According to the United States Census Bureau, the CDP has a total area of 3.6 square miles (9.3 km2), all land.

Church Hill, or Churchill as it was later shortened by the Gallatin County Road Department, is at the center of Montana's largest Dutch settlement.

The large church on the hill is the probable origin of the name, and once was the largest wooden structure west of the Mississippi River.

[4] In the late 1890s, Dutch immigrants came to the Gallatin Valley, with the aid of the Manhattan Malting Company,[3] and created a "linear settlement" of homes, farms, and ranches that stretched roughly 14 miles south of Manhattan, with Amsterdam and Churchill roughly in the middle.

Recognizing the growth of the community, the Northern Pacific designated a siding called Amsterdam to the west of "the hill" along its Anceney Spur.

& St. Paul Railway (aka:the Milwaukee Road) created a siding for agricultural goods about two miles to the east of Churchill along its Gallatin Valley Railway called the "Holland Siding", subsequently the "east of the hill" became known on maps as Holland.