Vallstanäs herrgård, Manor house in Sigtuna Municipality, Sweden

Vallstanäs herrgård is a manor complex at Lake Fysingen in Norrsunda parish, Sigtuna Municipality. Its main building, given a second storey and its present appearance around 1814, mixes classicism and neo-renaissance, and is flanked by two wings built about the same time. Numerous workers' dwellings and farm buildings surround it.

The estate originated in 1612 when it was transformed from Valsta village into a noble residence. Major renovation work around 1814 gave it the architectural style it displays today.

The property shows how Swedish building styles changed over centuries and came together in one place. Visitors walking around can see how owners shaped their homes according to different tastes and times.

The property is privately owned and requires special permission to visit. It is situated in a rural setting north of Stockholm, accessible by local roads.

A theater once stood in the park and operated until the 1950s, revealing the estate's role as a gathering place for entertainment and social events. This shows the property was far more than just a residence during its heyday.