Final 2012 Olympic Medal Count:

The USA won the 2012 Medal Count in all categories at the London Summer Olympics.  The final Summer Olympics Medal Count for countries that won at least 10 medals:

NATION	MEDALISTS				TOTAL
United States	See names	46	29	29	104
China	See names	38	27	22	87
Russia	See names	24	25	33	82
Great Britain	See names	29	17	19	65
Germany	See names	11	19	14	44
Japan	See names	7	14	17	38
Australia	See names	7	16	12	35
France	See names	11	11	12	34
South Korea	See names	13	8	7	28
Italy	See names	8	9	11	28
Netherlands	See names	6	6	8	20
Ukraine	See names	6	5	9	20
Canada	See names	1	5	12	18
Hungary	See names	8	4	5	17
Spain	See names	3	10	4	17
Brazil	See names	3	5	9	17
Cuba	See names	5	3	6	14
Kazakhstan	See names	7	1	5	13
New Zealand	See names	5	3	5	13
Belarus	See names	3	5	5	13
Islamic Republic of Iran	See names	4	5	3	12
Jamaica	See names	4	4	4	12
Kenya	See names	2	4	5	11
Czech Republic	See names	4	3	3	10
Poland	See names	2	2	6	10
Azerbaijan	See names	2	2	6	10

You can find the entire list of the 2012 Summer Olympics Medal Count here.