Montana
According to 2000 Census Bureau, there were 902195 people, 358667 households, and 237407 families residing in the state. The population density was 6.2 people per square mile (2.39/km˛), it is United States's third least densely populated state. There were 412633 housing units at an average density of 2.8 per square mile (1.08/km˛). The average household size was 2.45 persons, and the average family size was 2.99 persons. In the state the population was spread out, with 25.5% under the age of 18, 9.5% from 18 to 24, 27.2% from 25 to 44, 24.4% from 45 to 64, and 13.4% who were 65 or older. For every 100 females there were 99.3 males. For every 100 females age 18 and over, there were 97.2 males. The median age was 37.5 years, The median age of males was 36.6 years, for females the median age was 38.5 years. According to July 2008 Census Bureau estimates, the population of the state is 902195, The racial or ethnic makeup of the state was 90.58% White, 0.3% Black or African American, 6.21% American Indian, 0.52% Asian, 0.05% Native Hawaiian, 1.74% from two or more races and 0.59% Other races.
The median income for a household in the state was $33024, making it the fifth poorest state by median household income among the United States. The median income for a family in the state was $40487, it is sixth poorest state by median family income in United States. The per capita income for the state was $17151, making it the fifth poorest state by per capita income among the United States. The median income was $17232, Median income for males is $22388, compared with $12936 for females. According to the United States Bureau of Economic Analysis, the 2008 total gross domestic product was $35.9 billion, Montana would be the fourth lowest state by gross domestic product in the U.S. state of America. Its GDP per capita is $28170. Montana's GDP increased 4.7% from 2007.
In 2000, 241754 pupils and students, of which 50.55% are male and 49.45% are female, 26.8% of the total population, are in the education system. Of which, percentage of enrollment student are in, 5.66% nursery or pri school, 4.98% kindergarten, 44.91% elementary school, 23.25% high school and 21.2% College graduate school.
| Rank | County | Total Area mi2 | Land Area mi2 | Water Area mi2 | Population | Density mi2 | Per capita Income | House hold Income | Family Income |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Beaverhead County | 5572.04 | 5542.31 | 29.73 | 9202 | 1.7 | 15621 | 28962 | 38971 |
| 2 | Big Horn County | 5014.65 | 4994.81 | 19.84 | 12671 | 2.5 | 10792 | 27684 | 31095 |
| 3 | Blaine County | 4238.92 | 4226.18 | 12.74 | 7009 | 1.7 | 12101 | 25247 | 30616 |
| 4 | Broadwater County | 1238.94 | 1191.35 | 47.59 | 4385 | 3.7 | 16237 | 32689 | 36524 |
| 5 | Carbon County | 2062.19 | 2047.99 | 14.2 | 9552 | 4.7 | 17204 | 32139 | 38405 |
| 6 | Carter County | 3348.29 | 3339.57 | 8.73 | 1360 | 0.4 | 13280 | 26313 | 32262 |
| 7 | Cascade County | 2711.65 | 2697.9 | 13.75 | 80357 | 29.8 | 17566 | 32971 | 39949 |
| 8 | Chouteau County | 3997 | 3973.24 | 23.76 | 5970 | 1.5 | 14851 | 29150 | 32399 |
| 9 | Custer County | 3793.22 | 3783.13 | 10.09 | 11696 | 3.1 | 15876 | 30000 | 38779 |
| 10 | Daniels County | 1426.52 | 1426.09 | 0.43 | 2017 | 1.4 | 16055 | 27306 | 35722 |
| 11 | Dawson County | 2383.13 | 2373.14 | 9.99 | 9059 | 3.8 | 15368 | 31393 | 38455 |
| 12 | Deer Lodge County | 741.16 | 736.98 | 4.19 | 9417 | 12.8 | 15580 | 26305 | 36158 |
| 13 | Fallon County | 1623.02 | 1620.33 | 2.69 | 2837 | 1.8 | 16014 | 29944 | 38636 |
| 14 | Fergus County | 4350.36 | 4339.17 | 11.2 | 11893 | 2.7 | 15808 | 30409 | 36609 |
| 15 | Flathead County | 5256.45 | 5098.34 | 158.11 | 74471 | 14.6 | 18112 | 34466 | 40702 |
| 16 | Gallatin County | 2631.84 | 2605.84 | 26 | 67831 | 26 | 19074 | 38120 | 46639 |
| 17 | Garfield County | 4847.54 | 4668.06 | 179.48 | 1279 | 0.3 | 13930 | 25917 | 31111 |
| 18 | Glacier County | 3037.11 | 2994.72 | 42.39 | 13247 | 4.4 | 11597 | 27921 | 31193 |
| 19 | Golden Valley County | 1176.4 | 1175.3 | 1.1 | 1042 | 0.9 | 13573 | 27308 | 35000 |
| 20 | Granite County | 1733.11 | 1727.44 | 5.67 | 2830 | 1.6 | 16636 | 27813 | 33485 |
| 21 | Hill County | 2916.05 | 2896.36 | 19.69 | 16673 | 5.8 | 14935 | 30781 | 38179 |
| 22 | Jefferson County | 1658.83 | 1656.64 | 2.19 | 10049 | 6.1 | 18250 | 41506 | 48912 |
| 23 | Judith Basin County | 1870.71 | 1869.85 | 0.86 | 2329 | 1.2 | 14291 | 29241 | 34243 |
| 24 | Lake County | 1653.72 | 1493.77 | 159.95 | 26507 | 17.7 | 15173 | 28740 | 34033 |
| 25 | Lewis and Clark County | 3497.56 | 3460.96 | 36.6 | 55716 | 16.1 | 18763 | 37360 | 46766 |
| 26 | Liberty County | 1447.19 | 1429.76 | 17.44 | 2158 | 1.5 | 14882 | 30284 | 37361 |
| 27 | Lincoln County | 3675.11 | 3612.67 | 62.44 | 18837 | 5.2 | 13923 | 26754 | 31784 |
| 28 | McCone County | 2682.77 | 2642.53 | 40.25 | 1977 | 0.7 | 15162 | 29718 | 35887 |
| 29 | Madison County | 3602.85 | 3586.54 | 16.31 | 6851 | 1.9 | 16944 | 30233 | 35536 |
| 30 | Meagher County | 2394.83 | 2391.82 | 3.02 | 1932 | 0.8 | 15019 | 29375 | 33879 |
| 31 | Mineral County | 1223.38 | 1219.82 | 3.56 | 3884 | 3.2 | 15166 | 27143 | 32096 |
| 32 | Missoula County | 2618.34 | 2597.97 | 20.37 | 95802 | 36.9 | 17808 | 34454 | 44865 |
| 33 | Musselshell County | 1870.91 | 1867.15 | 3.76 | 4497 | 2.4 | 15389 | 25527 | 32298 |
| 34 | Park County | 2813.59 | 2802.41 | 11.18 | 15694 | 5.6 | 17704 | 31739 | 40561 |
| 35 | Petroleum County | 1674.01 | 1653.9 | 20.11 | 493 | 0.3 | 15986 | 24107 | 32667 |
| 36 | Phillips County | 5212.17 | 5139.57 | 72.6 | 4601 | 0.9 | 15058 | 28702 | 37529 |
| 37 | Pondera County | 1639.85 | 1624.7 | 15.16 | 6424 | 4 | 14276 | 30464 | 36484 |
| 38 | Powder River County | 3297.94 | 3297.18 | 0.76 | 1858 | 0.6 | 15351 | 28398 | 34671 |
| 39 | Powell County | 2332.68 | 2325.94 | 6.74 | 7180 | 3.1 | 13816 | 30625 | 35836 |
| 40 | Prairie County | 1742.56 | 1736.55 | 6 | 1199 | 0.7 | 14422 | 25451 | 32292 |
| 41 | Ravalli County | 2400.32 | 2394.21 | 6.11 | 36070 | 15.1 | 17935 | 31992 | 38397 |
| 42 | Richland County | 2103.02 | 2084.09 | 18.93 | 9667 | 4.6 | 16006 | 32110 | 39348 |
| 43 | Roosevelt County | 2369.65 | 2355.6 | 14.05 | 10620 | 4.5 | 11347 | 24834 | 27833 |
| 44 | Rosebud County | 5026.94 | 5012.37 | 14.57 | 9383 | 1.9 | 15032 | 35898 | 41631 |
| 45 | Sanders County | 2790.03 | 2762.17 | 27.86 | 10227 | 3.7 | 14593 | 26852 | 31340 |
| 46 | Sheridan County | 1706.3 | 1676.58 | 29.73 | 4105 | 2.4 | 16038 | 29518 | 35345 |
| 47 | Silver Bow County | 718.97 | 718.31 | 0.66 | 34606 | 48.2 | 17009 | 30402 | 40018 |
| 48 | Stillwater County | 1804.61 | 1795.09 | 9.52 | 8195 | 4.6 | 18468 | 39205 | 45238 |
| 49 | Sweet Grass County | 1862 | 1855.08 | 6.92 | 3609 | 1.9 | 17880 | 32422 | 38750 |
| 50 | Teton County | 2292.58 | 2272.61 | 19.97 | 6445 | 2.8 | 14635 | 30197 | 36662 |
| 51 | Toole County | 1945.86 | 1910.95 | 34.91 | 5267 | 2.8 | 14731 | 30169 | 39600 |
| 52 | Treasure County | 984.11 | 978.86 | 5.24 | 861 | 0.9 | 14392 | 29830 | 34219 |
| 53 | Valley County | 5061.98 | 4921 | 140.98 | 7675 | 1.6 | 16246 | 30979 | 39044 |
| 54 | Wheatland County | 1428.29 | 1423.09 | 5.19 | 2259 | 1.6 | 11954 | 24492 | 32500 |
| 55 | Wibaux County | 890.09 | 889.31 | 0.78 | 1068 | 1.2 | 16121 | 28224 | 34265 |
| 56 | Yellowstone County | 2649.05 | 2635.15 | 13.9 | 129352 | 49.1 | 19303 | 36727 | 45277 |