SEO Agencies in Illinois

175 SEO agencies are listed in Illinois. 6 have been assessed on the Agency List Score as of September 2026; the highest-ranked is Webtage at 95.6.

Ranked · 4 of 6 assessed

Ordered by Agency List Score
#1 of 6 assessed
Webtage
96
Verified

Digital marketing and web design for healthcare, B2B, and nonprofits

Ads ManagementContent MarketingLead Generation
#2 of 6 assessed
Simple SEO Group
78
Verified

SEO, web design, and PPC ads for SMBs and Fortune 1000

Ads ManagementEmail MarketingLead Generation
#3 of 6 assessed
Cyberdias
72
Verified

SEO and search services for inbound lead capture and search visibility

Search Engine OptimizationWebsite Optimization
#4 of 6 assessed
Alakmalak
53
Verified

Website design, ecommerce builds, and mobile apps for businesses across India

Conversion Rate OptimizationSearch Engine OptimizationSocial Media Management (SMM)

Also in Illinois · 171 not ranked here

169 have not yet been assessed on the Agency List Score. Alphabetical.
1Brand DesignView profile →1ON1 SEO TrainingView profile →2 Guys DesignView profile →222digital MarketingView profile →309 MarketingView profile →A Brand StrategyView profile →AbelsonTaylorView profile →AdeptPlusView profile →Admark DigitalView profile →Adventive MarketingView profile →Agencyh5View profile →AIM Dental MarketingView profile →AmsiveView profile →AndrewziolaView profile →Angle180View profile →Anri StudioView profile →AppsomaticView profile →ArcaleaView profile →Aronson AdvertisingView profile →atCommunicationsView profile →Barcelona Creative GroupView profile →BeingSeen360View profile →Black Raven MediaView profile →Blue Magnet InteractiveView profile →
25 more listed here are not shown on this page.

About this ranking

What this page ranks

This page ranks 4 of the 6 assessed SEO agencies in Illinois — the ones carrying a published score — out of 175 listed.

The score measures how well an agency documents its own work in public — named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than described as the client's own results. It does not measure client satisfaction, price, or availability.

Cohorts and awards

Agencies are compared within a cohort — here, SEO in Illinois. A cohort must be large enough to express the band being awarded: at least 8 assessed agencies for a top 25% award, 20 for top 10%, 40 for top 5%, and 300 for top 1%. This one holds 6, so no award can be issued here.

The 169 SEO agencies not yet assessed are listed on this page but not ranked.

A further 2 were assessed and no published evidence of their work was found, so no score is shown for them.

Read the full methodology

Paid placement

Partner agencies can buy a labelled placement block above the ranking on this page. It is always marked as paid and is never mixed into the ranked list.

Placement is paid; it does not affect the ranking, cohort membership, or any agency's score. Ranking position, cohort membership and the score itself are not for sale.

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Questions

How many SEO agencies are in Illinois?
175 are listed on Agency List in Illinois. 6 of them have been assessed on the Agency List Score as of September 2026, and 4 of those carry a published score.
Which SEO agency in Illinois is ranked highest?
Webtage, with an Agency List Score of 95.6, ranks #1 of 6 assessed agencies in SEO in Illinois.
Why are 171 SEO agencies listed here but not ranked?
169 of the 175 listed have not yet been assessed on the Agency List Score. A further 2 were assessed and no published evidence of their work was found, so no score is shown for them. They each have a profile and are listed below the ranking, alphabetically, rather than being hidden or mixed into it.
How is the ranking determined?
By Agency List Score, within the SEO in Illinois cohort of 6 assessed agencies. The score is computed from evidence published on each agency's own website: named clients, quantified outcomes, and whether the outcome is attributed to the agency. Paid placement does not affect it.