The name Olga has been used for two tropical cyclone in the Atlantic Basin

Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

 and ten tropical cyclones in the Pacific Ocean

Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

.

Olga is used on the six-year lists in the Atlantic, where it replaced Opal

Hurricane Opal

Hurricane Opal was a Category 4 hurricane that formed in the Gulf of Mexico in September 1995.Opal was the ninth hurricane and the strongest of the abnormally active 1995 Atlantic hurricane season...

:

• 2001's Hurricane Olga
  Hurricane Olga (2001)
  Hurricane Olga was a late season Category 1 Atlantic hurricane that formed during the 2001 Atlantic hurricane season. The fifteenth named storm, ninth and final hurricane of the 2001 season, Olga formed as a subtropical cyclone on November 24. After acquiring tropical characteristics later that...
  
   - late season storm that had no effect on land.
• 2007's Tropical Storm Olga
  Tropical Storm Olga (2007)
  Tropical Storm Olga was the fifteenth named storm of the 2007 Atlantic hurricane season. In the second week of December, after the official end of the hurricane season, a low developed east of the northernmost Lesser Antilles. It slowly acquired tropical characteristics, and late on December 10,...
  
   - rare December storm that killed 40 people, mostly in the Dominican Republic.

Olga has been used for ten tropical cyclones in the Western Pacific:

• 1948's Tropical Storm Olga (T4827)
• 1954's Typhoon Olga (T5417)
• 1958's Typhoon Olga (T5830)
• 1961's Typhoon Olga (T6119, 51W)
• 1964's Tropical Storm Olga (22W, Japan Meteorological Agency
  Japan Meteorological Agency
  The or JMA, is the Japanese government's weather service. Charged with gathering and reporting weather data and forecasts in Japan, it is a semi-autonomous part of the Ministry of Land, Infrastructure and Transport...
  
   analyzed it as a tropical depression, not as a tropical storm.)
• 1966's Tropical Storm Olga (T6634, 37W)
• 1970's Super Typhoon Olga (T7002, 02W) - affected Japan
  Japan
  Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
  
  .
• 1972's Typhoon Olga (T7226, 28W) - caused minimal damage in the Marshall Islands and the Northern Marianas Islands.
• 1976's Typhoon Olga (T7605, 05W, Didang) - affected the Philippines
  Philippines
  The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...
  
   and Japan.
• 1999's Typhoon Olga (T9907, 11W, Ising) - killed 64 in North and South Korea.

The 1999 Pacific Typhoon Season was the last typhoon season to have only English names.

Olga has been used for at least three tropical cyclones in the Southern Hemisphere

Southern Hemisphere

The Southern Hemisphere is the part of Earth that lies south of the equator. The word hemisphere literally means 'half ball' or "half sphere"...

:

• 1981's Tropical Cyclone Olga
• 2000's Tropical Cyclone Olga
• 2010's Tropical Cyclone Olga - affected the Solomon Islands as a Tropical Depression