To be eligible for lawful permanent residence based on a family relationship you must meet the following criteria:

You must have a relative who is a United States citizen or a lawful permanent resident of the United States who can provide documentation proving their status and is willing to sponsor you for lawful permanent residency by filing the I-130, Petition for Alien Relative.

Your relative must prove they can support you by providing documentation that their income is at least 125% above the U.S. poverty level for their household size, including you and all other sponsored family members. For more details about the meeting this criteria and filing the Affidavit of Support, see Filing an Affidavit of Support for a Relative.

If your relative is a US Citizen and they can legally prove you share one of the following relationships, you may be eligible for lawful permanent residency (please see Preference Categories & Visa Numbers, below):
oHusband or wife
oChild under 21 years old;
oUnmarried son or daughter over 21;
oMarried son or daughter of any age;
oBrother or sister if you are at least 21 years old; or
oParents if you are at least 21 years old

If your relative is a lawful permanent resident and they can legally prove you share one of the following relationships, you may be eligible for lawful permanent residency (please see Preference Categories & Visa Numbers below):
oHusband or wife; or
oUnmarried son or daughter of any age