This article attempts to list the oldest extant, freestanding buildings in the state of Wisconsin.
Some dates are approximate and based on architectural studies and historical records; other dates are based on dendrochronology.
All entries should include citation with reference to: architectural features indicative of the date of construction; a report by an architectural historian; or dendrochronology.
If the exact year of initial construction is estimated, it will be shown as a range of dates.
To be listed here a site must: