20 Frith Street is a building in the Soho district of London. It is located on the east side of Frith Street, close to the junction with Old Compton Street. The building which currently occupies the site of 20 Frith Street was built in 1858 by William Cooze to replace a house which dated from c1725, which itself may have replaced an even earlier building.

Frith Street is in the Soho area of London. To the north is Soho Square and to the south is Shaftesbury Avenue. The street crosses Old Compton Street, Bateman Street and Romilly Street.