Naturalizations for Ripley County, Indiana may be found in:

• Court Order Books (See Ripley County Court Records)
• Probate Order Books (See Ripley County Probate Records)
• Separate naturalization volumes

Online databases:

• Naturalizations Index, 1851-1928

Family History Library Microfilm:

• Naturalizations, 1851-1928

Books:

• An Index to Naturalization Records in Pre-1907 Indiana County Courts. Indiana Historical Society : Indianapolis, 2001. [Amazon Affiliate Link]