Orange walks are a series of parades held annually by members of the Orange Order during the summer in Northern Ireland, to a lesser extent in Scotland, and occasionally in England, the Republic of Ireland, and throughout the Commonwealth. These typically build up to the 12 July celebrations which mark Prince William of Orange's victory over King James II at the Battle of the Boyne in 1690. Although the term 'march' or 'parade' is widely used in the media, the Order prefers terms such as 'walk' or 'demonstration'.

The 'marching season' generally refers to the months April to August in Northern Ireland and includes marches by groups such as the Ancient Order of Hibernians, the Apprentice Boys of Derry, and the Royal Black Institution as well as the Orange Order. The Orange Order however, is by far the most prolific marching group. Typically each Orange Lodge will hold its own march at some point before the 12th of July, accompanied by at least one marching band. On the 12th of July each district will hold a larger parade consisting of all the lodges in that district, sometimes with the addition of lodges from outside Northern Ireland. This is particularly the case with the Belfast district, whose parade commonly features several Scottish lodges and often some from other countries. In most districts the location of the parade will vary from year to year, rotating around suitable towns. Belfast is an exception, keeping more or less the same route for many decades. The only major parade after the Twelfth is on the last Sunday in October, when lodges celebrate Reformation Day by parading to church.