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FAMILY-BASED · 05

Who Can Petition for Whom: Relatives U.S. Citizens and Permanent Residents May Sponsor and the Age-21 Threshold

U.S. citizens must be at least 21 years old to petition for parents or siblings; permanent residents may petition only for spouses and unmarried children.

English translation of this site's original Chinese explainer · 6 official sources · read 2026-10-10 UTC · not legal advice

01

Relatives for Whom U.S. Citizens May Petition

U.S. citizens may petition for spouses and unmarried children under 21 (immediate relatives); to petition for a parent, the citizen must be at least 21 years old. Citizens may also petition for unmarried sons and daughters age 21 or older (F1) and married sons and daughters (F3); to petition for siblings (F4), the citizen must likewise be at least 21 years old.

The I-130 instructions also state that, when a citizen petitions for an immediate relative, the parent category requires that the “petitioner be at least 21 years old.”

Sources for this section · 4

02

Relatives for Whom Permanent Residents May Petition

Permanent residents may petition for spouses and unmarried children under 21 (F2A), and unmarried sons and daughters age 21 or older (F2B). Permanent residents cannot petition for parents, siblings, or married sons and daughters; only citizens may petition for these relatives.

Sources for this section · 3

03

The Meaning of “Child” Under Immigration Law

Under immigration law, a “child” must be unmarried and under 21, and must meet one of the relationship definitions in 8 U.S.C. 1101(b)(1): a child born in wedlock, a stepchild, a legitimated child, a child born out of wedlock, or a qualifying adopted child. Those over 21 or married are legally termed a “son or daughter” and fall within preference categories such as F1, F2B, and F3.

For the specific requirements for each relationship (such as the requirement that the marriage creating the stepparent relationship occur before the child turns 18), see the article “Stepchildren, Legitimation, and Children Born Out of Wedlock.”

Sources for this section · 1

04

A Separate Petition for Each Relative; Derivative Rules Vary by Category

Except for those who may qualify as derivative beneficiaries, each relative needs a separate I-130. In the preference categories (F1–F4), the principal beneficiary’s spouse and unmarried children under 21 may accompany the principal as derivatives; the immediate relative (IR) category has no derivatives, so spouses or children must each qualify independently and have separate petitions filed for them.

Sources for this section · 3

Frequently asked questions

I am 20. Can I petition for my parents?

No. A citizen must be at least 21 years old to petition for parents.

Can a green card holder petition for parents?

No. Only citizens who are at least 21 years old may do so.

Related category codes

Each code page shows its own review status; candidate content is not upgraded to reviewed because of this article.

Related articles

All official sources

  • USCIS · Green Card Eligibility CategoriesSupports: Official groupings and brief eligibility requirements for family-based, employment-based, special immigrant, refugee/asylee, T/U, VAWA, and other categories.Official update 2026-09-04 · read 2026-10-10 UTC
  • USCIS · Green Card for Family Preference ImmigrantsSupports: Definitions of F1, F2A, F2B, F3, and F4; spouses and unmarried children under age 21 of principal applicants in family preference categories may qualify as derivative applicants.Official update 2025-07-08 · read 2026-10-10 UTC
  • USCIS · I-130, Petition for Alien RelativeSupports: I-130 is used to establish a qualifying family relationship; filing or approval alone does not confer status; followed by I-485 or consular processing; a separate petition is generally filed for each relative.Official update 2026-10-07 · read 2026-10-10 UTC
  • USCIS · Green Card for Immediate Relatives of U.S. CitizenSupports: Definition of immediate relatives; spouses and children of immediate relatives cannot qualify as derivative beneficiaries and must qualify independently.Official update 2026-01-30 · read 2026-10-10 UTC
  • USCIS · Family of Green Card Holders (Permanent Residents)Supports: Permanent residents may petition for spouses and unmarried children.Official update 2015-07-14 · read 2026-10-10 UTC
  • U.S. Code (GovInfo 2024 edition) · 8 U.S.C. 1101(b)(1) – Definition of childSupports: Children must be unmarried and under 21; for stepchildren, the marriage creating the relationship must have occurred before age 18; legitimation must occur before age 18 and while in the custody of the legitimating parent; a child born out of wedlock must have a bona fide parent-child relationship with the natural father; adoption must occur before age 16, with 2 years of legal custody and joint residence (the sibling exception extends the age limit to 18); definition of an orphan.Official update not stated · read 2026-10-10 UTC