Counties with the most prewar homes in Pennsylvania

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- Share of homes built prewar: 29.5%
- Total prewar homes: 16,370

#20. Cambria County
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- Share of homes built prewar: 29.9%
- Total prewar homes: 13,588

#19. Lycoming County
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- Share of homes built prewar: 30.0%
- Total prewar homes: 4,189

#18. Greene County
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- Share of homes built prewar: 31.0%
- Total prewar homes: 8,154

#17. Carbon County
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- Share of homes built prewar: 31.4%
- Total prewar homes: 2,004

#16. Potter County
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- Share of homes built prewar: 31.8%
- Total prewar homes: 17,205

#15. Fayette County
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- Share of homes built prewar: 31.9%
- Total prewar homes: 16,018

#14. Blair County
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- Share of homes built prewar: 32.0%
- Total prewar homes: 42,044

#13. Luzerne County
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- Share of homes built prewar: 32.0%
- Total prewar homes: 9,237

#12. Somerset County
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- Share of homes built prewar: 32.3%
- Total prewar homes: 5,282

#11. Tioga County
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- Share of homes built prewar: 32.4%
- Total prewar homes: 5,208

#10. Warren County
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- Share of homes built prewar: 33.0%
- Total prewar homes: 8,025

#9. Bradford County
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- Share of homes built prewar: 33.2%
- Total prewar homes: 5,894

#8. Jefferson County
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- Share of homes built prewar: 33.7%
- Total prewar homes: 7,083

#7. Venango County
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- Share of homes built prewar: 35.2%
- Total prewar homes: 843

#6. Sullivan County
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- Share of homes built prewar: 35.6%
- Total prewar homes: 31,070

#5. Lackawanna County
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- Share of homes built prewar: 36.4%
- Total prewar homes: 13,596

#4. Northumberland County
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- Share of homes built prewar: 37.0%
- Total prewar homes: 5,834

#3. McKean County
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- Share of homes built prewar: 39.4%
- Total prewar homes: 254,919

#2. Philadelphia County
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- Share of homes built prewar: 43.4%
- Total prewar homes: 24,657

This story features data reporting and writing by Elena Cox and is part of a series utilizing data automation across 50 states.

#1. Schuylkill County
Felix Lipov // Shutterstock