American Chemical Society Spring - ACS 2027

ACS promotes the meeting as an opportunity to connect with over 10,000 influential chemists and industry leaders. Historical figures from a recent ACS Spring meeting (Spring 2025, San Diego) illustrate the audience scale and mix: 14,484 attendees, 186 exhibiting companies, an attendee-to-exhibiting-company ratio of 77:1, and 38% first-time attendees. By sector, attendance skewed toward academia at 41%, students at 36%, industry at 12%, government at 5%, and other at 3%, with 49% of attendees holding a Ph.D. Geographically, 86% of attendees came from North America, with 6% each from Asia & Oceania and Europe.

Registration details for ACS Spring 2027 are published by ACS closer to the meeting on the official event page (acs.org/events/spring.html); the meeting typically offers both in-person and digital passes.

For those wishing to present research: abstract submissions for ACS Spring 2027 open in August 2026, and can be submitted by logging in at maps.acs.org. Abstracts for the spring national meeting are typically due toward the end of October.

ACS national meetings have been held for well over a century and are hosted twice a year (spring and fall) by the American Chemical Society, headquartered in Washington, DC. The meetings rotate among major U.S. cities and have grown into some of the largest scientific gatherings in the world. New Orleans has a long history as an ACS host city: the Society's 194th national meeting in New Orleans attracted more than 11,000 attendees, set a record for papers presented at a regular ACS meeting with 4,033, and hosted the largest ACS exposition to that point with 371 booths. More recently, the 253rd ACS National Meeting in San Francisco reached nearly 19,000 attendees, its highest attendance for a national meeting.