Does All of Wisconsin Have the Same Time?
Yes. All 72 Wisconsin counties use Central Time. Those counties are 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, Menominee, Milwaukee, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pepin, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, St. Croix, Sauk, Sawyer, Shawano, Sheboygan, Taylor, Trempealeau, Vernon, Vilas, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago and Wood.
Wisconsin Statute § 175.09 describes the state's standard as the time of the 90th meridian west of Greenwich, commonly known as Central Time. Current § 175.095 then advances that standard by one hour from 2:00 a.m. on the second Sunday in March until 2:00 a.m. on the first Sunday in November.
72 countiesEvery Wisconsin county follows the same official Central Time rules.
No in-state zone lineYou never change official time zones simply by traveling within Wisconsin.
One IANA rule setAmerica/Chicago handles modern Wisconsin CST/CDT calculations statewide.
Is Wisconsin Ending Daylight Saving Time?
No change is in force as of August 20, 2026. Wisconsin still alternates between CST and CDT under §§ 175.09 and 175.095. The 2026 daylight-saving period began March 8 and ends November 1.
AB 160 and SB 165 in the 2025–2026 Legislature proposed repealing § 175.095 and eliminating daylight saving time, which would have left Wisconsin on Central Standard Time year-round. The Legislative Reference Bureau analysis noted that federal law allows a one-zone state such as Wisconsin to choose standard time throughout the entire state. Both companion bills ultimately failed to pass on March 23, 2026, so Wisconsin's current seasonal clock changes remain in effect.