Businesses in Mason City, Illinois

As of October 20, 2026, ListRiver's records show 102 active registered businesses in Mason City, Illinois. 54% are LLCs. 1 were formed in September 2026.

From official Illinois registry records, updated weekly. Most Mason City businesses are in Mason County. Look up a Illinois business by name.

Get the Mason City businesses list

One-time list

All 102 businesses in Mason City

$25.00

$25 minimum order. A CSV with every column, plus 6 monthly refreshes.

Buy this list: $25.00 or narrow it down in the list builder

Businesses on record

102

Formed in the last 12 months

Formed in September

With a phone number

11%

11 records

New Mason City businesses per month

Businesses on record by formation month, through September 2026. Monthly Illinois new-business reports · Get the list of 1 new businesses formed in September 2026

Entity types

LLCs55 · 54%
Corporations28 · 27%
Nonprofits19 · 19%

Top ZIP codes

ZIP 62664101 · 99%
ZIP 626441 · 1%

Newest business names registered in Mason City

Get all 102 Mason City businesses · see price Just the 5 formed in the last 90 days · see price

Opens the list builder with Mason City already selected, so you see the exact count and price before you buy. Your list includes addresses, counties, registered agents and more.

See the business names

Enter your email and we'll send you a 6-digit code. Confirm it to see the newest businesses registered in Mason City, and on every ListRiver business-list page for 30 days. Free, no account needed.

We may send you occasional emails about ListRiver business data; unsubscribe any time. Privacy · Members: sign in

This is a small sample, not the full list. To keep automated scrapers from copying our data, we only show a handful of records on public pages. Your downloaded list includes every matching business.

Business	City	Type	Formed
Name hidden	Mason City	LLC	Oct 2026
Name hidden	Mason City	LLC	Oct 2026
Name hidden	Mason City	LLC	Sep 2026
Name hidden	Mason City	LLC	Aug 2026
Name hidden	Mason City	LLC	Aug 2026
Name hidden	Mason City	LLC	Jul 2026
Name hidden	Mason City	LLC	Jul 2026
Name hidden	Mason City	LLC	Jun 2026
Name hidden	Mason City	LLC	Jun 2026
Name hidden	Mason City	LLC	Jun 2026
Name hidden	Mason City	LLC	Jun 2026
Name hidden	Mason City	LLC	May 2026
Name hidden	Mason City	Nonprofit	Apr 2026
Name hidden	Mason City	LLC	Mar 2026
Name hidden	Mason City	LLC	Feb 2026
Name hidden	Mason City	LLC	Feb 2026
Name hidden	Mason City	LLC	Jan 2026
Name hidden	Mason City	LLC	Jan 2026
Name hidden	Mason City	LLC	Jan 2026
Name hidden	Mason City	LLC	Nov 2025
Name hidden	Mason City	LLC	Oct 2025
Name hidden	Mason City	Corporation	Aug 2025
Name hidden	Mason City	LLC	May 2025
Name hidden	Mason City	Nonprofit	Apr 2025
Name hidden	Mason City	LLC	Mar 2025

Build your Mason City business list

See the exact count and price as you filter by county, city, ZIP, entity type and formation date. Download a CSV right away and get monthly refreshes. U.S.-based businesses can pay 20% today and the rest over 6 months with Pay-in-6™, building business credit as they pay.

Build this list

Own a business in Mason City?

Before a lender reads your application, its verification system checks your state filing, your exact legal name and your domain against each other. When they don't agree, you're declined and never told why.

Run the same checks free with our affiliated company, Peak Discounters. No account, no card, under a minute.

Run the free lender check

Common questions about Mason City businesses

How many businesses are registered in Mason City, Illinois?

ListRiver has 102 active registered businesses in Mason City, Illinois on record as of October 20, 2026, from official Illinois business registry data. Dissolved and defunct businesses are not counted.

How many new businesses were formed in Mason City, Illinois in September 2026?

1 businesses on record in Mason City, Illinois were formed in September 2026.

How many new businesses opened in Mason City, Illinois in the last 12 months?

19 businesses on record in Mason City, Illinois were formed in the 12 months through September 2026.

What is the most common type of business in Mason City, Illinois?

LLCs are the most common: 55 of 102 businesses on record (54%), followed by Corporations with 28 (27%).

Where does this data come from?

From Illinois'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 Mason City, Illinois?

Use ListRiver's list builder to filter Mason City, Illinois 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.

More Illinois business lists

Cook County Dupage County Lake County Will County Kane County Sangamon County Mchenry County Winnebago County Madison County St. Clair County Champaign County Peoria County Mclean County Kendall County Rock Island County Tazewell County Dekalb County Kankakee County Lasalle County Macon County Adams County Williamson County Grundy County Vermilion County Effingham County Jackson County Boone County Monroe County Whiteside County Ogle County Macoupin County Coles County Stephenson County Henry County Clinton County Woodford County Lee County Marion County Knox County Jefferson County Jo Daviess County Livingston County Bureau County Morgan County Fayette County Randolph County Douglas County Franklin County Christian County Montgomery County Iroquois County Fulton County Logan County Saline County Mcdonough County Piatt County Shelby County Jersey County White County Richland County Hancock County Bond County Union County Pike County Crawford County Washington County Edgar County Clark County Carroll County Wayne County Warren County Moultrie County De Witt County Ford County Perry County Clay County Mercer County Greene County Menard County Wabash County Chicago Springfield Naperville Schaumburg Northbrook Aurora Des Plaines Skokie Rockford Arlington Heights Elgin Orland Park Plainfield Evanston Glenview Joliet Peoria Palatine Downers Grove Park Ridge Bartelso Westville Nokomis Dixmoor Waterman Nauvoo Shabbona Moro Lakewood Round Lake Heights Thomasboro Wayne City Sherrard Cissna Park Downs Bushnell Ringwood Dahlgren Congerville Bristol Towanda Mettawa Abingdon Shipman Mendon Cairo Saint Elmo Homer Pembroke Township Toulon Taylor Ridge Port Barrington Hometown Murrayville Chebanse Greenup Mccook Clifton Sesser Woodlawn

Put this chart on your website

Free to use on any site, and it updates itself every month. Copy this code and paste it into your page. Preview the chart.

<div style="max-width:520px"><iframe src="https://listriver.com/embed/new-businesses/illinois/mason-city" title="New businesses in Mason City, Illinois by month" width="100%" height="370" style="border:0" loading="lazy"></iframe><p style="font:13px sans-serif;margin:4px 0 0">Source: <a href="https://listriver.com/business-lists/illinois/mason-city">Businesses in Mason City, Illinois</a>, ListRiver</p></div>

About this data

Counts come from official Illinois business registry records on file with ListRiver, current as of October 20, 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.