Nekoosa is a city in Wood County, Wisconsin, United States. Its name derives from the Ho-Chunk word, "Nįįkuusra", "Nakrusa", or "Nįkusar…Nekoosa is a city in Wood County, Wisconsin, United States. Its name derives from the Ho-Chunk word, "Nįįkuusra", "Nakrusa", or "Nįkusara" which translates to "running water". The population was 2,580 at the 2010 census.