National Historic Register properties in Washington county/parish, Iowa
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St. Mary's Parish Church Buildings (Riverside)
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Rubio Bridge (Rubio)
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Baxter, H.A., Coal Company Historic District (Washington)
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Blair House (Washington)
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Brookhart, Smith Wildman and Jennie (Hearne), House (Washington)
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CM and StP Railroad Underpass (Washington)
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Conger, Jonathan Clark, House (Washington)
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Gracehill Moravian Church and Cemetery (Washington)
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Keck, Joseph, House (Washington)
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Kurtz House (Washington)
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McCleery Calendar Factory (Washington)
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Smouse, Winfield, House (Washington)
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Stewart, Frank, House (Washington)
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Washington County Courthouse (Washington)
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Washington County Hospital (Washington)
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Washington Downtown Historic District (Washington)
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West Side Residential Historic District (Washington)
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Woodlawn Cemetery Gates and Shelter (Washington)
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Young, Alexander, Cabin (Washington)
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Johnson, Thomas, Polygonal Barn (Wellman)
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Pilotburg Church (Wellman)