In the 2013 American Community Survey 5,310,285 identified as Scottish and 2,976,878 as of Scots-Irish descent.
Americans of Scottish descent outnumber the population of Scotland, where 4,459,071 or 88.09% of people identified as ethnic Scottish in the 2001 Census.

The number of Americans with a Scottish ancestor is estimated to between 9 and 25 million (up to 8.3% of the total US population), and "Scotch-Irish", 27 to 30 million (up to 10% of the total US population), but these subgroups overlap and are often not distinguishable.

The majority of Scotch-Irish originally came from Lowland Scotland and Northern England before migrating to the province of Ulster in Ireland (see Plantation of Ulster) and thence, beginning about five generations later, to North America in large numbers during the 18th century.
In the 2013 American Community Survey 5,310,285 identified as Scottish and 2,976,878 as of Scots-Irish descent.Americans of Scottish descent outnumber the population of Scotland, where 4,459,071 or 88.09% of people identified as ethnic Scottish in the 2001 Census.
The number of Americans with a Scottish ancestor is estimated to between 9 and 25 million (up to 8.3% of the total US population), and "Scotch-Irish", 27 to 30 million (up to 10% of the total US population), but these subgroups overlap and are often not distinguishable.
The majority of Scotch-Irish originally came from Lowland Scotland and Northern England before migrating to the province of Ulster in Ireland (see Plantation of Ulster) and thence, beginning about five generations later, to North America in large numbers during the 18th century.
Scottish people