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24 open Department of the Interior grants

Grant opportunities from Department of the Interior on Grants.gov that are still open, soonest deadline first.

Updated Oct 18, 2026 · source: Grants.gov
Fish and Wildlife Service

FY2026 Implementation of the Quagga and Zebra Mussel Action Plan (QZAP) in the Western United States

F26AS00107 · Up to $600K

Due Oct 24, 2026Official listing on Grants.gov ↗
Fish and Wildlife Service

F26AS00071 Cooperative Endangered Species Conservation Fund: Habitat Conservation Plan Land Acquisition Grants

F26AS00071 · Up to $26M · Cost share required

Due Oct 30, 2026Official listing on Grants.gov ↗
Geological Survey

Cooperative Agreement for Affiliated Partner with the Southern Appalachian Cooperative Ecosystem Studies Unit (CESU)

G27AS00165 · Up to $330K

Due Oct 30, 2026Official listing on Grants.gov ↗
Fish and Wildlife Service

F25AS00332 Highlands Conservation Act – Competitive Funding Round

F25AS00332 · Up to $3.9M · Cost share required

Due Oct 31, 2026Official listing on Grants.gov ↗
Fish and Wildlife Service

F25AS00379 Highlands Conservation Act - Base Funding Round

F25AS00379 · Up to $2.3M · Cost share required

Due Oct 31, 2026Official listing on Grants.gov ↗

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National Park Service

Exploring and Enhancing Outdoor and Heritage Tourism in the Chesapeake Bay Watershed

P27AS00032 · Up to $50K

Due Nov 4, 2026Official listing on Grants.gov ↗
Geological Survey

WATER RESOURCES RESEARCH ACT PROGRAM NATIONAL COMPETITIVE GRANTS FY2026 (104g General)

G27AS00164 · Up to $120K · Cost share required

Due Nov 12, 2026Official listing on Grants.gov ↗
Fish and Wildlife Service

F26AS00030 Cooperative Endangered Species Conservation Fund: Recovery Land Acquisition Grant Program

F26AS00030 · Up to $14.2M · Cost share required

Due Nov 20, 2026Official listing on Grants.gov ↗
Bureau of Reclamation

Native American Affairs: Fiscal Year 2025 Colorado River Basin Tribal Drought Resiliency Program

R26AS00021 · Up to $1M

Due Nov 20, 2026Official listing on Grants.gov ↗
Fish and Wildlife Service

F26AS00023 FY2026 Prescott Marine Mammal Rescue and Response Grant Program

F26AS00023 · Up to $150K · Cost share required

Due Nov 30, 2026Official listing on Grants.gov ↗
Fish and Wildlife Service

F26AS00084 Aquatic Invasive Species Grants to Great Lakes Tribes - Fiscal Year 2026 Great Lakes Restoration Initiative

F26AS00084 · Up to $100K

Due Dec 31, 2026Official listing on Grants.gov ↗
Fish and Wildlife Service

F26AS00083 Aquatic Invasive Species Grants to Great Lakes States - Fiscal Year 2026 Great Lakes Restoration Initiative

F26AS00083 · Up to $600K

Due Dec 31, 2026Official listing on Grants.gov ↗
Fish and Wildlife Service

F26AS00085 Aquatic Invasive Species Interjurisdictional Grants to the Great Lakes States and Tribes - Fiscal Year 2026 Great Lakes Restoration Initiative

F26AS00085 · Up to $924K

Due Dec 31, 2026Official listing on Grants.gov ↗
National Park Service

Outdoor Recreation Legacy Partnership Program (ORLP) Recurring Notice 5 Year

P26AS00125 · Up to $15M · Cost share required

Due Nov 1, 2030Official listing on Grants.gov ↗
National Park Service

Readiness and Recreation Initiative (RARI) – Recurring 5 Year Notice

P26AS00146 · Up to $3M · Cost share required

Due Nov 30, 2030Official listing on Grants.gov ↗

Related: open NIH (National Institutes of Health) grants open CDC grants open HHS (Health and Human Services) grants open NSF (National Science Foundation) grants open Department of Defense grants open Department of Justice grants open State Department grants open USDA (Department of Agriculture) grants