The U.S. Geographic Names Information System (GNIS) has formally changed the name for Lake Ontario to Lake America in the United States. Google Maps will reflect this change, as announced in a Google blog post on August 29, 2026.
The update means that users in the U.S. will see "Lake America" instead of "Lake Ontario" when viewing the lake on Google Maps. The change applies specifically to the U.S. portion of the lake, as the GNIS is a U.S. federal standard for geographic names.
How the name change will appear
Google Maps will update its labels to match the GNIS designation. The blog post states that since Google updates Maps based on official sources, the new name will be displayed. The exact timing of the update was not specified in the source.
The change is limited to the U.S. side of the lake; the Canadian side may retain the traditional name, though the source does not confirm this. Google's announcement focuses on the U.S. GNIS change.
What this means for users
Users searching for the lake in Google Maps will see the new name in the U.S. This could affect local businesses, navigation, and geographic references that rely on the lake's name. The update is part of Google's ongoing process of aligning with official geographic naming standards.
The blog post did not provide a specific date for when the change will take effect, leaving the rollout timeline open. Users may see the update gradually as Google refreshes its map data.