Thiensville is a village in Ozaukee County. The population was 3,235 at the 2010 census. It was founded by its namesake, John Henry Then. In July 2005, CNNMoney.com ranked Thiensville and neighboring Mequon 19th on its list of the 100 Best Places to Live in the United States.
The area that later became Thiensville was first surveyed between 1834 and 1836, after the United States government removed Native Americans from the land. Weston built the first log cabin in the area, and became the area's first postmaster. He soon sold his land holdings to John Henry Thien.
John Henry Thien (or Jochim Heinrich Thien), was a wealthy German immigrant who had stopped in Milwaukee after leaving Saxony with his wife. They set on finding a place to live in this new area, and journeyed north in 1842. They eventually settled along the Milwaukee River, where Thien purchased 148 acres (0.60 km2) of land and founded Thiensville that same year.
In 1846, the Wisconsin Territorial government formed the Town of Mequon, with borders that included all of present-day Mequon and Thiensville. The first town meetings were held in Thien's home. Thiensville itself was incorporated as a village in 1910, with a population of 289.
Thiensville Park, along the Milwaukee river, hosts the "Family Fun Before the Fourth" annually on the Saturday before July 4. The park also hosts the town's annual Lion's Fest every June.
From June to October, The Thiensville Farmers Market is held by the Milwaukee River in the scenic Village Park (299 Elm St.) every Tuesday (8am - 7pm), where fresh fruits, vegetables, and flowers from area growers are sold.
Main Street, which runs the length of the village, is the site of the Thiensville business district, consisting of many historic buildings which have been converted into small shops and businesses. In November and December, Main Street has a light display for the holiday season.