Is the Word Countywide Hyphenated?

Do not hyphenate other wide words: statewide, nationwide, countywide.

Is it countywide or county wide?

So while the word “county” with the word “wide” would be “county-wide,” with the suffix “-wide” they combine to become “countywide.”

Is nationwide one word or two?

A similar rule is true for "nationwide". We simply use "wide" as a suffix attache to "nation." Do not use a hyphen and write "nation-wide."