Exact federal listing answer
Is Free Public Library of Petaluma on the National Register?
Yes · NPS status: Listed
Yes. Reference 88000925 is listed.
Yes. The U.S. National Park Service listed-properties dataset through May 22, 2026 identifies Free Public Library of Petaluma as Listed in the National Register of Historic Places under reference 88000925.
Federal statusListed
National Register reference88000925
Listed dateJune 23, 1988
Property categoryBuilding
Published address20 Fourth St.
LocalityPetaluma, Sonoma County, California
Significance levelLocal
Published acreage0.4
Exact answer boundaryThis confirms the named federal record only.
It does not prove that another address lies inside this property or district, establish local landmark status, decide preservation review, define a legal boundary, or describe ownership or current condition.
Why the wording is date-boundedThe answer reflects the NPS dataset published through May 22, 2026 and a live NPS GIS Listed-status cross-check made September 20, 2026. NPS notes that spatial points and polygons may need correction and are not legal documents.
Additional published fields
Areas of significance: ARCHITECTURE, SOCIAL HISTORY.
Other published names: Old Carnegie Library, Petaluma Historical Library and Museum.
Same locality
Other released Petaluma records.
Each linked page answers a separate named federal record.