Businesses in Markham, Illinois

As of October 20, 2026, ListRiver's records show 739 active registered businesses in Markham, Illinois. 59% are LLCs. 14 were formed in September 2026.

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

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Businesses on record

739

Formed in the last 12 months

160

Formed in September

With a phone number

60 records

New Markham businesses per month

Businesses on record by formation month, through September 2026. Monthly Illinois new-business reports · Get the list of 14 new businesses formed in September 2026

Entity types

LLCs438 · 59%
Corporations203 · 27%
Nonprofits96 · 13%
Other2 · 0%

Top ZIP codes

ZIP 60428704 · 95%
ZIP 6042626 · 4%
ZIP 604294 · 1%
ZIP 604782 · 0%
ZIP 604381 · 0%
ZIP 606281 · 0%
ZIP 601211 · 0%

Newest business names registered in Markham

Get all 739 Markham businesses · see price Just the 38 formed in the last 90 days · see price

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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	Markham	LLC	Oct 2026
Name hidden	Markham	LLC	Oct 2026
Name hidden	Markham	LLC	Oct 2026
Name hidden	Markham	LLC	Oct 2026
Name hidden	Markham	LLC	Oct 2026
Name hidden	Markham	Nonprofit	Oct 2026
Name hidden	Markham	Nonprofit	Oct 2026
Name hidden	Markham	Corporation	Oct 2026
Name hidden	Markham	Corporation	Oct 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	LLC	Sep 2026
Name hidden	Markham	Corporation	Sep 2026
Name hidden	Markham	LLC	Aug 2026
Name hidden	Markham	LLC	Aug 2026

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Common questions about Markham businesses

How many businesses are registered in Markham, Illinois?

ListRiver has 739 active registered businesses in Markham, 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 Markham, Illinois in September 2026?

14 businesses on record in Markham, Illinois were formed in September 2026.

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

160 businesses on record in Markham, Illinois were formed in the 12 months through September 2026.

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

LLCs are the most common: 438 of 739 businesses on record (59%), followed by Corporations with 203 (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 Markham, Illinois?

Use ListRiver's list builder to filter Markham, 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

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<div style="max-width:520px"><iframe src="https://listriver.com/embed/new-businesses/illinois/markham" title="New businesses in Markham, 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/markham">Businesses in Markham, 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.