The National Science Foundation (NSF) Combinatorics program supports research on discrete mathematical structures. The program focuses on several areas within combinatorics, including algebraic, enumerative, existential, extremal, geometric, and probabilistic combinatorics, with graph theory being a notable field of interest. This program is designed to fund research that advances the understanding of these complex mathematical concepts, which have broad applications in both theoretical and applied mathematics, as well as in other scientific disciplines such as computer science and engineering.

Researchers interested in organizing academic events, such as conferences, workshops, or summer and winter schools, are encouraged to submit proposals well in advance of the event—at least six months before the planned date. It is also advisable, where possible, to submit proposals within the same fiscal year, which starts on October 1. Principal Investigators should consult the program solicitation for "Conferences and Workshops in the Mathematical Sciences" to understand the specific requirements and expectations for event proposals.

Proposals for research funding under the Combinatorics program must comply with the submission guidelines set out in the NSF Proposal & Award Policies & Procedures Guide (PAPPG) for Research.gov submissions, or the NSF Grants.gov Application Guide for proposals submitted through Grants.gov. It is essential for proposers to ensure that their submissions meet all the criteria detailed in these guides. Submitting a proposal early does not absolve applicants from meeting the deadlines or compliance requirements.

The program is overseen by the Directorate for Mathematical and Physical Sciences (MPS), through the Division of Mathematical Sciences (DMS). For any questions or further guidance, researchers can contact program directors Stefaan De Winter or Tomek Bartoszynski. The next target date for full proposal submissions is September 23, 2025, and this deadline recurs annually on the fourth Tuesday of September.

This grant opportunity is ideal for researchers in combinatorics and related areas of discrete mathematics, seeking funding to explore innovative theories and applications. The program fosters both individual research projects and collaborative events, helping to advance the field of combinatorics and build a vibrant community of scholars.