# Tesla becomes a naturalised citizen of the United States

Date: 1891

## The fact

On 30 July 1891 [Tesla](/people/nikola-tesla), aged 35, became a naturalised citizen of the United States. Britannica and ETHW independently record 1891 citizenship. It is a civic instrument, not a motor.

## Context

He had immigrated in 1884. Citizenship is stored because later U.S. patent, medal and wartime-paper files treat him as an American inventor-engineer. It is not a claim that naturalisation caused Niagara.

Nikola Tesla is not the sole author of every later object, law, or museum label that uses the name. Shared work with courts, excavators, printers, spouses, officials, and later states does not erase a documented role, and it does not make an ancient person the signer of a twentieth-century statute.

## Evidence and sources

Britannica’s biography and IEEE/ETHW independently date U.S. citizenship to 1891.

Official or archival record: Britannica — Nikola Tesla (https://www.britannica.com/biography/Nikola-Tesla; Encyclopaedia Britannica).

## Significance

Civic-membership path. High confidence on the year; low on public-welfare weight.

A certificate is not a generating station. Keep the weight low.

## What is established and what is not

Established: U.S. naturalisation in 1891. Not established: that citizenship invented polyphase current, or that it cancelled later hotel-bill poverty.

What would change the picture: a contradictory original with a different date or name, or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of later institutions.

The date is the date of this instrument, not a licence to back-date every later harm or benefit.

## People

- Nikola Tesla: https://factrail.ai/people/nikola-tesla

## Drivers

- Democratic Resilience: https://factrail.ai/drivers/democratic-resilience

## Sources

- https://www.britannica.com/biography/Nikola-Tesla
- https://ethw.org/Nikola_Tesla

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/us-tesla-citizenship-1891