Rhestr prifddinasoedd yr Unol Daleithiau
Mae Washington, D.C., wedi bod yn brifddinas Unol Daleithiau America ers 1800. Mae Cyngres yr Unol Daleithiau wedi cyfarfod wyth gwaith hyd yma mewn dinasoedd eraill, felly fe'u hystyrir yn brifddinasoedd hanesyddol. Ceir hefyd 50 o brifddinasoedd y taleithiau a phum prif rhanbarth, gyda'u prifddinasoedd eu hunain.
| Talaith | Talf. | Dyddiad creu'r dalaith | Prifddinas | Dyddiad sefydlu'r brifddinas |
Arwynebedd (mi²) | Dinas mwyaf poblog | Poblogaeth y fwrdeistref | Poblogaeth y metropolis |
|---|---|---|---|---|---|---|---|---|
 Alabama |
AL | 1819 | Montgomery | 1846 | 155.4 | Na | 205,764 | 374,536 |
 Alaska |
AK | 1959 | Juneau | 1906 | 2716.7 | Na | 31,275 | |
 Arizona |
AZ | 1912 | Phoenix | 1889 | 474.9 | Ie | 1,445,632 | 4,192,887 |
 Arkansas |
AR | 1836 | Little Rock | 1821 | 116.2 | Ie | 193,524 | 877,091 |
 Califfornia |
CA | 1850 | Sacramento | 1854 | 97.2 | Na | 466,488 | 2,527,123 |
 Colorado |
CO | 1876 | Denver | 1867 | 153.4 | Ie | 600,158 | 2,552,195 |
 Connecticut |
CT | 1788 | Hartford | 1875 | 17.3 | Na | 124,512 | 1,212,381 |
 De Carolina |
SC | 1788 | Columbia | 1786 | 125.2 | Ie | 129,272 | 805,106 |
 De Dakota |
SD | 1889 | Pierre | 1889 | 13.0 | Na | 13,646 | |
 Delaware |
DE | 1787 | Dover | 1777 | 22.4 | Na | 32,135 | |
 Efrog Newydd |
NY | 1788 | Albany | 1797 | 21.4 | Na | 97,856 | 857,592 |
 Florida |
FL | 1845 | Tallahassee | 1824 | 95.7 | Na | 181,412 | 367,413 |
 Georgia |
GA | 1788 | Atlanta | 1868 | 131.7 | Ie | 420,003 | 5,268,860 |
 Gogledd Carolina |
NC | 1789 | Raleigh | 1794 | 114.6 | Na | 403,892 | 1,130,490 |
 Gogledd Dakota |
ND | 1889 | Bismarck | 1883 | 26.9 | Na | 61,272 | 108,779 |
 Gorllewin Virginia |
WV | 1863 | Charleston | 1885 | 31.6 | Ie | 51,400 | 304,214 |
 Hawaii |
HI | 1959 | Honolulu | 1845 | 85.7 | Ie | 337,256 | 953,207 |
 Idaho |
ID | 1890 | Boise | 1865 | 63.8 | Ie | 205,671 | 616,561 |
 Illinois |
IL | 1818 | Springfield | 1837 | 54.0 | Na | 116,250 | 208,182 |
 Indiana |
IN | 1816 | Indianapolis | 1825 | 361.5 | Ie | 829,718 | 1,756,221 |
 Iowa |
IA | 1846 | Des Moines | 1857 | 75.8 | Ie | 203,433 | 562,906 |
 Kansas |
KS | 1861 | Topeka | 1856 | 56.0 | Na | 127,473 | 230,824 |
 Kentucky |
KY | 1792 | Frankfort | 1792 | 14.7 | Na | 25,527 | 70,758 |
 Louisiana |
LA | 1812 | Baton Rouge | 1880 | 76.8 | Na | 229,553 | 802,484 |
 Maine |
ME | 1820 | Augusta | 1832 | 55.4 | Na | 19,136 | 117,114 |
 Maryland |
MD | 1788 | Annapolis | 1694 | 6.73 | Na | 38,394 | |
 Massachusetts |
MA | 1788 | Boston | 1630 | 48.4 | Ie | 617,594 | 4,522,858 |
 Mecsico Newydd |
NM | 1912 | Santa Fe | 1610 | 37.3 | Na | 75,764 | 183,732 |
 Michigan |
MI | 1837 | Lansing | 1847 | 35.0 | Na | 114,297 | 464,036 |
 Minnesota |
MN | 1858 | Saint Paul | 1849 | 52.8 | Na | 285,068 | 3,502,891 |
 Mississippi |
MS | 1817 | Jackson | 1821 | 104.9 | Ie | 173,514 | 539,057 |
 Missouri |
MO | 1821 | Dinas Jefferson | 1826 | 27.3 | Na | 43,079 | 149,807 |
 Montana |
MT | 1889 | Helena | 1875 | 14.0 | Na | 28,190 | 74,801 |
 Nebraska |
NE | 1867 | Lincoln | 1867 | 74.6 | Na | 258,379 | 302,157 |
 Nevada |
NV | 1864 | Carson City | 1861 | 143.4 | Na | 55,274 | |
 New Hampshire |
NH | 1788 | Concord | 1808 | 64.3 | Na | 42,695 | |
 New Jersey |
NJ | 1787 | Trenton | 1784 | 7.66 | Na | 84,913 | 366,513 |
 Ohio |
OH | 1803 | Columbus | 1816 | 210.3 | Ie | 787,033 | 1,836,536 |
 Oklahoma |
OK | 1907 | Dinas Oklahoma | 1910 | 607.0 | Ie | 580,000 | 1,252,987 |
 Oregon |
OR | 1859 | Salem | 1855 | 45.7 | Na | 154,637 | 390,738 |
 Pennsylvania |
PA | 1787 | Harrisburg | 1812 | 8.11 | Na | 49,528 | 647,390 |
 Rhode Island |
RI | 1790 | Providence | 1900 | 18.5 | Ie | 178,042 | 1,630,956 |
 Tennessee |
TN | 1796 | Nashville | 1826 | 473.3 | Na | 635,710 | 1,582,264 |
 Texas |
TX | 1845 | Austin | 1839 | 251.5 | Na | 790,390 | 1,716,291 |
 Utah |
UT | 1896 | Salt Lake City | 1858 | 109.1 | Ie | 186,440 | 1,124,197 |
 Vermont |
VT | 1791 | Montpelier | 1805 | 10.2 | Na | 7,855 | |
 Virginia |
VA | 1788 | Richmond | 1780 | 60.1 | Na | 204,214 | 1,231,675 |
 Washington |
WA | 1889 | Olympia | 1853 | 16.7 | Na | 46,478 | 234,670 |
 Wisconsin |
WI | 1848 | Madison | 1838 | 68.7 | Na | 233,209 | 561,505 |
 Wyoming |
WY | 1890 | Cheyenne | 1869 | 21.1 | Ie | 59,466 | 91,738 |