Oscar Beauchemin (c. 1876 – January 15, 1938) was an American architect, and civil engineer based out of Holyoke, Massachusetts who designed a number of tenements and commercial blocks in the Greater Springfield area, and whose work was prominent in the Main Street architectural landscape of the Springdale neighborhood of Holyoke, Massachusetts.

Having a long-held interest in designing buildings, he first became active as an architect in 1903,[1] and opened his own independent firm in 1908.

[6] Throughout his life he was an active member Massachusetts Catholic Order of Foresters and was known to be a competitive candlepin bowler.

[1] While known to have constructed smaller dwellings as well, Beauchemin's works were generally large brick tenements with ground-floor storefronts or offices, done in the neoclassical style.

Among features common to his work were festoon-adorned friezes, belt courses and angled windows placed at a corner of the front facade.