Montana is about 2.6 times bigger than Tajikistan.

Tajikistan is approximately 144,100 sq km, while Montana is approximately 376,979 sq km, making Montana 162% larger than Tajikistan. Meanwhile, the population of Tajikistan is ~9.1 million people (8.1 million fewer people live in Montana).
Tip: This to-scale comparison of Tajikistan vs. Montana uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.