Wisconsin, County Naturalization Records, 1807-1992
Naturalization records and digitized indexes from county courthouses in Wisconsin. The record content and time period varies by county.
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Wisconsin, County Naturalization Records
What is in This Collection?
This collection contains naturalization records from county courthouses in Wisconsin. The record content and time period varies by county. Be aware that immigrants could naturalize in any court that performed naturalizations including city, county, state and federal courts. As a result they often selected the most convenient court. If they lived in the Eastern District but worked elsewhere, they may have gone to a court closer to work. To begin, look for naturalization records in the courts of the county or city where the immigrant lived. If the county has an index search it first. Next look for the petition (second papers), because they are usually easier to find in courts near where the immigrant eventually settled. After 1906, the declaration can be filed with the petition as the immigrant was required to submit a copy when he submitted the petition.
The collection includes the following counties: Adams, Ashland, Barron, Bayfield, Brown, Buffalo, Burnett, Calumet, Chippewa, Clark, Columbia, Crawford, Dane, Dodge, Door, Douglas, Dunn, Eau Claire, Florence, Fond du Lac, Forest, Grant, Green, Green Lake, Iowa, Iron, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Langlade, Lincoln, Manitowoc, Marathon, Marinette, Marquette, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pepin, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sawyer, Shawano, Sheboygan, St. Croix, Taylor, Vilas, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago, and Wood.
Additional records and/or images may be added to this collection in the future.
To Browse This Collection
| You can browse through images in this collection using the waypoints on the Collection Browse Page for Wisconsin, County Naturalization Records, 1807-1992. |
What Can These Records Tell Me?
The following information may be found in these records:
- Full name
- Current residence
- Birth date and place of birth
- Date Naturalized
- Name of court
- Age when naturalized
- Spouse's name, married
- Names of children
- Arrival date and port of entry
- Certificate number
Collection Details
Location of Original Records
State Historical Society of Wisconsin, Madison
"Wisconsin, County Naturalization Records, 1807-1992." Database with images. FamilySearch. https://FamilySearch.org : 28 November 2025. State Historical Society of Wisconsin, Madison.