There are 26 Uniteds in the first 6 levels of English football, 22 Towns, and 20 Cities. However, there are 47 clubs without a second name (not including clubs that bear the name of two towns).
Not unexpectedly, even though there are more Towns than Cities, Cities tend on average to be higher up the league than Towns.
Excluding one-off names like Hotspur, Forest and Wednesday, the least common names are Rangers and Celtic, which ironically, are the biggest two clubs in Scotland.
Oddly enough, when Newton Heath were considering a new name, Manchester Celtic was one of the alternatives considered.
(Article first posted on Tony Kempster’s Non-League Forum and published on BBC 606)