USA time zones by state

There are 9 standard time zones in the USA officially defined by federal law. The entire 50 states and the District of Columbia are situated in 6 main time zones.

  • UTC-05:00 Eastern Time Zone, the most populous in the USA, includes the District of Columbia with the capital city of Washington and 23 states wholly or partially located within this zone. De facto the Eastern Time often is used as the USA official time.
  • UTC-06:00 Central Time Zone, the biggest one by area, encompasses 20 states, but only 10 of them are entirely located within zone's boundaries, all remaining states have some exceptions.
  • UTC-07:00 Mountain Time Zone includes 14 states, only 5 of them are wholly located in this zone, all others use the Mountain Time only in some parts of their territories.
  • UTC-08:00 Pacific Time Zone covers 5 states - the entire states of California and Washington, most of Nevada and Oregon with some exceptions, and some northern parts of Idaho.
  • UTC-09:00 Alaska Time Zone, as clearly observed in its name, includes the most of the territory of Alaska.
  • UTC-10:00 Hawaii-Aleutian Time Zone covers Hawaii and western part of the Aleutian Islands belonging to Alaska.

Other 3 time zones are used by insular areas of the USA outside of the states.

  • UTC-04:00 Atlantic Time Zone comprises the Puerto Rico and the United States Virgin Islands in the Caribbean.
  • UTC-11:00 Samoa Time Zone is used in the American Samoa islands in the South Pacific.
  • UTC+10:00 Chamorro Time Zone comprises the Guam and the Northern Mariana Islands, located in the northwestern part of the Pacific Ocean.

Nowadays, 48 of the US states use Daylight Saving Time (DST) in the summer period, the exceptions are Arizona, where most of territories do not change to DST (since 1967), and the entire Hawaii, which has never observed the summer time. All insular territories like Puerto Rico, US Virgin Islands, American Samoa, Guam and the Northern Mariana Islands have no DST.

Daylight Saving Time (DST) in 2015 - starts on Sunday 08 March 2015, 02:00 local time (clock by 1 hour ahead) - ends on Sunday 01 November 2015, 02:00 local time (clock by 1 hour back)

Alphabetical list of USA states with their standard time zones and DST
A C D F G H I K L M N O P R S T U V W
State with state codeCapital city or example locationUTC time offsetDST
A
Alabama (AL) Montgomery -06:00 -05:00
Alaska (AK), most of Juneau -09:00 -08:00
Alaska (AK), small part Adak, Unalaska -10:00 -09:00
Arizona (AZ), most of Phoenix -07:00 none
Arizona (AZ), small part Window Rock -07:00 -06:00
Arkansas (AR) Little Rock -06:00 -05:00
C
California (CA) Sacramento -08:00 -07:00
Colorado (CO) Denver -07:00 -06:00
Connecticut (CT) Hartford -05:00 -04:00
D
Delaware (DE) Dover -05:00 -04:00
District of Columbia (DC) Washington, D.C. -05:00 -04:00
F
Florida (FL), most of Tallahassee -05:00 -04:00
Florida (FL), small part Pensacola -06:00 -05:00
G
Georgia (GA) Atlanta -05:00 -04:00
H
Hawaii (HI) Honolulu -10:00 none
I
Idaho (ID), most of Boise -07:00 -06:00
Idaho (ID), small part Coeur d'Alene -08:00 -07:00
Illinois (IL) Springfield -06:00 -05:00
Indiana (IN), most of Indianapolis -05:00 -04:00
Indiana (IN), small part Gary, Evansville -06:00 -05:00
Iowa (IA) Des Moines -06:00 -05:00
K
Kansas (KS), most of Topeka -06:00 -05:00
Kansas (KS), small part Goodland -07:00 -06:00
Kentucky (KY), most of Frankfort -05:00 -04:00
Kentucky (KY), small part Bowling Green -06:00 -05:00
L
Louisiana (LA) Baton Rouge -06:00 -05:00
M
Maine (ME) Augusta -05:00 -04:00
Maryland (MD) Annapolis -05:00 -04:00
Massachusetts (MA) Boston -05:00 -04:00
Michigan (MI), most of Lansing -05:00 -04:00
Michigan (MI), small part Iron Mountain -06:00 -05:00
Minnesota (MN) St. Paul -06:00 -05:00
Mississippi (MS) Jackson -06:00 -05:00
Missouri (MO) Jefferson City -06:00 -05:00
Montana (MT) Helena -07:00 -06:00
N
Nebraska (NE), most of Lincoln -06:00 -05:00
Nebraska (NE), small part Scottsbluff, Chadron -07:00 -06:00
Nevada (NV) Carson City -08:00 -07:00
New Hampshire (NH) Concord -05:00 -04:00
New Jersey (NJ) Trenton -05:00 -04:00
New Mexico (NM) Santa Fe -07:00 -06:00
New York (NY) Albany -05:00 -04:00
North Carolina (NC) Raleigh -05:00 -04:00
North Dakota (ND), most of Bismarck -06:00 -05:00
North Dakota (ND), small part Dickinson -07:00 -06:00
O
Ohio (OH) Columbus -05:00 -04:00
Oklahoma (OK) Oklahoma City -06:00 -05:00
Oregon (OR), most of Salem -08:00 -07:00
Oregon (OR), small part Ontario -07:00 -06:00
P
Pennsylvania (PE) Harrisburg -05:00 -04:00
R
Rhode Island (RI) Providence -05:00 -04:00
S
South Carolina (SC) Columbia -05:00 -04:00
South Dakota (SD), most of Pierre -06:00 -05:00
South Dakota (SD), small part Rapid City -07:00 -06:00
T
Tennessee (TN), most of Nashville -06:00 -05:00
Tennessee (TN), small part Knoxville, Chattanooga -05:00 -04:00
Texas (TX), most of Austin -06:00 -05:00
Texas (TX), small part El Paso -07:00 -06:00
U
Utah (UT) Salt Lake City -07:00 -06:00
V
Vermont (VT) Montpelier -05:00 -04:00
Virginia (VA) Richmond -05:00 -04:00
W
Washington (WA) Olympia -08:00 -07:00
West Virginia (WV) Charleston -05:00 -04:00
Wisconsin (WI) Madison -06:00 -05:00
Wyoming (WY) Cheyenne -07:00 -06:00

Some overseas territories governed by the USA in the Pacific and the Caribbean, so called United States Minor Outlying Islands have the following standard time zones not specified in the federal law, and these areas don't change to DST.

  • UTC+12 - Wake Island,
  • UTC−12 - Baker Island and Howland Island,
  • UTC−11 - Jarvis Island, Midway Atoll, Palmyra Atoll, and Kingman Reef,
  • UTC−10 - Johnston Atoll,
  • UTC−05 - Navassa Island.