German Citizenship Through Your Grandparent

Note the tense: §25 StAG was repealed — the section number is still in the Act, but the text under it is gone, and §17(1) StAG today lists only three grounds of loss (renunciation (§26), voluntarily joining the armed forces of a foreign state whose citizenship you already hold, or taking concrete part in a terrorist organisation's combat operations abroad (§28), and withdrawal of an unlawful administrative act (§35)). The repeal took effect June 27, 2024 and is not retroactive, so it changes nothing about a grandparent who naturalized in 1928.

The text of §25 in each era, in German with our translation, is quoted on the dual-citizenship reform page.

One date to get right before you start: the Nationality Act itself only commenced on 1 January 1914. Its predecessor, the 1870 Act, lost citizenship a different way — through ten unbroken years abroad, not through naturalizing. The German missions publish the screen that follows from it. In germany.info's own words, “the German Citizenship Act in the version of 1871-1914 stipulated that a German automatically lost his/her citizenship by residing outside of Germany for more than 10 years”, and “as most immigrants from Germany were affected by this automatic loss of German citizenship, it is usually not possible to base a claim to German citizenship on ancestors who immigrated to the United States before 1904”. If your grandparent's naturalization pre-dates 1914, the question is not a §25 question.

The first date to find: did your grandparent naturalize before or after your parent was born?

• •Grandparent naturalized AFTER parent's birth: your parent was born before that naturalization. The parent's own later naturalization is then asked the same way — did it happen before or after you were born? The marriage and gender rules below, and the 1870 Act above, are separate questions.
• •Grandparent naturalized BEFORE parent's birth: if that was on or after 1 January 1914, read the text of §25 in force on that date on the dual-citizenship reform page — the free eligibility check asks the facts it turned on. Start the free eligibility check → If the chain is broken, the routes are under “If the chain is broken” below.

For US-naturalized ancestors, the authoritative records live in two places:

• •NARA (National Archives) holds federal court naturalizations — indexes, declarations of intention with any certificate of arrival, and petitions, at the facility serving that state. Read its own caveat before you plan around it: “As a general rule, the National Archives does not have naturalization records created in state or local courts.” Those sit with state archives or historical societies. NARA also notes that some federal courts kept their own records, and suggests contacting the courthouse directly for a naturalization before October 1991.
• •USCIS Genealogy Program is the one place that does not care which court sat. Its C-files — September 27, 1906 to March 31, 1956 — are copies of records for naturalizations in federal, state, county or municipal courts, so this is where a state-court naturalization in that window is actually findable. A standard C-file generally contains at least one application form (declaration of intention and/or petition for naturalization) plus a duplicate certificate — USCIS notes that a C-File carries “a copy of the naturalization certificate issued to the new citizen in addition to duplicate court forms”. A-Files are the successor series: USCIS calls them “the individual alien case files, which became the official file for all immigration records created or consolidated since April 1, 1944”, and NARA adds that from April 1, 1956 the INS filed all naturalization records in them. USCIS publishes no closing date for the A-File series on its Genealogy Program page, so confirm with USCIS which A-Files it can release before paying for a records request rather than assuming a cut-off year.
• •What it costs. The Genealogy Index Search (Form G-1041) is $30 filed online or $80 on paper; the Genealogy Records Request (Form G-1041A) that follows it is the same $30/$80 pair. Both figures come from the USCIS Form G-1055 fee schedule, edition 05/29/26, re-read on September 7, 2026. File online — the paper surcharge is not buying you anything.

For BVA submission, you typically need the actual naturalization certificate (or a certified copy) showing the date. Secondary derived records may not satisfy BVA evidentiary standards.

Until April 1, 1953, German law stripped a German citizen woman of her citizenship automatically on marriage to a foreign man — regardless of whether she intended to give it up. If your grandmother was German and married your grandfather (a foreign citizen) before April 1, 1953, she likely lost German citizenship on the wedding date.

If the marriage loss occurred before your parent was born, the grandmother was not German at the moment of the parent's birth, and §4 descent is closed. Your likely alternate path is the §5 StAG declaration. The marriage-loss situation is §5(1) item 2: a German woman who lost her citizenship by marrying a non-German man before April 1, 1953 could not transmit it to children born after that marriage. Your parent is the directly affected person under item 2; you claim in your own right under §5(1) item 4, the descendants clause. The parent does not have to have declared first — BVA's Nr. 4 checklist asks only that the ancestor is entitled under items 1 to 3. What it does mean is extra evidence, not less: the BVA first tests whether the parent you derive the claim from is itself entitled under items 1 to 3, using the details of that parent's own parents — so a descendant's file has to carry the grandparents' records too.

Do not confuse the April 1, 1953 marriage cutoff with the separate May 23, 1949 rule — and do not assume item 4 escapes it. Every §5(1) claimant must have been born after May 23, 1949, descendants included: the opening words of §5(1) are “die nach dem Inkrafttreten des Grundgesetzes geborenen”, and that chapeau governs all four Nummern. BVA's own Nr. 4 checklist opens with the identical line it puts at the top of Nr. 2 — “Ich wurde nach dem 23.05.1949 geboren.” — while Nr. 1 and Nr. 3 open the same way with a closing date added. In practice this rarely bites a grandchild — anyone descended from someone born after 1949 was born later still — but it does bite at the far end of the chain: if the ancestor you claim through was born before that date, they are not an entitled person under items 1 to 3, and item 4 has nothing to attach to.

Before January 1, 1975, a child born in wedlock to a German mother and a foreign father did not inherit German citizenship — only the father's citizenship was transmitted. The Federal Constitutional Court held that incompatible with Art. 3(2) of the Basic Law in BVerfGE 37, 217, decided May 21, 1974, and the law changed on January 1, 1975 as a result. If your grandparent line passes through a German grandmother who married a foreign-citizen grandfather and your parent was born in wedlock before January 1, 1975, your parent did not acquire German citizenship at birth under the rules then in force.

That 1974 decision fixed the rule going forward and did nothing for the people already born under it; closing the gap took the Viertes Gesetz zur Änderung des Staatsangehörigkeitsgesetzes, in force August 20, 2021, which is what created the four §5 declaration paths — this is §5(1) item 1, mother variant. Because it is handled by declaration rather than Feststellung, the application is filed without first proving your parent held German citizenship — §5 starts from the premise that they did not.

If your §4 chain is broken, two alternate paths may apply:

• •§5 StAG declaration — if any gender-based rule (pre-April 1, 1953 marriage, pre-January 1, 1975 wedlock rule, pre-July 1, 1993 non-marital-father rule) explains why German citizenship was not transmitted, §5 StAG may open a route by declaration. It closes on August 19, 2031, and what has to happen by then is receipt at the Bundesverwaltungsamt — not the postmark, and not lodgement at a consulate. See our §5 StAG guide.
• •Art. 116(2) restitution — if your grandparent (or their parent) had German citizenship taken from them between January 30, 1933 and May 8, 1945 on political, racial or religious grounds, Art. 116(2) of the Basic Law provides a constitutional right to restoration that does not depend on an unbroken §4 chain. If they were persecuted on those grounds but never formally deprived — they emigrated and simply lost their German life — the route instead is §15 StAG, the restitution route for people persecuted on the same grounds but not formally deprived. It has FOUR limbs, and only the fourth is about residence: Nr. 1 gave up or lost German citizenship BEFORE 26 FEBRUARY 1955; Nr. 2 were excluded from acquiring it by marriage, legitimation or collective naturalisation; Nr. 3 were refused naturalisation after applying, or were generally excluded from it; Nr. 4 gave up or lost a habitual residence in Germany, whether established before 30 January 1933 or, as a child, after that date too. Nr. 2 and Nr. 3 reach people who never held German citizenship at all, so ‘never formally taken away’ is too narrow a summary of the route. See our Art. 116(2) guide.