Elkhorn is a Western neighborhood of the city of Omaha, Nebraska, United States. The population was 6,062 at the 2000 census and was estimated by the Census Bureau at 8,192 in 2005 before it was annexed into Omaha in 2007. It was named after the Elkhorn River. Elkhorn was founded in 1865, platted in 1867, and was incorporated in 1872. It later became uncharted before re-incorporating in 1886. In the 1990s, Elkhorn began annexing municipalities near itself to avoid annexation from Omaha. However, in 2007, Omaha annexed the city.