Mazsalaca Manor, also called Valtenberga or Valtenberģi Manor, is a manor house in the historical region of Vidzeme, in northern Latvia. It was built before 1780 in German Classical style. Severely damaged by fire in 1905, the mansard roof was repaired in 1911 to preserve the remaining structure. Restoration was finally completed after 1925, and the building has housed the Mazsalaca secondary school ever since.

• List of palaces and manor houses in Latvia

• Zarāns, Alberts (2006). Latvijas pilis un muižas. Castles and manors of Latvia (in Latvian and English). Riga. ISBN 9984-785-05-X. OCLC 72358861.{{cite book}}: CS1 maint: location missing publisher (link)

• (in Latvian) Valtenberģi Manor
• Media related to Mazsalaca Manor at Wikimedia Commons

57°51′44″N 25°02′12″E / 57.8623°N 25.0366°E / 57.8623; 25.0366