Leamington has a large H. J. Heinz Company factory and is known as the "Tomato Capital of Canada", with 4 km² of this crop in the vicinity. It also lays claim to being the "Sun Parlour" of Canada due to its southern location.

Leamington enjoys the second warmest climate in Canada, after the Lower Mainland of British Columbia. Leamington is situated on the beautiful north shore of Lake Erie and is in close affinity with Point Pelee National Park, a major site for migrating birds especially in fall of the year. As such, it plays host to many birdwatchers from Canada, the United States and further afield from all around the world, especially in the peak month of October. The region is also known for the migration of Monarch butterflies, which congregate in the fall at Point Pelee before making their way across Lake Erie on their route to winter quarters in central Mexico.

Another important natural area near Leamington is the wetland at Hillman Marsh, located six kilometres east of the town.