After the defeat of the Irish cause in 1603, however, Hugh O' Neill and Rory O'Donnell took flight secretly to the Continent in 1607. The county was immediately included in the plan for the plantation of Ulster, and its history thereafter merged with that of Ireland. The county, with the exception of the urban districts, is administered by a county council and county manager. The Foyle and Finn basins are intensively cultivated, but the rugged western seaboard is unsuitable. Killbegs on the west coast is the main fishing port, and salmon are being caught in the Rivers Finn, Foyle, Erne, and Gweebarra.
Tourism is important, based on the scenery and the many beaches and golf courses.
In west Donegal, which remains an Irish-speaking region, handmade woolen garments are made, and at Convoy the Donegal tweeds are woven. In the absence of a railway in Donegal, roads provide the communication between towns. Here's some links I found on the Web. Here's an interesting site about the County Donegal Railway Society in the Donegal Railway Heritage Center . Several McGeady men from Donegal worked for the railroad in the U.S., including one of their descendants, Ed Crowley.