The Federal Woodlands Preservation League (French: Ligue contre le déboisement des sites fédéraux) is a volunteer environmental advocacy organization.

Since its founding in 1934, the League has worked with the Canadian Federal Government on preservation issues, and is credited with creating Gatineau Park.

"We talked of starting a 'Society to preserve the Natural Beauty of the environs of Ottawa' – that was the suggested title I gave it, growing out of his wish to bring pressure on Quebec & Fed.

While it operated between 1934 and 1947, members of the league included Governors General Bessborough, Tweedsmuir, and Athlone; Prime Ministers Sir Robert Borden, Arthur Meighen, R.B.

Bennett, and Mackenzie King; Harry Baldwin, Percy Sparks, Duncan MacTavish, Ernest Lapointe, and Ambrose O’Brien.

The Survey outlined eight options to control excessive cutting in the area, including public education, land purchase, and the creation of a national park.

The national park method was downplayed because the size of the area studied – about 16,000 acres (65 km2) – was too small and it was felt the scheme would be too expensive and complicated in the short term.

The entry relates a conversation King had with Finance Minister Charles Dunning concerning the creation of a national park in the Gatineau Hills: He wanted to know what I wished to have done.

I told him I wished them to go ahead with the work, though personally it meant less in the way of seclusion for myself on the way to and from Kingsmere to have even the Meach Lake district open to tourists.

The League dissolved in 1947, when its more prominent members were appointed to the Federal District Commission's Advisory Committee on Gatineau Park.

In 1954, Sparks resigned from the Advisory Committee over a disagreement with Federal District Commission Chairman General Howard Kennedy.