In January 2007, the town of Fishers proposed annexing Geist. The proposed annexation area included approximately 2,200 homes in an unincorporated area of Hamilton County. In 2008, Geist residents collected 1,700 signatures and filed suit to stop Fishers from annexing their homes into the Fishers tax base. The suit was turned over to Hamilton County Superior Court, and on December 31, 2008, the judge ruled that Fishers could annex 2,200 upscale homes surrounding Geist Reservoir. On January 20, 2009, Geist residents surprisingly announced they wouldn't appeal the judge's decision. For tax reasons, the annexation was not made official until January 2, 2010.
The waterfront amenities offered at Geist have made it a haven for athletes, politicians, socialites, and businessmen. Past and present residents have included Reggie Miller, Paul George, George Hill and Mitch Daniels. Some of whom are more infamous than famous such as Tim Durham and Marcus Schrenker.