Armstrong is a compact rural community, unincorporated place, and divisional point on the Canadian National Railway transcontinental railway main line in the unorganized portion of Thunder Bay District in Northwestern Ontario, Canada. The Whitesand First Nation's Armstrong Settlement is coterminous to this community. The Armstrong area is …Armstrong is a compact rural community, unincorporated place, and divisional point on the Canadian National Railway transcontinental railway main line in the unorganized portion of Thunder Bay District in Northwestern Ontario, Canada. The Whitesand First Nation's Armstrong Settlement is coterminous to this community. The Armstrong area is a popular tourist destination in the summer for fishing and hunting.