Hello selldog-ga and thank you for your question.
Although estimates vary wildy the most recent and reliable results
come from the 2000 US census. It states that 4,890,581 people are of
Scottish descendents, and that 4,319,232 people are of Scottish-Irish
4,319,232 (Scottish-Irish are Scots who moved to Ireland, then moved
to the United States)
So the two groups combined gives us a total of 9,209,813 people who
claim to have some Scottish heritage.
see below for details:
"QT-P13. Ancestry: 2000
Data Set: Census 2000 Summary File 3 (SF 3) - Sample Data
Geographic Area: United States
Ancestry Number Percent of total population
Scottish 4,890,581 1.7
Scotch-Irish 4,319,232 1.5"
"In the 2000 Census, 4.9 million Americans reported Scottish ancestry,
1.7% of the total US population. Given Scotland's population (just
over 5 million), there are almost as many Scottish Americans as there
are native Scots living in their home country. Another 4.3 million
reported Ulster Scots ancestry, for a total of 9.2 million Americans
of Scots descent."
"More than 27 million Americans today can trace their lineage to the Scots,"
"25 million Americans currently identify themselves as having Scottish heritage."
"The popularity of Scottish music is also increasing in the US and
there are currently 23 million Americans of Scottish heritage and 6
million people belonging to a Scottish interest group living in the
"Estimates of the number of Americans claiming Scottish heritage vary,
but most agree that upwards of 20 million Americans have some
ancestral links to Scotland."
"Finding out that over 20 million Americans claim Scottish heritage made the
crossover of music much more obvious to me."
"The latest U.S. Census counted some 13 million Americans of Scottish descent"
"The Tartan Card aims to cash in on the 12 million Americans with
Scottish connections and bears the logo, "Proud American Scot,"
"In an effort to woo the estimated 11 million Americans of Scottish
heritage, VisitScotland has launched a new promotion in October,"
"According to the 2000 U.S. Census, 9.2 million Americans consider
themselves primarily of Scottish or Scotch-Irish descent, which is
more than 3.2 percent of the population. Scotch-Irish are Scots who
moved to Ireland, then moved to the United States."
"The 2000 census reported that almost 5 million Americans are of
Scottish heritage, and 4.3 million of Scots-Irish descent."
Thank you for your question, and if you need any clarification of my
answer, do not hesitate to ask prior to rating my answer.
Very best regards
Search strategy included:
"million Americans" "scottish heritage"