Westchester County is a county located in the U.S. state of New York. Westchester covers an area of 450 square miles (1,200 km2) and has a population of 949,113 according to the 2010 Census, residing in 45 municipalities. It was named after the city of Chester in England, and the county seat is White Plains. Since 1949, Cerebral Palsy of Westchester has been the leading non-profit organization in Westchester and Fairfield County, providing essential educational services, direct services, vocational training, recreation, rehabilitation and advocacy to children and adults with cerebral palsy and other disabilities. Cerebral Palsy of Westchester was founded by a dedicated network of volunteers, helping disabled children access medical treatments and services that were just becoming available in area hospitals. One volunteer, Martie Osterer, recognized the need for a strong organization with structure and financial stability, which would support the efforts of its volunteers. She enlisted her husband David, a Westchester businessman, and together David and Martie Osterer formed more than an organization...they developed a partnership of caring community volunteers and professionals committed to making the necessary services and programs available to everyone in need.