https://www.uscis.gov/sites/default/files/files/form/i-130instr.pdf
If you are a lawful permanent resident of the United States, you must file a separate Form I-130 for each eligible relative. You may file Form I-130 for:
A. Your spouse;
B. Your unmarried child under 21 years of age; and
C. Your unmarried son or daughter 21 years of age or older.