Montana Title 7. Local Government § 7-2-2202. Limitations on creation of new counties

(1) A new county may not be established that reduces any county to an assessed valuation of less than $12 million, inclusive of all assessed valuation as shown by the last preceding assessment.

(2) A new county may not be formed that contains an assessed valuation of property less than $10 million, inclusive of all assessed valuation, as shown by the last preceding assessment of the county or counties from which the new county is to be established.

(3) A new county may not be established that reduces the area of any existing county from which territory is taken to form the new county to less than 500 square miles of surveyed land, exclusive of all forest reserve and Indian reservations within old counties.

(4) Except as provided in Title 7, chapter 2, part 28, territory may not be taken from one county and added to another county unless its surveyed area is greater than 49 square miles.

(5) A new county may not be formed that contains less than 250 square miles of surveyed land, exclusive of all forest reserve land or Indian reservations not open for settlement.