name hiddenWintersetLLCSep 2026
Name hiddenWintersetLLCSep 2026
Name hiddenWintersetLLCSep 2026
Name hiddenWintersetLLCSep 2026
Name hiddenEarlhamLLCSep 2026
Name hiddenEarlhamLLCSep 2026
Name hiddenEarlhamLLCSep 2026
Name hiddenWintersetLLCAug 2026
Name hiddenWintersetLLCAug 2026
Name hiddenWintersetLLCAug 2026
Name hiddenSaint CharlesLLCAug 2026
Name hiddenSaint CharlesLLCAug 2026
Name hiddenEarlhamLLCAug 2026
Name hiddenWintersetLLCAug 2026

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Common questions about Madison County businesses

How many businesses are registered in Madison County, Iowa?

ListRiver has 1,724 active registered businesses in Madison 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 Madison County, Iowa in September 2026?

17 businesses on record in Madison County, Iowa were formed in September 2026.

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

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

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

LLCs are the most common: 1,289 of 1,724 businesses on record (75%), followed by Nonprofits with 217 (13%).

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 Madison County, Iowa?

Use ListRiver's list builder to filter Madison 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.