Foo (符) population in USA

Best estimate29 December 2010

Sun-Hoo Foo

US population has increased from 281,421,906 in 2000 to 308,745,538 in 2010. From the Genealogy Data： the most frequent occurring Surnames from Census 2000 are as follow: http://2010.census.gov/2010census/#panel-1

Name	Number Of Occurrences
Smith	2,376,206
Johnson	1,857,160
Williams	1,534,042
Brown	1,380,145
Jones	1,362,755
Miller	1,127,803
Davis	1,072,335
Garcia	858,289
Rodriguez	804,240
Wilson	783,051

• Technical Documentation: Demographic Aspects of Surnames from Census 2000 [PDF – 122k]
• File A: Top 1000 Names [XLS – 132k]
• File B: Surnames Occurring 100 or more times [ZIP – 357k] (151,671 records)

From the 2000 US census, they are 4,040,966 last name with the frequency occurrence listed in the table shown below. 65% of the last name has only one occurrence!!! One of the reason why there are so many last names is because women might combine their last name with their spouse's, and that becomes a unique one of a c kind last name.

Last Names by Frequency of Occurrence and Number of People: 2000

Last Names						People with these Names
Frequency of Occurrence	Number	Cumulative Number	Cumulative Proportion (percent)	Number	Cumulative Number		Cumulative Proportion (percent)
1,000,000+	7	7	0.0	10,710,446	10,710,446		4.0
100,000-999,999	268	275	0.0	60,091,601	70,802,047		26.2
10,000-99,999	3,012	3,287	0.1	77,657,334	148,459,381		55.0
1,000-9,999	20,369	23,656	0.4	58,264,607	206,723,988		76.6
100-999	128,015	151,671	2.4	35,397,085	242,121,073		89.8
50-99	105,609	257,280	4.1	7,358,924	249,479,997		92.5
25-49	166,059	423,339	6.8	5,772,510	255,252,507		94.6
10-24	331,518	754,857	12.1	5,092,320	260,344,827		96.5
5-9	395,600	1,150,457	18.4	2,568,209	262,913,036		97.5
2-4	1,056,992	2,207,449	35.3	2,808,085	265,721,121		98.5
1	4,040,966	6,248,415	100.0	4,040,966	269,762,087		100.0

And I look at Chinese last name符, which can be spelled as Foo, Fou, Pou, Fu.etc.
Name          Rank  count prop 100k    Cum pop    % White % Black %  API %        2 race    %Hispanic

POU	21651	1122	0.42	75849.23	30.93	21.3	9.98	(S)	(S)	35.74
FOO	20995	1167	0.43	75567.03	6.6	2.14	80.29	0	9.85	1.11
FU	5658	5624	2.08	61573.76	1.9	(S)	94.13	(S)	2.03	1.65

Fu （May be 符，傅， 富，阜 etc） ranges 5658 with 5624 occurrences, Foo (符，傅 etc.) ranges 20995 with 1167 occurrences Pou ranges 21651 with 1122 occurrence. However most of them are list as Hispanic, white or black., and only 10% is API.
For Fu and Foo, most of them are Asian pacific islander (API) or 2 races.( 94%+2%, 80%+10%), and I presume most of them are Chinese. Other符 may spells differently if they are from e.g. Thailand , Indonesia.. etc. But they are the minority
Therefore , the population of符in America is much less than 6791, likely around 2000 to 3000 ( since the population of 傅 is expected to be more than符).