Elizabeth Johnson, née Reynolds (8 July 1721 – 14 May 1800), was an English pamphleteer who attempted to win one of the rewards offered by the 1714 Longitude Act passed, which offered monetary rewards for anyone who could find a simple and practical method for the precise determination of a ship's longitude.

Among her siblings was the acclaimed artist Sir Joshua Reynolds, who used her as a model for works which were widely copied in mezzotint.

"[4] The Astronomy and Geography of the Created World,[5] her fourth pamphlet published in 1785, included a short reference to longitude.

The pamphlet ended with the claim "that if the palm for finding the longitude, is not given to the author of the Explanation of the Vision to Ezikiel it will never be given to another".

The modern attribution of the Ezekiel pamphlet to Johnson has only recently revealed that the author of the 1785 work was a rare female longitude-seeker,[4] as she even remained anonymous when sending it to the Board of Longitude in 1786[6] in the hope of a reward.