What are the opening hours?

Monday 8:30am - 5pm Tuesday 8:30am - 5pm Wednesday 8:30am - 5pm Thursday 8:30am - 5pm Friday 8:30am - 5pm

Triangle Fraternity

Home
United States
Plainfield, IN
Triangle Fraternity

A national fraternity built for STEM students seeking brotherhood, leadership, and career development.

Founded by 16 Civil Engineering majors at the University of Illinois, Triangle Fraternity has grown to become the nation’s premier fraternity for men majoring in the fields of Engineering, Architecture, and the Sciences. Since Triangle’s founding in 1907, Triangle has grown to establish 38 chapters and colonies across the country while initiating over 26,000 men. Triangle brothers pride themselves on academic success, professional development, and morally rooted brotherhood.

09/05/2026

🔺 Orange County Triangle brothers, join us!

Come out for Tour de Triangle: Orange County on Thursday, October 22, for an evening of food, drinks, and conversation at BJ’s Restaurant & Brewhouse in Irvine.

Whether you’re a longtime Orange County-area alum or new to the area, come reconnect with fellow brothers, hear the latest updates on UCI and UCLA, and enjoy a night of Triangle brotherhood!

📅 October 22 | 6–8 p.m. PDT
📍 BJ’s Restaurant & Brewhouse | Irvine, CA

All Triangle brothers in the area are welcome, regardless of chapter!

👉 Register here: tinyurl.com/OrangeCountyTdT

09/04/2026

🏆 Triangle has been named an Elevation in Practice Impact Award winner by Association of Fraternity/Sorority Advisors! 🔺

We’re proud to see our Peer Mentor Program recognized for its innovative, student-powered approach to chapter support, development, and growth.

Launched as a pilot in Fall 2024, the program pairs high-achieving undergraduate members with chapters nationwide to provide peer-to-peer support in recruitment, communication, marketing, operations, and leadership development.

Together, our staff and student mentors are building a scalable model that strengthens chapters, develops future leaders, and expands our ability to support members nationwide.

We’re proud to see this work recognized and grateful to everyone who has helped make the program a success. 👏

Read more about the award and the Peer Mentor Program: https://afa1976.org/2026-afa-awards/

08/27/2026

🔺 Seattle-area Triangle brothers, this one’s for you!

Join us for Tour de Triangle: Seattle on Thursday, October 15, for an evening of food, drinks, conversation, and the Seahawks game at Big Time Brewery & Alehouse.

Whether you’ve lived in Seattle for years or are new to the area, come reconnect with fellow alumni and meet other Triangle brothers in the area.

📅 October 15 | 6:30–8:30 p.m.
📍 Big Time Brewery & Alehouse

All Triangle brothers in the area are welcome, regardless of chapter!

👉 Register and get the details here: tinyurl.com/SeattleTdT

08/26/2026

We are so back. 🔺

Recruitment season is officially underway, and our chapters are out there doing what they do best—meeting new people, making memories, and showing potential new members what Triangle is all about.

A new semester is here. Let’s make it a good one.

08/20/2026

Back to campus = back to recruitment. 🔺

Heading back to school? Take Triangle with you. Undergraduate brothers: Join President's Men for just $25 and receive a limited-edition Triangle Bluetooth speaker. Bring it to your next chapter event, study session, tailgate, or wherever you’re meeting potential new members.

Your membership also supports scholarships, leadership programs, and chapter success. Plus, you can help your chapter climb the Active Chapter Challenge standings for a chance to win a FREE cookout or pizza party!

Join President’s Men here: https://www.givecampus.com/campaigns/65727/donations/ 🔊

Don't forget to select President’s Men in the designation dropdown.

08/15/2026

Build your legacy. 🔺

August is National Make-A-Will Month; a great time to reflect on what you've built and the people and values you want to protect.

Brother Will Killebrew den26 found a community that helped him build things that matter. You can help future Triangle members do the same by including an optional gift to the Triangle Education Foundation in your will.

Through our partnership with FreeWill, you can create or update your will for free in about 20 minutes.

Plan for your future. Leave a legacy for Triangle.

Start your free will: https://frwill.link/triangleef0826

08/13/2026

UConn Triangle is coming back! 🔺 We’re less than five months away from the official relaunch of the UConn Chapter.

We’re bringing Triangle brothers together in Connecticut on Saturday, September 19, from 1–3 p.m. at Lucky Lou’s Bar & Grill in Wethersfield. This gathering is open to UConn alumni and Triangle alumni living in the Connecticut area and will be an opportunity to reconnect, meet fellow brothers, and learn more about the chapter’s return.

📍 Lucky Lou’s Bar & Grill | Wethersfield, CT
📅 Saturday, September 19 | 1–3 p.m.
💵 $25 per person

We hope you’ll join us as we look toward the next chapter of Triangle at UConn.

Register and learn more: tinyurl.com/ConnecticutTdT

08/10/2026

The moments. The memories. The brotherhood.

We're excited to finally share our photos from the 2026 Triangle National Convention!

Whether you attended educational sessions, represented your chapter during business meetings, celebrated our award recipients, or simply reconnected with old friends, thank you for being part of it. We hope you returned home inspired and energized for the academic year ahead.

A special thank you to Lucas at Irvine Media for capturing the weekend so beautifully. 📸 Browse the official photo gallery to relive your favorite moments and download your favorite photos: https://irvinemedia.pixieset.com/trianglenationalconference2026/

08/01/2026

Another great day at the 2026 Triangle National Convention! ⛰️

Yesterday’s schedule was packed with our chapter installation, leadership development, CEO conversations, and celebrating our undergraduate members and alumni during College Night.

Check out a few highlights from Day 2!

Address

120 S Center Street
Plainfield, IN
46168

Opening Hours

Monday	8:30am - 5pm
Tuesday	8:30am - 5pm
Wednesday	8:30am - 5pm
Thursday	8:30am - 5pm
Friday	8:30am - 5pm

Telephone

+13178379640

Website

http://www.triangle.org/

Alerts

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