Gay people make up 1-4% of the population in most cities, but are more concentrated [PDF] in metropolitan areas.

Professor Gary Gates of the UCLA Williams Institute compiled the following data [PDF] in 2006 for major cities:

Highest Number of Same Sex Couples:

1. New York, NY: 47,000
2. Los Angeles, CA: 12,000
3. Chicago, IL: 10,000

Highest Concentration of Gay People:

1. San Francisco, CA: 15.4%
2. Seattle, WA: 12.9%
3. Atlanta, GA: 12.8%

Lowest Concentration of Gay People:

1. Detroit, MI: 1.5%
2. Richmond, VA: 3.4%
3. Cleveland, OH and Memphis, TN: 3.5%

Related posts:

1. Gay Marriage: Facts and Statistics
2. How Many Gay Couples Are There?