National conventions in Alpha Phi Omega are biennial gatherings of the respective national organization of the fraternity, in which official business is conducted and brothers from the various chapters in the organization meet to share ideas and expand leadership, friendship, and service. In the very early years, decisions of the National Fraternity were conducted by mail. The first actual assembly of delegates in a convention was held in St. Louis, Missouri, on March 1–2, 1931. Seven of the fraternity's eighteen chapters were represented at this convention by 23 students and advisors."Pledge Manual ." Alpha Phi Omega. March 2005. Retrieved on February 23, 2007.

Alpha Phi Omega of the United States conducts biennial national conventions in even-numbered years, and as of 2016, forty-four conventions have been held. The last convention held was in Austin, Texas and the next will be held in Phoenix, Arizona. Conventions were not held in 1942 and 1944 due to World War II, and a special Constitutional Convention was held in 1967. Alpha Phi Omega of the Philippines conducts biennial national conventions in odd-numbered years, and as of 2009, twenty-five conventions have been held.

In the US, national conventions are officially called to order by an opening ceremony in which members of the Delta Omega chapter at the University of Houston bring forth the Eternal Flame of Service. This tradition was started after the twenty-first national convention in Dallas, Texas. In the early hours of December 30, 1970, the delegates of the Delta Omega chapter met in a ceremony in the suite of H. Roe Bartle, with the newly elected members of the National Board of Directors and National President Aubrey B. Hamilton. Bartle lit a small blue candle which he in turn used to light a hurricane lamp, which was then passed from the blue candle to each of the board members' candles. He then joined the board members to light two four-foot candles. The flame was then taken to Houston and allowed to burn while awaiting the completion of the Eternal Flame site."The Eternal Flame." Delta Omega Chapter of Alpha Phi Omega. Last Revised on January 11, 2005. Retrieved on October 6, 2007.

Convention attendance has grown considerably through the years. In 1932, 88 members were attending the convention and the largest convention attendance in the US to date has been 2,316 in New Orleans, Louisiana in 2002, and the largest number of chapters represented was 235 in Philadelphia, Pennsylvania in 2000.

United States

Convention number Dates Location Theme Attendance (attendees / chapters) References st Mailed ballot ? / 1 Alpha Phi Omega 75 Years of History CD nd and December 1928 Cornell UniversityIthaca, New York Held Concurrently with the 5th National Training Conference for Scout Executives ? / 6 rd – Jefferson HotelSt. Louis, Missouri 23 / 9 $19 million Jefferson Arms buy sets next Pyramid rehab | St. Louis Business Journal th – December 29, 1932 La Salle HotelChicago, Illinois 88 / ? th – December 29, 1934 Hotel PresidentKansas City, Missouri 230 / 21, 14 interest groups th – September 6, 1936 Camp ManatocAkron, Ohio Tenth Anniversary Celebration ? / 26 The Lantern, 29 January 1936 p 4 Scouting Fraternity Will Hold Convention th – December 29, 1938 Hotel DeSotoSt. Louis, Missouri 274 / 51 th – December 29, 1940 Antlers HotelIndianapolis, Indiana Service: Our Contribution to Americanism on College campuses. 312 / 54 Alpha Phi Omega History Book (1925-1993) pp 92-98Indianapolis Times, Indianapolis, Marion County, 25 December 1940 p5 - 300 to attend local session th – Hotel PresidentKansas City, Missouri Service: Our Contribution to a Peaceful World. 349 / 71 Torch & Trefoil. May 1942. Vol. 17, No. 5. p. 2.Torch & Trefoil. November 1942. Vol. 17, No. 8. p. 5. th – La Salle HotelChicago, Illinois To Put Service to Others Ahead of Selfish Aims. 602 / 121 th – Fort Des Moines HotelDes Moines, Iowa 25th Anniversary: The Past, Present, and Future of Alpha Phi Omega. ~600 / 119 th – Deshler-Wallick HotelColumbus, Ohio Service Above Selfish Aims. ~500 / 135 th – Schroeder HotelMilwaukee, Wisconsin Service Past, Present, and Future. 600+ / 121 th – Wilton HotelLong Beach, California 300+ / 85 "Torch & Trefoil ." Alpha Phi Omega. January 1956. Retrieved on October 6, 2007. th – Stephen F. Austin HotelAustin, Texas The Lone Star State in '58. 400+ / 97 th – Benjamin Franklin HotelPhiladelphia, Pennsylvania 35th Anniversary 843 / 156 th – University of Kansas City and Bellerive HotelKansas City, Missouri Lead in Service. ? / 156+ Torch & Trefoil. November 1962. Vol. 37, No. 6. p. 11. th – Brown Palace HotelDenver, Colorado 40th Anniversary 713 / 163 th – Radisson HotelMinneapolis, Minnesota In Brotherhood- Carry On. 1,000+ / 210+ – University of OklahomaNorman, Oklahoma Constitutional Convention 247 / 247 th – Shoreham HotelWashington, D.C. Hand in Hand In Service. 1,603 / 273 st – Marriott Motor HotelDallas, Texas The Three Worlds of Alpha Phi Omega, Tell It Like It Is, Let's Be Significant. nd – Denver HiltonDenver, Colorado Extend A Helping Hand To Your Fellow Man. ~1,000 / ? rd – Stouffer's Riverfront InnSt. Louis, Missouri Golden Opportunities to Serve. 900+ / ? th – Marriott Motor HotelAtlanta, Georgia Service - The Spirit of '76. ~1,100 / ? th – Opryland HotelNashville, Tennessee A Bold Heritage - A Bright Future. ~1,000 / ? th – Marriott HotelLos Angeles, California Lighting the World Through Service. 632 / ? th – Hyatt RegencyKansas City, Missouri Show Me Service. 922 / ? th – Hyatt Regency Washington on Capitol HillWashington, D.C. A Monument to Service. 1,425 / ? th – Hyatt Regency HoustonHouston, Texas Service - The Finest Frontier. 1,334 / 149 th – Denver Marriott City CenterDenver, Colorado Service Above All. 993 / 128 st – Clarion HotelSt. Louis, Missouri Service - Gateway to Our Future. 1,430 / 188 nd – Boston Park PlazaBoston, Massachusetts Leading the Way to Service. 2,000 / ~220 rd – Hyatt Regency DFW AirportDFW Airport, Texas Deep in the Heart of Service. 1,940 / 222 Torch & Trefoil. Fall, 1994. Vol. 70, No. 1. p. 16. th – Hyatt RegencyPhoenix, Arizona Rising to Serve. 1,585 / ~210 Torch & Trefoil. Fall, 1996. Vol. 73, No. 1. p. 1 . th – Hyatt RegencyMinneapolis, Minnesota Leadership, Friendship, and Service: SnowBalled Into One. 1,781 / 227 Torch & Trefoil. Fall, 1998. Vol. 75, No. 1. p. 1 . th – Philadelphia Marriott Downtown Center CityPhiladelphia, Pennsylvania Celebrating our Heritage, Forging Our Future. 2,086 / 235 Torch & Trefoil. Fall, 2000. Vol. 77, No. 1. p. 15. th – Sheraton New OrleansNew Orleans, Louisiana Brotherhood on the Bayou 2,316 / ? Torch & Trefoil. Winter, 2002. Vol. 79, No. 2. p. 14 . th – Adam's MarkDenver, Colorado Service at its Peak 1,488 / ? Torch & Trefoil. Fall, 2004. Vol. 81, No. 1. p. 15 . th – Galt HouseLouisville, Kentucky Unbridled Service 1,652 / ? Torch & Trefoil. Fall, 2006. Vol. 83, No. 1. p. 13 . th – Sheraton BostonBoston, Massachusetts Revolutionary Brotherhood 2,075 / ? st – Hyatt Regency AtlantaAtlanta, Georgia Dream * Lead * Serve nd – Anaheim Marriott HotelAnaheim, California Time to Shine 1,579 / ? rd – Hyatt Regency O'HareChicago, Illinois Inspire, Innovate, IGNITE th – Westin Convention Center PittsburghPittsburgh, PennsylvaniaThis is Our Story th – JW Marriott AustinAustin, TexasBuilding Community1,330 / ?th – December 29, 2020 Virtual th – January 5, 2022 Virtual th – December 30, 2023 Indianapolis Marriott DowntownIndianapolis, Indiana~560 / ?th – December 30, 2025 Philadelphia, Pennsylvania

Philippines

National conventions for Alpha Phi Omega Philippines are biennial gatherings that are currently conducted in odd-numbered years. It is where official business is conducted by the General Assembly composed of brothers and sisters from the various chapters and alumni/alumnae associations meeting to share ideas and to expand leadership, friendship, and service. Following are the past conventions held in the Philippines.