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Counties of North Dakota observing Mountain Time Zone
  Entire county observing Mountain Standard Time (MST)
  Part of county observing MST
Counties colored white observe central standard time

A majority of North Dakota counties are located in the Central Time Zone, with 8 counties in the southwest following Mountain Time.

The counties which observe MST are as follows:

IANA time zone database

In the IANA time zone database, North Dakota is covered by five time zones, columns marked "*" contain the data from the file zone.tab:

c.c.* coordinates* TZ* comments* UTC offset UTC offset DST Note
US +415100−0873900 America/Chicago Central (most areas)
US +433649−1161209 America/Boise Mountain - ID (south), OR (east)
US +471551−1014640 America/North_Dakota/Beulah Central - ND (Mercer)
US +470659−1011757 America/North_Dakota/Center Central - ND (Oliver)
US +465042−1012439 America/North_Dakota/New_Salem Central - ND (Morton rural)

References

See also