Ambleside is a town and former civil parish in the Westmorland and Furness district of Cumbria, England. Within the boundaries of the hi…Ambleside is a town and former civil parish in the Westmorland and Furness district of Cumbria, England. Within the boundaries of the historic county of Westmorland and located in the Lake District National Park, the town sits at the head of Windermere, England's largest natural lake. In 2020 it had an estimated population of 2,596.