Sam Gillian and his family crossed the Fox River in 1834 and became the first settlers in McHenry County. Other pioneers followed, drawn to the fertile soils and beauty of the rolling grove-studded land. It did not take long for the county to develop a diverse economy supported by dairy farms, mills, resorts, railroads, agricultural production, and much more.

Today, McHenry County is one of the fastest growing counties in the country and the population is expected to reach 500,000 by the year 2015. Algonquin has already doubled its population within the last ten years. Lake in the Hills is actively annexing thousands of acres of land in the southeastern portion of the county. Crystal Lake and Huntley burgeon with aggressive development while other towns expand their boundaries in all directions. Although growth is healthy for the area’s economy, unmanaged and unplanned growth can impact the future of our county’s rural character, as picturesque farms are replaced with tract housing and ancient oak groves and unique vintage buildings are cleared and razed to make room for shopping malls and residential development.

The County Board is sensitive to the potential disappearance of our county’s culture, history and important landmarks. In 1991, the McHenry County Board established the Historic Preservation Commission in concurrence with the enactment of the McHenry County Historic Preservation Ordinance. The Commission strives to preserve our historic heritage through protection and education, as well as encouraging pride in the accomplishments of our county's past.