The 34-year-old's income of $56m (£45.7m) lands her below seventh-placed male actor Adam Sandler.
She earned $15.5m (£12.6m) more than she did in 2018, thanks largely to the success of Avengers: Endgame.
Modern family actor Sofia Vergara is the only other woman to break into the overall top 10.
Earlier this week, Dwayne Johnson was announced as the highest-paid actor of the last 12 months, making $89.4m (£73.6m) according to the latest annual rankings from the financial experts.
Notably all of the top 10 actresses earned above $20m (£16.3) this year, compared with last year when only the top two - Johansson and Angelina Jolie made that amount.
Johansson is set to reprise her title role in the Avengers spin-off Black Widow next year.
Forbes list of the world's best-paid female actors 2019
- Scarlett Johansson - $56m (£45.7m)
- Sofia Vergara - $44.1 (£35.9m)
- Reese Witherspoon - $35m (£28.5m)
- Nicole Kidman - $34m (£27.7m)
- Jennifer Aniston - $28m (22.8m)
- Kaley Cuoco - $25m (£20.4m)
- Elisabeth Moss - $24m (£19.5m)
- Margot Robbie - $23.5m (£19.1m)
- Charlize Theron - $23m (£18.7m)
- Ellen Pompeo - $22m (£17.9m)