Maryland
As of the census of 2000, there were 5296486 people in the state, organized into 1980859 households, and 1359318 families living in the state. The population density was 541.9 people per square mile (209.23/km˛), it is fifth most densely populated state in United States. There were 2145283 housing units at an average density of 219.5 per square mile (84.75/km˛). It has an average household size was 2.61 persons, and the average family size was 3.13 persons. In the Maryland, 25.6% of the population was under the age of 18, 8.5% were 18 to 24, 31.4% were 25 to 44, 23.1% were 45 to 64, and 11.3% who were 65 or older. For every 100 females there were 93.4 males. For every 100 females age 18 and over, there were 89.8 males. The median age was 36 years, the median age of male residents at 34.9 and the median age of female residents at 37. Its population in July 2008 was estimated to be about 5296486, The racial makeup of the state was 64.03% White, 27.89% Black or African American, 0.29% American Indian, 3.98% Asian, 0.04% Native Hawaiian, 1.96% from two or more races and 1.8% Other races.
The median income for a household in the state was $52868, it is the third highest state by median household income in the U.S. state of America. The median income for a family in the state was $61876, making it the third highest state by median family income in United States. The per capita income for the state was $25614, making it the fourth wealthiest state by per capita income among the United States. The median income was $29262, Males have a median income of $34682 versus $24735 for females. The Bureau of Economic Analysis estimates that the total GDP in 2008 was $273.3 billion, it is 15th wealthiest state by gross domestic product in United States. Per capita personal income in 2008 was $39205.
In 2000, 1475484 pupils and students, of which 49.47% are male and 50.53% are female, 27.86% of the total population, are in the education system. Of which, percentage of enrollment student are in, 6.51% nursery or pri school, 5.11% kindergarten, 43.5% elementary school, 20.85% high school and 24.02% 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 | Allegany County | 429.82 | 425.42 | 4.4 | 74930 | 176.1 | 16780 | 30821 | 39886 |
| 2 | Anne Arundel County | 587.9 | 415.94 | 171.96 | 489656 | 1177.2 | 27578 | 61768 | 69019 |
| 3 | Baltimore County | 682.03 | 598.59 | 83.44 | 754292 | 1260.1 | 26167 | 50667 | 59998 |
| 4 | Calvert County | 345.09 | 215.17 | 129.91 | 74563 | 346.5 | 25410 | 65945 | 71545 |
| 5 | Caroline County | 326.06 | 320.14 | 5.92 | 29772 | 93 | 17275 | 38832 | 44825 |
| 6 | Carroll County | 452.4 | 449.13 | 3.27 | 150897 | 336 | 23829 | 60021 | 66430 |
| 7 | Cecil County | 417.88 | 348.13 | 69.75 | 85951 | 246.9 | 21384 | 50510 | 56469 |
| 8 | Charles County | 643.22 | 461 | 182.22 | 120546 | 261.5 | 24285 | 62199 | 67602 |
| 9 | Dorchester County | 982.92 | 557.54 | 425.38 | 30674 | 55 | 18929 | 34077 | 41917 |
| 10 | Frederick County | 667.34 | 662.88 | 4.46 | 195277 | 294.6 | 25404 | 60276 | 67879 |
| 11 | Garrett County | 655.9 | 647.96 | 7.94 | 29846 | 46.1 | 16219 | 32238 | 37811 |
| 12 | Harford County | 526.72 | 440.35 | 86.37 | 218590 | 496.4 | 24232 | 57234 | 63868 |
| 13 | Howard County | 253.55 | 252.04 | 1.51 | 247842 | 983.3 | 32402 | 74167 | 85422 |
| 14 | Kent County | 414.31 | 279.43 | 134.87 | 19197 | 68.7 | 21573 | 39869 | 46708 |
| 15 | Montgomery County | 507.14 | 495.52 | 11.63 | 873341 | 1762.5 | 35684 | 71551 | 84035 |
| 16 | Prince George's County | 498.45 | 485.43 | 13.01 | 801515 | 1651.1 | 23360 | 55256 | 62467 |
| 17 | Queen Anne's County | 509.79 | 372.21 | 137.58 | 40563 | 109 | 26364 | 57037 | 63713 |
| 18 | St. Mary's County | 764.5 | 361.25 | 403.25 | 86211 | 238.6 | 22662 | 54706 | 61397 |
| 19 | Somerset County | 610.78 | 327.21 | 283.56 | 24747 | 75.6 | 15965 | 29903 | 37643 |
| 20 | Talbot County | 476.77 | 269.14 | 207.64 | 33812 | 125.6 | 28164 | 43532 | 53214 |
| 21 | Washington County | 467.55 | 458.14 | 9.41 | 131923 | 288 | 20062 | 40617 | 48962 |
| 22 | Wicomico County | 399.79 | 377.17 | 22.62 | 84644 | 224.4 | 19171 | 39035 | 47129 |
| 23 | Worcester County | 694.73 | 473.24 | 221.49 | 46543 | 98.4 | 22505 | 40650 | 47293 |
| 24 | Baltimore city | 92.08 | 80.8 | 11.27 | 651154 | 8058.4 | 16978 | 30078 | 35438 |