The Top 50 cities with the maximum number of companies in any given year are: 'Santa Monica', 'Nashville', 'Santa Clara', 'Chicago', 'Philadelphia', 'Denver', 'Dallas', 'Burlington', 'San Francisco', 'San Mateo', 'Milpitas', 'Boulder', 'Bellevue', 'Herndon', 'Pittsburgh', 'Mountain View', 'San Diego', 'Fremont', 'Ann Arbor', 'Irvine', 'Brooklyn', 'Durham', 'Los Angeles', 'Atlanta', 'Alpharetta', 'Menlo Park', 'Rockville', 'San Jose', 'Lexington', 'Saint Louis', 'Sunnyvale', 'Palo Alto', 'Richardson', 'Redwood City', 'Austin', 'Waltham', 'Baltimore', 'Cupertino', 'Houston', 'Cambridge', 'Boston', 'Washington', 'Minneapolis', 'Pleasanton', 'New York', 'Cleveland', 'South San Francisco', 'Portland', 'Seattle'.
Data on the [http://mcnair.bakerinstitute.org/wiki/Top_Cities_for_VC_Backed_Companies Top 50 VC Backed Companies can be found here.]
These were determined by the decide_cities.py script located in: