If Canada were to become the 51st state,

[Wiz Imp]

8. Canadian Provinces by Population and Land Area

PROVINCE/TERRITORY | POPULATION | LAND AREA (SQ. MILES)
Ontario | 14,223,942 | 415,606
Quebec | 8,501,833 | 595,402
British Columbia | 5,000,879 | 364,771
Alberta | 4,262,635 | 255,545
Manitoba | 1,342,153 | 250,120
Saskatchewan | 1,132,505 | 251,371
Nova Scotia | 969,383 | 21,346
New Brunswick | 775,610 | 28,150
Newfoundland and Labrador | 510,550 | 156,456
Prince Edward Island | 154,331 | 2,185
Northwest Territories | 41,070 | 519,744
Yukon | 40,232 | 186,276
Nunavut | 36,858 | 808,199

Ontario would be the 5th largest state by population
Nunavut would be the largest state by land area. There are 4 additional provinces/territories that are larger in land area than Texas.