ONS Annual Congress 2027

Name: ONS Annual Congress 2027
Start: 2027-04-14
End: 2027-04-18
Location: Walter E. Washington Convention Center

Oncology Nursing Society

Dates: April 14–18, 2027 Confirmed
Location: Walter E. Washington Convention Center, Washington, United States
Expected attendance: About 3,600
Therapy area: Oncology

Official ONS website

About the meeting

ONS Congress brings oncology nurses together for five days of cutting-edge education, meaningful networking, and professional growth. The 2027 edition features comprehensive educational sessions led by field experts, peer-to-peer learning opportunities, a robust Learning Hall, and a variety of industry events covering the latest in cancer care.

Description from the official ONS website. Abstracts are published in Oncology Nursing Forum.

Key dates for ONS 2027

Milestone	Date	Status
Abstract submission opens	August 10, 2026	Confirmed
Abstract submission deadline	September 24, 2026	Confirmed
Late-breaking abstract deadline	January 1, 2027	Confirmed
Abstract notification	November 23, 2026	Confirmed
Meeting	April 14–18, 2027	Confirmed

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Planning ahead: ONS's abstract deadline usually falls about 7 months before the meeting. For the 2026 meeting it was September 25, 2025 (230 days ahead); for the 2025 meeting it was September 26, 2024 (195 days ahead).

Submitting an abstract / At-a-glance

ONS 2027

Full guidelines Submit an abstract

Length: Up to 385 words in the abstract body, including section headers. Longer abstracts are not reviewed. 2026 rules
Tables and figures: One image file allowed. It can hold several figures, tables or images, each with a title. Images are not published. 2026 rules
Who can submit: The primary author must submit. Each primary author can submit up to two abstracts, with at most six authors per abstract. Industry-supported abstracts are posters only. 2026 rules
Membership required: No 2026 rules
Previously presented work: No encore abstracts or work already presented to national or international audiences. Work presented only locally or regionally, and secondary analyses, are accepted. 2026 rules

ONS hasn't published its 2027 guidelines yet. Until it does, items marked 2026 rules show the 2026 requirements. Summarized from ONS's guidelines, checked October 22, 2026. The official guidelines always take precedence.

Common questions

When is the ONS 2027 abstract deadline?

The abstract submission deadline is September 24, 2026 (confirmed), and late-breaking abstracts are due January 1, 2027 (confirmed).

When and where is ONS 2027?

ONS 2027 takes place April 14–18, 2027 at Walter E. Washington Convention Center in Washington, United States. The dates are confirmed.

How many people attend ONS?

About 3,600 people are expected at ONS 2027.

Past editions

Year	Meeting dates	City	Abstract deadline
2026	May 13–17, 2026	San Antonio	September 25, 2025
2025	April 9–13, 2025	Denver	September 26, 2024
2024	April 24–28, 2024	Washington	Not recorded
2023	April 26–30, 2023	San Antonio, TX	Not recorded

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Last updated October 22, 2026. Source: Orbytel Group conference database. Dates marked estimated or not yet announced are our projections, not the organizer's.