The citizenship, naturalization, and passport records of the United Kingdom offer crucial genealogical insights, particularly for tracing immigrant and emigrant ancestors. Naturalization records, held at The National Archives (HO series), document foreign nationals who became British citizens from the 19th century onward. These files typically include applications, certificates, and supporting documents detailing birthplaces, occupations, and family members. Earlier denizations and letters of naturalization (pre-19th century) are also accessible. Passport records, though primarily issued for foreign travel and not required for domestic purposes, contain useful personal data from the 19th century onward. For genealogists, these records reveal the legal transitions and mobility of individuals within and beyond the British Isles.
Research your ancestors on MyHeritage
Immigration & Travel
Citizenship, Passport and Naturalization
- United Kingdom, Naturalisation Certificates and Declarations 405,923 records
Search passport and naturalization records in EuropeSearch passport and naturalization records in Europe
- Albania
- Andorra
- Armenia
- Austria
- Azerbaijan
- Belarus
- Belgium
- Bosnia and Herzegovina
- Bulgaria
- Croatia
- Cyprus
- Czechia
- Denmark
- Estonia
- Finland
- France
- Georgia
- Germany
- Greece
- Hungary
- Iceland
- Ireland
- Italy
- Kazakhstan
- Latvia
- Liechtenstein
- Lithuania
- Luxembourg
- Malta
- Moldova
- Monaco
- Montenegro
- Netherlands
- North Macedonia
- Norway
- Poland
- Portugal
- Romania
- Russia
- San Marino
- Serbia
- Slovakia
- Slovenia
- Spain
- Sweden
- Switzerland
- Türkiye
- Ukraine
- United Kingdom
- Vatican City