Company lists · Data refreshed September 2026
Top 25 Fraternities based in the United States
RevenueBase identified 930 fraternities headquartered in the United States as of September 2026 and tracks 49,983 professional contacts across them, including 1,210 with verified work emails. Indianapolis is the largest hub.
This list covers fraternities headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest fraternities based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,264 contacts → | ||||
Indirect evidence “Pi Beta Phi has worked to support and empower our sisters since 1867.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,814 contacts → | ||||
Indirect evidence “In 1904, Alpha Kappa Psi was founded on the principles of educating its members and the public to appreciate and demand higher ideals in business and to further the individual…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,578 contacts → | ||||
Indirect evidence “Delta Sigma Pi is the nation's largest and first co-ed, professional business fraternity that encourages personal and professional development of men and women pursuing careers in…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 2,274 contacts → | ||||
Indirect evidence “Kappa Alpha Theta Fraternity is a company based out of 5720 Montezuma Rd, San Diego, California, United States.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,560 contacts → | ||||
Indirect evidence “Sigma Chi (Σχ) was founded on June 28, 1855, at Miami University in Oxford, Ohio.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,532 contacts → | ||||
Indirect evidence “Pi Kappa Alpha was founded in Room 47 West Range at the University of Virginia in 1868.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,396 contacts → | ||||
Indirect evidence “Since its founding at the University of Virginia on December 10, 1869, Kappa Sigma has initiated more than men on college campuses throughout the United States and Canada.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 1,284 contacts → | ||||
Indirect evidence “The Fraternity's mission is advancing the highest standards of friendship, scholarship, leadership and service for our members throughout life.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1,176 contacts → | ||||
Indirect evidence “OUR MISSION Phi Delta Theta was built on three pillars that haven’t budged an inch since the Fraternity was founded by “The Immortal Six” way back in 1848 at Miami University.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 1,161 contacts → | ||||
Indirect evidence “Pi Kappa Phi is a collegiate men's organization focused on providing a solid experience in key areas of male development including social interaction, scholarship, leadership and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1,101 contacts → | ||||
Indirect evidence “SigEp is redefining fraternity on college campuses across the country.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 1,024 contacts → | ||||
Indirect evidence “The Fraternity of Phi Gamma Delta, also known as Phi Gam or Fiji, was founded May 1, 1848 at Jefferson College (now Washington & Jefferson College).” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,007 contacts → | ||||
Strong evidence “Theta Chi is one of the oldest men’s college fraternities in North America.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 951 contacts → | ||||
Indirect evidence “Sigma Nu (ΣΝ) is a college fraternity that was founded by James Frank Hopkins, Greenfield Quarles and James McIlvaine Riley at the Virginia Military Institute in Lexington…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 921 contacts → | ||||
Indirect evidence “Founded in 1858 at Bethany College in what is now northern West Virginia Delta Tau Delta is a values-based organization with Truth, Courage, Faith and Power as her core values.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 889 contacts → | ||||
Indirect evidence “Alpha Phi Omega is the single most represented co-educational intercollegiate service organization in the United States.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 874 contacts → | ||||
Strong evidence “Lambda Chi Alpha Fraternity is one of the largest men’s general fraternities in North America with more than initiated members and has held chapters at more than 300 universities.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 869 contacts → | ||||
Indirect evidence “Beta Theta Pi is dedicated to developing men of principle for a principled life.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 867 contacts → | ||||
Indirect evidence “Alpha Epsilon Pi is the International Jewish fraternity, with more than 150 chapters and colonies across the United States, Canada, and Israel.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 822 contacts → | ||||
Indirect evidence “Phi Kappa Psi Fraternity is a values based men's social organization.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 792 contacts → | ||||
Indirect evidence “Alpha Tau Omega began as an idea in the mind of a young Civil War veteran who wanted peace and reconciliation.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 781 contacts → | ||||
Indirect evidence “Alpha Sigma Phi Fraternity is equally owned and operated by its initiated brothers.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 694 contacts → | ||||
Indirect evidence “Alpha Phi Alpha Fraternity is a 501(c)7 non-profit organization.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 608 contacts → | ||||
Indirect evidence “Delta Chi (ΔΧ) is an international Greek letter college social fraternity formed on October 13, 1890, at Cornell University, initially as a professional fraternity for law…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 524 contacts → | ||||
Indirect evidence “Sigma Pi Fraternity was founded in 1897 at Vincennes University, in Vincennes, Indiana.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: fraternities. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names fraternities.
- Partial evidence
- Its own public description names part of fraternities, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name fraternities. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 930 fraternities based in the United States
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Fraternities based in the United States at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 930 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among fraternities, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “fraternities”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names fraternities), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among fraternities, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 1,210 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names fraternities, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many fraternities are there based in the United States?
RevenueBase identified 930 fraternities headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
PI Beta PHI Fraternity For Women, headquartered in Town And Country, tops this list with the largest team on record.
Which city has the most fraternities?
Indianapolis leads with 22 headquartered companies, followed by Columbia (16) and Oxford (16).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,210 verified decision-maker contacts tracked across these 930 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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