Halder is an unincorporated community located in the town of Emmet, Marathon County, Wisconsin, United States. The community was named for George Halder, a Wausau, Wisconsin alderman. The post office was established in July 1887.
Notable people Thomas O'Connor, farmer and politician, lived in Halder.'Wisconsin Blue Book 1891,' Biographical Sketch of Thomas O'Connor, pg. 595
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