Businesses in Diamond, Illinois

As of October 20, 2026, ListRiver's records show 66 active registered businesses in Diamond, Illinois. 73% are LLCs. 2 were formed in September 2026.

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

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Businesses on record

Formed in the last 12 months

Formed in September

With a phone number

27%

18 records

New Diamond businesses per month

Businesses on record by formation month, through September 2026. Monthly Illinois new-business reports · Get the list of 2 new businesses formed in September 2026

Entity types

LLCs48 · 73%
Corporations13 · 20%
Nonprofits5 · 8%

Newest business names registered in Diamond

Get all 66 Diamond businesses · see price Just the 6 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	Diamond	LLC	Oct 2026
Name hidden	Diamond	LLC	Oct 2026
Name hidden	Diamond	LLC	Sep 2026
Name hidden	Diamond	LLC	Sep 2026
Name hidden	Diamond	LLC	Aug 2026
Name hidden	Diamond	LLC	Aug 2026
Name hidden	Diamond	LLC	Jul 2026
Name hidden	Diamond	LLC	May 2026
Name hidden	Diamond	LLC	Apr 2026
Name hidden	Diamond	LLC	Feb 2026
Name hidden	Diamond	LLC	Jan 2026
Name hidden	Diamond	LLC	Jan 2026
Name hidden	Diamond	LLC	Dec 2025
Name hidden	Diamond	LLC	Dec 2025
Name hidden	Diamond	LLC	Nov 2025
Name hidden	Diamond	LLC	Jul 2025
Name hidden	Diamond	LLC	Jul 2025
Name hidden	Diamond	Corporation	Jul 2025
Name hidden	Diamond	LLC	Jun 2025
Name hidden	Diamond	LLC	May 2025
Name hidden	Diamond	LLC	Apr 2025
Name hidden	Diamond	LLC	Apr 2025
Name hidden	Diamond	LLC	Dec 2024
Name hidden	Diamond	LLC	Dec 2024
Name hidden	Diamond	LLC	Nov 2024

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Common questions about Diamond businesses

How many businesses are registered in Diamond, Illinois?

ListRiver has 66 active registered businesses in Diamond, 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 Diamond, Illinois in September 2026?

2 businesses on record in Diamond, Illinois were formed in September 2026.

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

13 businesses on record in Diamond, Illinois were formed in the 12 months through September 2026.

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

LLCs are the most common: 48 of 66 businesses on record (73%), followed by Corporations with 13 (20%).

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 Diamond, Illinois?

Use ListRiver's list builder to filter Diamond, 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.

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