Range.—Canada to northern South America.
Breeding range.—The Tennessee warbler breeds north to southwestern Yukon (Burwash Landing and the Dezadiash River); southern Mackenzie (Mackenzie River below Fort Wrigley, lower Grandin River, and Pike’s Portage); northeastern Manitoba (Churchill and York Factory); central Quebec (Fort George, Lake Mistassini, and Mingan); and possibly southern Labrador (Hawkes Bay). East to southeastern Labrador (Hawkes Bay); central Newfoundland (Lamond and Gaff Topsail). South to central Newfoundland (Gaff Topsail); Nova Scotia (Wolfville); southern New Brunswick (Grand Manan); northern and central western Maine (Mount Katahdin, Livermore, and Lake Umbagog); north-central New Hampshire (Mount Washington); south-central Vermont (Rutland); possibly northwestern Massachusetts (Hancock); southern New York (Slide Mountain); southern Ontario (Ottawa, North Bay, and Biscotasing; probably occasionally farther south); west-central Michigan (Duck Lane); probably northern Wisconsin (Plum Lake); northern Minnesota (Tower, Cass Lake, and Warren); southwestern Manitoba (Margaret and Aweme); central Saskatchewan (Emma Lake; has been found in the breeding season at Indian Head, Old Wives Creek, and Maple Creek); southern Alberta (Flagstaff, Red Deer, and Banff); and south-central British Columbia (150 Mile House and Kimquit). West to western British Columbia (Kimquit, Hazelton, Telegraph Creek, and Atlin); and southwestern Yukon (Dezadiash River and Burwash Landing).
Winter range.—In winter the Tennessee warbler is found north to central Guatemala (Volcán de Santa María, Cobán, and Gualán). East to eastern Guatemala (Gualán); northeastern El Salvador (Mount Cacaguatique); eastern Nicaragua (Río Escondido); eastern Costa Rica (Puerto Limón); eastern Panamá (Barro Colorado and Permé); northern Colombia (Santa Marta region); and northern Venezuela (Caracas). South to northern Venezuela (Caracas and Mérida); and northwestern Colombia (Concordia). West to western Colombia (Concordia and Antioquia); Panamá (Paracaté); Costa Rica (El General and Liberia); El Salvador (Puerto de Triunfo); and Guatemala (Tecpán and Volcán de Santa María). It has also been found to the first of January (possibly delayed migration) at Knoxville (1936) and at Nashville (1935), Tenn.; and one wintered (1934-35) in Cameron County, Tex.
Migration.—Late dates of departure from the winter home are: Colombia—Miraflores, April 19. Costa Rica—San Isidro del General, April 30. El Salvador—San Salvador, April 25. Guatemala—Livingston, April 8. Chiapas—Tixtla Gutiérrez, May 8. Tamaulipas—Gómez Farías, April 27.
Early dates of spring arrival are: Cuba—Habana, April 8. Florida—Sandy Key, April 13. Georgia—Athens, April 13. District of Columbia—Washington, May 2. West Virginia—French Creek, April 20. Pennsylvania—McKeesport, April 27. New York—Corning, May 3. Massachusetts—Northampton, May 8. Maine—Waterville, May 11. New Brunswick—Petitcodiac, May 19. Quebec—Quebec, May 19. Louisiana—Avery Island, April 6. Arkansas—Winslow, April 8. Tennessee—Memphis, April 9. Kentucky—Bowling Green, April 19. Indiana—Bloomington, April 12. Ohio—Columbus, April 25. Michigan—Ann Arbor, April 21. Ontario—Ottawa, May 12. Missouri—Columbia, April 22. Iowa—Sigourney, April 25. Wisconsin—St. Croix Falls, April 25. Minnesota—Clarissa, April 30. Kansas—Winfield, April 19. Nebraska—Red Cloud, April 18. South Dakota—Vermillion, May 1. North Dakota—Fargo, May 1. Manitoba—Margaret, May 3. Colorado—Estes Park, May 14. Wyoming—Torrington, May 12. Montana—Great Falls, May 9. Alberta—Belvedere, May 1. British Columbia—Carpenter Mountain, Cariboo, May 15; Atlin, May 26.
Late dates of spring departure of transients are: Cuba—Habana, May 5. Florida—Fort Myers, May 15. Alabama—Melville, May 3. Georgia—Athens, May 7. North Carolina—Chapel Hill, May 3. Virginia—Falls Church, June 3. District of Columbia—Washington, June 3. Pennsylvania—Warren, May 30. New York—Rochester, June 6. Massachusetts—Beverly, June 3. Vermont—Wells River, June 5. Louisiana—Shreveport, May 15. Mississippi—Oxford, May 15. Arkansas—Delight, May 20. Tennessee—Nashville, May 21. Illinois—Lake Forest, June 3. Ohio—Toledo, June 5. Michigan—Houghton, June 7. Ontario—Toronto, June 7. Missouri—Columbia, May 31. Iowa—Sioux City, June 6. Wisconsin—Racine, June 4. Minnesota—St. Paul, June 1. Kansas—Lawrence, May 24. Nebraska—Omaha, May 28. South Dakota—Faulkton, June 5.
Late dates of fall departure are: British Columbia—Atlin, July 26; 16-mile Lake, Cariboo, August 28. Alberta—Glenevis, September 13. Montana—Fortine, September 11. Wyoming—Laramie, October 5. Saskatchewan—Wiseton, September 29. Manitoba—Aweme, October 3. North Dakota—Fargo, October 8. South Dakota—Arlington, October 8. Nebraska—Lincoln, October 14. Kansas—Lawrence, October 22. Oklahoma—Fort Sill, October 19. Minnesota—Hutchinson, October 11. Wisconsin—Madison, October 19. Iowa—National, October 17. Missouri—St. Louis, October 19. Michigan—Ann Arbor, October 30. Ontario—Port Dover, October 10. Ohio—Columbus, October 31. Illinois—Evanston, October 28. Tennessee—Nashville, October 23. Arkansas—Jonesboro, October 19. Louisiana—New Orleans, November 8. Mississippi—Gulfport, November 12. Quebec—Montreal, September 28. Vermont—Wells River, September 29. Massachusetts—Harvard, October 1. New York—Rhinebeck, October 14. Pennsylvania—Beaver, October 26. District of Columbia—Washington, October 22. North Carolina—Mount Mitchell, October 1. Georgia—Dalton, October 30, Alabama—Birmingham, October 25. Florida—Pensacola, November 4. Cuba—Habana, November 10.
Early dates of fall arrival are: Wyoming—Laramie, August 28. South Dakota—Lennox, August 30. Kansas—Topeka, August 29. Wisconsin—Delavan, August 19. Illinois—Glen Ellyn, August 17. Missouri—Monteer, August 20. Ohio—Toledo, August 19. Tennessee—Knoxville, September 15. Arkansas—Hot Springs, September 19. Louisiana—Monroe, September 14. Mississippi—Gulfport, September 5. Vermont—Woodstock, August 22. Massachusetts—Lexington, August 11. Pennsylvania—Jeffersonville, August 27. District of Columbia—Washington, August 31. Virginia—Salem, August 23. North Carolina—Blowing Rock, September 1. Georgia—Atlanta, September 9. Alabama—Leighton, September 17. Florida—Fort Myers, September 20. Cuba—Habana, October 13. Guatemala—Huehuetenango, September 11. Nicaragua—Río Escondido, October 24. Costa Rica—San José, September 17. Panamá—New Culebra, October 24. Colombia—Santa Marta Region, October 14.
Casual records.—In 1898 an adult male of this species was found dead at Narssag, Greenland. In Bermuda one was seen on March 2, 1914, and it remained about six weeks.
Egg dates.—Alberta: 6 records, June 1 to 16.