Factories, garages, works, etc., as listed in 1963. Names of businesses listed by first letter, from J to L.
- A. & R. Jackson
- T.S. Jackson & Sons, Ltd
- F.G. Jane
- A. & C. Jenner, Ltd.
- J. & M. Precision Engineers, Ltd
- F.E. Johnson
- F. Jordan
- Karley & Wilkinson (General Engineers)
- J.T. Keep & Sons, Ltd.
- Keiner & Co., Ltd.
- Kelsey Industries, Ltd.
- Kemworthy Jig and Tool Press Co.
- Khama Transport
- H. Kimber, Ltd.
- A. Jordan & W. King
- L. & H. Home Furnishers
- The Lamben Sheet Metal Co., Ltd.
- Lambert & Son
- Lancaster & Co., Mitcham, Ltd.
- H. Landseer-Bailey
- A. Larkin
- Latham Brown & Co., Ltd.
- R.F. Law
- C. Leggatt & Son, Ltd.
- Lester & Cann, Ltd.
- Thomas H. Lewis & Sons, Ltd
- Leyens Carboard Box Co. Ltd.
- George Lillington & Co.
- Lion Case Co., Ltd.
- Lloyd Parkinson Ltd.
- Locomotors, Ltd.
- London Electricity Board
- Long & Watson
- G. Lowes
- Lyndeau Products Ltd.
- Lyon Bros
Mitcham History Notes 