Conference attendance varied widely across major 2024 events, from 3,723 verified attendees at IPC APEX EXPO to more than 41,000 at RSA Conference. The figures below show how event scale, international reach, professional composition, programming, and commercial activity differed by conference.
Contents
- The largest reported audiences
- International reach and geographic mix
- Who attended
- Exhibitors, buyers, and business activity
- Sessions, speakers, and meeting formats
- Media, social reach, and industry visibility
The largest reported audiences
The largest attendance figures in this group came from technology, healthcare, energy, and trade-oriented events. CES 2024 recorded 138,789 total verified attendees, making it the largest reported audience in the supplied conference figures. Its attendance audit also counted 80,024 verified industry attendees, 53,410 verified exhibitor personnel, and 5,355 verified media attendees (CES 2024 Attendance Audit).
Several other conferences also reached tens of thousands of participants. RSA Conference 2024 attracted over 41,000 attendees (RSA Conference 2024). CACLP 2024 drew 42,751 visitors, a figure that describes visitors rather than the verified-attendee terminology used by CES (CACLP 2024). AHR Expo 2024 was attended by an estimated 50,000 people, so that figure should be read as an estimate rather than an audited total (ASHRAE Winter Conference 2024).
| Conference | Reported attendance | Measurement wording |
|---|---|---|
| CES 2024 | 138,789 | Total verified attendees |
| AHR Expo 2024 | 50,000 | Estimated people |
| CACLP 2024 | 42,751 | Visitors |
| RSA Conference 2024 | More than 41,000 | Attendees |
| HIMSS 2024 | More than 30,000 | Professionals |
| OTC 2024 | More than 30,000 | Participants |
| IAAPA Expo 2024 | Approximately 27,000 | Buyers |
| BIO 2024 | More than 19,500 | Attendees |
| ALA 2024 | 13,532 | Total attendance |
| IPC APEX EXPO 2024 | 3,723 | Attendees |
The source labels use different definitions, so the numbers are best compared as reported event-scale indicators, not as a perfectly standardized ranking. HIMSS 2024 drew more than 30,000 professionals, while OTC 2024 drew more than 30,000 participants (HIMSS Global Health Conference & Exhibition; Offshore Technology Conference 2024). HD Expo + Conference 2024 welcomed over 11,000 total attendees, and AXPONA 2024 welcomed 10,391 attendees (HD Expo + Conference 2024; AXPONA 2024).
Other reported totals included 13,532 at ALA 2024, nearly 3,800 registered attendees at the ASHRAE 2024 Winter Conference, and 3,723 attendees at IPC APEX EXPO 2024 (ALA Annual Conference 2024; ASHRAE Winter Conference 2024; IPC APEX EXPO 2024). These differences illustrate why a conference attendance statistic should identify whether it counts people, visitors, buyers, professionals, participants, or registered attendees.
International reach and geographic mix
CES 2024 reported attendees from 161 countries, regions, and territories (CES 2024 Attendance Audit). Its largest country totals were 82,357 from the United States, 15,802 from South Korea, 8,346 from China, 6,077 from Japan, and 3,761 from Canada. The audit also recorded 2,974 attendees from Germany, 2,582 from France, 2,096 from Taiwan, 1,837 from the United Kingdom, and 1,551 from Mexico (CES 2024 Attendance Audit).
The CES country breakdown continued with 838 attendees from Italy, 754 from the Netherlands, 653 from Turkey, 609 from Sweden, 571 from Hong Kong, SAR, 537 from Israel, 486 from India, 457 from Singapore, 434 from Australia, 416 from Brazil, and 3,761 from Canada (CES 2024 Attendance Audit). The United States total is also the event’s domestic total in the attendance audit: 82,357 domestic verified attendees and 82,357 verified attendees from the United States (CES 2024 Attendance Audit).
At the regional level, CES 2024 recorded 36,017 verified attendees from Middle East/Asia, 12,424 from Europe, 5,975 from North America excluding the United States, 1,235 from South America, 552 from Oceania, and 229 from Africa (CES 2024 Attendance Audit). The audit separately counted 56,432 international verified attendees, giving the event a clear domestic-versus-international attendance split (CES 2024 Attendance Audit).
Other events reported international participation in different ways. HIMSS 2024 represented more than 70 countries, while BIO 2024 included attendees from 70 countries (HIMSS Global Health Conference & Exhibition; BIO International Convention 2024). OTC 2024 drew participants from 107 countries, and IPC APEX EXPO 2024 drew attendees from 57 countries (Offshore Technology Conference 2024; IPC APEX EXPO 2024).
AXPONA 2024 drew attendees from 42 U.S. states and 31 countries (AXPONA 2024). IAA TRANSPORTATION 2024 involved exhibitors from 41 countries and reached a record 73% international participation (IAA TRANSPORTATION 2024). CACLP 2024 had exhibitors from 19 countries and regions, while its professional visitors represented 40 nations (CACLP 2024).
Who attended
The CES 2024 attendance audit provides one of the clearest views of professional seniority. It counted 69,294 senior-level executives, representing 51.9% of verified attendance. Within that total were 15,723 President/Founder attendees, equal to 11.7% of verified attendance; 12,768 C-level executives, equal to 9.5%; and 17,410 Vice President, SVP, or EVP attendees, equal to 13% (CES 2024 Attendance Audit).
The same audit counted 23,393 Director, Senior Manager, or General Manager attendees, equal to 17.5% of verified attendance (CES 2024 Attendance Audit). These categories are useful for understanding audience composition: a conference can be large while still varying substantially in the concentration of decision-makers and senior professionals.
Event-specific audience definitions add further context. IAAPA Expo 2024 drew approximately 27,000 buyers from more than 20,000 buying companies (IAAPA Expo 2024). ALA 2024 reported 8,439 people specifically classified as attendees, alongside 5,093 exhibitors, authors, illustrators, press, and staff, for total attendance of 13,532 (ALA Annual Conference 2024).
RSA Conference 2024 included more than 750 college students, Security Scholars, and faculty at RSAC College Day (RSA Conference 2024). CES 2024 attracted 209 government guests through its Leaders in Technology program (CES 2024 Attendance Audit). These figures show that conference attendance may include distinct communities—buyers, students, government guests, media, exhibitors, and staff—rather than one homogeneous audience.
Exhibitors, buyers, and business activity
Exhibition scale was substantial at many of the events. CES 2024 counted 53,410 verified exhibitor personnel (CES 2024 Attendance Audit). HIMSS 2024 featured more than 1,000 exhibitors, BIO 2024 hosted 1,400 exhibitors, and IAAPA Expo 2024 featured more than 1,100 exhibitors (HIMSS Global Health Conference & Exhibition; BIO International Convention 2024; IAAPA Expo 2024).
Other large exhibition footprints included more than 1,860 exhibitors at AHR Expo 2024, including 344 international exhibitors, and almost 1,300 companies on the OTC 2024 exhibition floor (ASHRAE Winter Conference 2024; Offshore Technology Conference 2024). IAA TRANSPORTATION 2024 had over 1,650 exhibitors, while HD Expo + Conference 2024 featured more than 600 exhibitors (IAA TRANSPORTATION 2024; HD Expo + Conference 2024).
| Event | Exhibition or buyer measure |
|---|---|
| BIO 2024 | 1,400 exhibitors |
| IAA TRANSPORTATION 2024 | More than 1,650 exhibitors |
| AHR Expo 2024 | More than 1,860 exhibitors |
| OTC 2024 | Almost 1,300 companies |
| IAAPA Expo 2024 | More than 1,100 exhibitors |
| HIMSS 2024 | More than 1,000 exhibitors |
| IPC APEX EXPO 2024 | 412 exhibitors |
IPC APEX EXPO 2024 had 412 exhibitors and generated 22,552 qualified sales leads (IPC APEX EXPO 2024). BIO 2024 recorded over 61,000 partnering meetings, a business-activity measure that is distinct from headcount (BIO International Convention 2024). IAAPA Expo’s approximately 27,000 buyers came from more than 20,000 buying companies, connecting attendance with the number of organizations represented (IAAPA Expo 2024).
CACLP 2024 had professional visitors from 40 nations and exhibitors from 19 countries and regions (CACLP 2024). AXPONA 2024 featured 600 global manufacturers, retailers, distributors, and brands, while its 202 dedicated listening rooms describe the event’s specialized exhibition format (AXPONA 2024).
Sessions, speakers, and meeting formats
Conference attendance becomes more meaningful when paired with the amount of programming available to participants. RSA Conference 2024 ran 425 sessions, had 650 speakers, 33 keynote presentations on two stages, and 600 exhibitors (RSA Conference 2024). Its 400 media members were another distinct participant group (RSA Conference 2024).
ASHRAE 2024 Winter Conference held 458 committee meetings and 125 technical sessions, alongside nearly 3,800 registered attendees (ASHRAE Winter Conference 2024). OTC 2024 featured 51 sessions, 14 international pavilions, and 257,350 square feet of exhibit space (Offshore Technology Conference 2024).
HD Expo + Conference 2024 included more than 30 conference sessions and featured 150 industry luminaries (HD Expo + Conference 2024). AHR Expo 2024 covered 527,000 net square feet of exhibit space and included more than 1,860 exhibitors (ASHRAE Winter Conference 2024). Those figures describe programming density and physical scale rather than attendance alone.
BIO 2024’s more than 61,000 partnering meetings indicate a high volume of scheduled business interaction (BIO International Convention 2024). CACLP 2024’s concurrent academic events welcomed 315 academicians and attracted over 5,000 attendees onsite (CACLP 2024). IAA TRANSPORTATION 2024 featured over 145 world and trade fair premieres, adding a content and product-launch dimension to its exhibition statistics (IAA TRANSPORTATION 2024).
Media, social reach, and industry visibility
CES 2024 counted 5,355 verified media attendees from 76 countries, regions, and territories (CES 2024 Attendance Audit). The event also generated 28.5 billion in global social reach and 534,000 social media mentions (CES 2024 Attendance Audit). These are visibility measures, not additional attendee totals, and should not be added to the verified attendance figure.
RSA Conference 2024 reported 400 members of the media, while CES 2024’s 5,355 verified media attendees represented a much larger dedicated media population (RSA Conference 2024; CES 2024 Attendance Audit). The difference reflects the distinct size, sector, and reporting conventions of the two events rather than a universal media-attendance benchmark.
The supplied figures also include a forward-looking comparison point: a NAB Show 2022 preview stated that the event was set to host attendees from 154 countries (NAB Show 2022 preview). This is a preview measure, not a post-event attendance audit. By contrast, NAB Show 2024 registered attendees from 160 countries (NAB Show 2024). Keeping the preview and registration wording explicit prevents a planned geographic reach figure from being mistaken for a completed attendance total.
Together, these statistics show that conference attendance has several dimensions: total people, verified professionals, buyers, countries represented, exhibitors, sessions, meetings, media, and digital reach. The most useful comparison keeps each event’s measurement period and source wording visible, especially when totals are estimated, expressed as “more than,” or drawn from a preview rather than a final audit.