To be eligible for federal grant money, you must be a U.S. citizen or national, a refugee, an asylee, a Cuban-Haitian entrant, an indefinite or humanitarian parolee, a conditional entrant (pre-1980) or a lawful permanent resident.
Pell grants are offered to low-income undergraduate students to help supplement their "expected family contribution." Immigrants who meet federal eligibility requirements are eligible to apply.
The Federal Supplemental Educational Opportunity Grant program offers additional funding to those who are in exceptional need and wish to attend college or university. Immigrants can apply if they meet federal eligibility requirements.
Most colleges and universities have their own grants and scholarships that are offered to students. Check with the school's financial aid department for a listing to see which ones you are eligible for.
Some states have passed laws to allow illegal immigrants to register at public colleges and universities as residents in order to be eligible for in-state tuition and grants/scholarships. Check with the school you're interested in to find out whether your state is included.