Besides the several parks and parkways, Olmsted and his successor firms designed a number of other projects in Buffalo and surrounding areas which were constructed or proposed over the years.
- Parkside subdivision, 1872-1886 (partially completed).
- Niagara Square, 1874 (partially constructed, also intended to incorporate a proposed Soldier’s Memorial Arch by H. H. Richardson which was not constructed); design reworked in 1895 (not constructed)
- City and County Hall (now Old Erie County Hall), 1875-1878 (the grounds facing Delaware avenue were destroyed in 1963 by a building addition).
- New York State Asylum for the Insane (now the Buffalo Psychiatric Center, the Richardson-Olmsted Complex, and Buffalo State College), ca. 1877 (partially destroyed by building additions).
- Lafayette Square, 1883, (landscape plan, later replaced by alterations to the square).
- Hyde Park Land Syndicate, 1885-1890 (plans not located).
- Villa Park subdivision, 1885-1887. (Street plan intact.)
- South Park (original proposal), 1886 (not constructed).
- New York State Niagara Reservation, 1886. (partially destroyed by later construction).
- Addition to The Front, 1887-1891 (partially constructed).
- John J. Albright residence, 730 West Ferry Street, Buffalo, NY 1890-1907 (demolished in 1935). (Albright was a business partner of Wm. A. Rogers and of Edmund B. Hayes. Albright and Hayes were principals in the Ontario Power Company. Some few peripheral elements of the estate remain, but none of the Olmsted landscaping survives.).
- Edmund B. Hayes residence, 147 North Street, Buffalo, NY, 1891-1893 (lost). (Hayes was a business partner of John J. Albright.).
- Depew Improvement Co., Depew, NY 1892-1894. (partially completed).
- William A. Rogers residence, 309 North Street, Buffalo, NY, 1893-1895 (lost). (Wm. A. Rogers was a business partner of John J. Albright.),
- Franklin D. Locke residence, East Aurora, NY, 1895 (status unknown)
- Robert W. Pomeroy residence, 70 Oakland Place, Buffalo, NY, 1896 or 1897 (plans not located, landscape status unknown)
- Robert Livingston Fryer residence, 685 Delaware Avenue, Buffalo, NY, 1900-1901. (Fryer was a son-in-law to Pascal P. Pratt.)
- Natural Food Company (later known as The Shredded Wheat Company, which was in turn sold to the National Biscuit Co.), Niagara Falls, NY, 1901 (demolished, 1963-1976)
- Ontario Power Company, Niagara Falls, Ontario, Canada, 1904.
- Spencer Kellogg, Sr. residence, 805 Delaware Avenue, Buffalo, NY, 1904 (lost, site presently occupied by Temple Beth Zion).
- Buffalo Civic Center, 1919 (not constructed).
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