Vahto is a former municipality in the Southwest Finland region of Finland. It was consolidated with the municipality of Rusko on January 1, 2009, and has since formed part of Rusko rather than existing as an independent administrative unit.
As a former municipality, Vahto no longer has its own separate municipal government or administration. Its territory and residents were absorbed into Rusko as part of the consolidation.
Vahto is located in the Southwest Finland region, in the southwestern part of the country. Beyond its status as a former municipality and the date of its merger with Rusko, few further details are recorded in the available source material.