Tehran is around the same size as El Paso.

El Paso is approximately 670 sq km, while Tehran is approximately 686 sq km, making Tehran 2% larger than El Paso.
Tip: This to-scale comparison of El Paso vs. Tehran uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.