Seniūnaitija ("sub-eldership") is the lowest level administrative-territorial unit in Lithuania. Seniūnaitija is led by a seniūnaitis who represents communities of inhabited places. Seniūnaitis are elected for a 2-year tenure.

The amendment of the law on 15 September 2008 describes the regulations regarding sub-elderships.^[1] The first sub-elderships established by municipalities appeared in November and December 2008, and by 2009, most of municipalities had established sub-elderships.

• Administrative divisions of Lithuania
• Counties (Lithuanian: singular – apskritis, plural – apskritys)
• Municipalities (Lithuanian: plural – savivaldybės, singular – savivaldybė)
• Elderships (or wards) (eldership, ward) (Lithuanian: plural – seniūnijos, singular – seniūnija).
• Cities (Lithuanian: plural – miestai, singular – miestas)
• Towns (Lithuanian: plural – miesteliai, singular – miestelis)