The Landeshauptstadt Mainz is the municipal administration and public information service for Mainz, a city presented as a centre of Gutenberg heritage and science. Its website helps residents, businesses and visitors access administrative services, local news and practical information, with online appointment booking and digital services alongside guidance on offices, opening hours and municipal departments.

Residents can find information and apply for services related to identity documents, registration, birth certificates, childcare, housing support, waste collection, vehicle registration, business permits and building approvals. The city also provides access to council and district advisory board information, public notices, job vacancies, procurement opportunities, statistics and election information.

Beyond administration, Mainz shares resources on education, science, culture, sport, mobility, the environment, housing and the local economy. The site highlights initiatives including civic participation, climate action, the Digital City programme and the new Gutenberg Museum. It also supports daily life and leisure with event listings, a city map, transport information, public facility details and guides for visitors.