[Alabama]
- Southern Longleaf Pine, Pinus palustris
[Alaska]
- Sitka spruce, Picea sitchensis
[Arizona]
- Palo verde, Cercidium
[Arkansas]
- [Pine], Pinus
[California]
- Coast redwood, Sequoia sempervirens
- [Giant redwood], Sequoia gigantea
[Colorado]
- Colorado [Blue Spruce], Picea pungens
[Connecticut]
- [White Oak], Quercus alba
[Delaware]
- [American Holly], Ilex opaca
[Florida]
- Sabal [Palmetto], Sabal palmetto
[Georgia]
- Live [Oak], Quercus virginiana
[Hawaii]
- Kukui - Candlenut, Aleurites moluccana
[Idaho]
- Western White Pine, Pinus monticola
[Illinois]
- [White Oak], Quercus alba
[Indiana]
- [Tulip tree], liriodendron tulipifera
[Iowa]
- [Oak], Quercus
[Kansas]
- [Cottonwood], Populus deltoides
[Kentucky]
- [Tulip Tree], Liriodendron tulipifera
[Louisiana]
- Bald [Cypress], Taxodium distichum
[Maine]
- [White Pine], Pinus strobus
[Maryland]
- [White Oak], Quercus alba
[Massachusetts]
- American [Elm], Ulmus americana
[Michigan]
- [White pine], Pinus strobus
[Minnesota]
- [Red Pine], Pinus resinosa
[Mississippi]
- [Magnolia], Magnolia grandiflora
[Missouri]
- Flowering [Dogwood], Cornus florida
[Montana]
- [Ponderosa Pine], Pinus ponderosa
[Nebraska]
- Eastern [Cottonwood], Populus deltoides
[Nevada]
- Single Leaf [Pinyon], Pinus monophylla
- [Bristlecone Pine], Pinus aristata
[NewHampshire]
- [White Birch], Betula papyrifera
[NewJersey]
- [Red Oak], Quercus rubra (Q. borealis)
[NewMexico]
- Pinyon, Pinus edulis
[NewYork]
- [Sugar Maple], Acer saccharum
[NorthCarolina]
- [Pine], Pinus
[NorthDakota]
- American [Elm], Ulmus americana
[Ohio]
- [Buckeye], Aesculus glabra
[Oklahoma]
- Redbud ,Cercis canadensis
[Oregon]
- [Douglas Fir], Pseudotsuga menziesii
[Pennsylvania]
- Eastern [Hemlock], Tsuga canadensis
[RhodeIsland]
- Red [Maple], Acer rubrum
[SouthCarolina]
- Sabal [Palmetto], Sabal palmetto
[SouthDakota]
- [Black Hills] [Spruce], Picea glauca
[Tennessee]
- [Tulip Tree], Liriodendron tulipifera
[Texas]
- [Pecan], Carya illinoensis
[Utah]
- [Blue Spruce], Picea pungens
[Vermont]
- [Sugar Maple], Acer saccharum
[Virginia]
- [Dogwood], Cornus florida
[Washington]
- Western [Hemlock], Tsuga heterophylla
[WestVirginia]
- [Sugar Maple], Acer saccharum
[Wisconsin]
- [Sugar Maple], Acer saccharum
[Wyoming]
- [Cottonwood], Populus sargentii

For more US State Stuff...
- [US State Birds]
  - [US State Capitals]
    - [US State Flowers]
      - [US State Nicknames]
        [US State Songs]
        US State Trees

US State Trees (thing)