Fredriksbergs herrgård, Manor house near Oskarshamn, Sweden.

Fredriksbergs herrgård is a Gustavian manor house with smooth wooden facades, columns and pilasters, built in the 1780s on a high stone terrace above the Döderhultsdalen valley. Next to it on a hill stands the old Solberga farm, a white two-storey house, along with its southern wing and a barn.

The estate began as Solberga, an old frälse under Barkestorp that passed to the crown in 1636 and was later bought by Bengt Bagge. It was renamed Fredriksberg on 19 October 1769 after Peter Fredrik von Hegardt of Berga. The manor house was built in the 1780s by cavalry captain Peter Reinke Cederbaum, who died before its completion after 11 years of work. In 1888 Oskarshamn bought it at auction for 346,000 kronor.

The name Fredriksberg was given on 19 October 1769, after Peter Fredrik von Hegardt, then owner of Berga. The estate was earlier called Solberga, and that white two-storey house still stands on a hill beside the manor, together with its southern wing and a barn. Since Christmas 2017 parts of the manor have housed Herrgårdsköket, which takes dinner orders and arranges food and drink events.

The site houses a restaurant called Herrgårdsköket that serves dinner and hosts cooking events throughout the year. A museum managed by the city's cultural department is also located on the property and open to visitors.

The 1888 auction that transferred Fredriksberg to Oskarshamn town covered not only the manor but a large number of smaller farms and land totalling 1,500 hectares. The bid of 346,000 kronor was considered low, a consequence of the agricultural crisis of the 1880s.