First, some data for the U.S. According to the SPLC:
- There are more than 1000 active hate groups, including Neo-Nazis, Klansmen, white nationalists, neo-Confederates, racist skinheads, black separatists, and border vigilantes.
- This figure represents a 67% increase since 2000.
- Since 44th President Barack Obama was elected in 2008, the number of Patriot groups, including armed militias, has grown 813% from 149 in 2008 to 1,360 in 2012.
- Only 5–15% of hate crimes are committed by actual hate groups. (source)
Hate crimes are 18.7 percent more likely to occur in counties with active white supremacist hate group chapters (source).
Nearly two in three hate crimes in the US are not reported to police as victims doubt police can or will help, justice department statistics showed. From 2003-06, 46% of hate crimes were reported, but police were notified only 35% of the time from 2007-11. A study found there was an average of 259,700 hate crime incidents on people over the age of 12 between 2007-11 (source). This somewhat dated FBI statistic shows the distribution over the different types of hate crime in the U.S. in 2004:
In 2004, these percentages cover 7.649 incidents involving 9.035 offenses directed at 9.528 victims. Of course, this covers the U.S. only. About 30% of the offenses involved the crime of intimidation, another 30% assaults, and 35% crimes against property (vandalism etc.). Most of the anti-race crimes were anti-black. Most of the anti-religious crimes were anti-Jewish. Most of the crimes based on sexual prejudice where anti-male homosexual. The anti-ethnicity crimes were mostly anti-Hispanic. Most offenders were white. In 2006 the data were very similar.
After 9-11 there was a sudden increase in the number of anti-muslim hate crimes, but this was a very temporary phenomenon:
More up-to-date numbers are here.
These are the numbers in the U.K.:
Nationally, in 2006-07, police reported 5,619 hate crimes in which someone was injured, 4,350 hate crimes without injury, and 28,485 cases of racially or religiously motivated harassment. There were also 3,565 cases of criminal damage related to hate crimes. The typical hate offender is a young white male (most homophobic offenders are aged 16-20, and most race hate offenders under 30). (source)
43,748 hate crimes were reported to the U.K. police in 2011-12. According to this source, there
are an average of 278,000 hate crimes a year with 40% being reported [In England and Wales], according to a victims survey. However, the number of crimes reported to police seems much lower than that.
Data on the rest of the world are difficult to come by.