- Labor Council of New South Wales (1871 - 1935)
- Labour History Collection (c. 1870 - )
- Laird, David
- Lake Cargellico Parish, Anglican Diocese of Riverina
- Lamb Memorial
- Lamb, P.N.
- Lambton Mechanics Institute (1870 - 1958)
- Lampe, Annie
- Landers, J. Lenora
- Langtry, Joseph Ignatuis (1880 - )
- Lapthorne, Ernest (1871 - 1916)
- Laszlo, I. M.
- Lawson, Joseph Alexander (1894 - )
- Leeton Cannery Employees' Welfare Association
- Leeton Parish, Anglican Diocese of Riverina
- Legacy (1945 - 1978), Wollongong
- Legacy Club
- see Wagga Wagga Legacy Club
- Leitch Family
- Lennon, Tom (c. 1908 - 1992)
- Leonora Glass
- Letona Co-operative Cannery Ltd (1935 - 1994)
- Lewis Family
- Leys, Margie Schmid
- Liberal Party of Australia (1946 - 1970)
- Library Association of Australia, NSW Branch Council
- Library Association of Australia, Riverina Regional Group
- Library Association of Australia (1952 - 1983), Central Coast and Hunter Region Branch
- Library Association of Australia (1964 - 1978)
- Lim Sue, Charley ( - 1898)
- Central Wagga, Lions Club -
- see Lions International
- Lions Club - South Wagga
- see Lions International, Wagga Wagga South
- Lions International, Central Wagga
- Lions International, Sub-district 201E
- Lions International, Wagga Wagga South
- Llangothlin
- Lobb, Lawson
- Lockhart Parish, Anglican Diocese of Riverina
- Loder, George
- Loder, Max
- Loder, W.M.
- Lodge Leopold United, Grand Mason Lodge of New South Wales
- The London Bank of Australia Ltd (1893 - 1921)
- Long, George Merrick (1874 - 1930)
- Longworth Family (1926 - 1953)
- Lonsdale Family
- Low, William
- Low, William (Junior) (c. 1863 - )
- Lowe, Charles Bruce (1845 - 1894)
- Lowrey, Jack
- Loyal Orange Lodge (1879 - 1925), Gerringong True Blue No. 115
- Loyal Orange Lodge, No 111
- Lusher Family
- Lusher, Stephen Augustus (1945 - )
- Lysaght, John Charles Fettiplace (1909 - )
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