Also Mankato, MN (53,000), St. Cloud, MN (110,000), Sioux City, IA (116,000), Rock Hill, SC (105,000) and Alton, IL (83,000) are missing. I think there might have been a couple others but I've forgotten now.
Many of these are compound names with the Census Bureau (Palm Coast--Daytona Beach--Port Orange, FL or Leominster--Fitchurg, MA) where the more well known, more compact business center is technically outpopulated by a sprawling suburb with technically large municipal limits and the Census folks don't seem to care. Some, like Virginia Beach (Norfolk) include an older much more established city that is the true heart of the urbanized area, but they just leave it out of the name altogether.
Whoops, Mankato is there. Salisbury, MD and Salisbury, NC are missing.
Granted, the urban areas do have odd anomalies such as considering Riverside a separate urban area of millions of people abutting empty inland desert and Los Angeles; San Francisco and San Jose being separate urban areas, etc.
Here are the government lists:
"Urbanized areas" (above 50,000 people) :https://www2.census.gov/geo/docs/reference/ua/ua_list_ua.xls
"Urban clusters" (2,500 to 49,999 people) :https://www2.census.gov/geo/docs/reference/ua/ua_list_ua.xls
Or everyone's favorite, Wikipedia: "https://en.wikipedia.org/wiki/List_of_United_States_urban_areas
Also, Texas City is almost completely turned green when Houston is entered. It makes it appear as if Texas City is already answered.
I know we have pointed out corrections, but this is a great quiz, much more accurate statistics than others and the fill-in map is great work. It really helps in remembering what's already been answered. We appreciate the time quiz makers put in even if comment sections look like the complaint line after Christmas.
Funny how Pittsfield is included despite having a lower population than New Bedford.