Source library
The official places AHIG recommends checking first
The source list below is intentionally simple. It keeps applicants close to the pages that publish or explain grants directly, rather than depending on secondary summaries that may leave out a deadline or eligibility rule.
When a funding opportunity matters, always return to the original announcement, the agency’s own guidance, and any system required for registration or submission.
Federal portal
Grants.gov
Primary federal site for finding and applying for grant opportunities.
Learning center
Grants.gov Learn Grants
Useful for understanding the grant process, terms, and application basics.
Registration and records
SAM.gov and USAspending.gov
Helpful for registration, entity checks, and public award visibility.
Public guidance
USA.gov
General federal information hub that points users toward the right assistance path.
Agency grants
HHS, NIH, and other federal funders
Agency program pages often explain funding purpose, eligibility, and reporting rules in more detail than a summary listing.
Sector-specific
USDA, NSF, DOE, and the arts agencies
Many mission-driven grants are published directly by the funder, especially in health, research, rural development, energy, and the arts.