Windsor, Ontario: A Case Study in Getting the Percentage Right

Windsor, Ontario, sits at the centre of a mistake this publication made and is correcting in public, because the underlying lesson — always state what a percentage is calculated against — applies to every demographic claim we publish about the Mexican community in Canada, not just this one city.

The error, restated plainly

An earlier piece described Windsor's population as "41% Mexican." That figure was real, but it measured the wrong thing: 41% was the share of Mexican-origin residents within Windsor's Latin American population — a pan-ethnic census category that also includes people of Colombian, Salvadoran, Peruvian, Chilean, and other Latin American backgrounds. It was not, and was never intended by Statistics Canada to be read as, 41% of Windsor's total population. The actual population-wide figure for Mexican origin in the Windsor census metropolitan area (CMA) is 4,280 people out of 415,505 — 1.0%. Both numbers are legitimate statistics; only one of them answers the question "what share of Windsor is Mexican?"

We want to be transparent about the limits of what we could re-verify during this specific research session. The 4,280-of-415,505 CMA figure was previously checked by this team directly against the Statistics Canada 2021 Census Profile for the Windsor CMA. We attempted to reload that profile page again this session and could not — statcan.gc.ca returned errors on every specific profile and highlight-table URL we tried. We are therefore restating the figure as a previously verified internal reference, not as something freshly re-confirmed today, and we're flagging that distinction rather than presenting it with false certainty.

What we could verify fresh this session: the city-level trend

Separately from the CMA-level Mexican figure, we were able to load Wikipedia's "Windsor, Ontario" entry directly, which cites Statistics Canada's 2021 and 2001 Census data for the city of Windsor specifically (a smaller geography than the CMA, and using the broader "Latin American" panethnic category rather than "Mexican" alone). That data shows real growth: 2,135 residents identifying as Latin American in 2001 (1.04% of the city's population that year), rising to 3,500 in 2021 (1.55% of a city population of 229,660). That's a genuine, documented near-doubling in absolute numbers over two decades, and a meaningful rise in share of population too — from roughly 1 in 96 residents to roughly 1 in 65.

Two different geographies (city vs. CMA) and two different census categories (Latin American vs. Mexican specifically) are now in play in this article, and it would be easy to blur them together carelessly — which is exactly the failure mode we're trying to correct. So, explicitly: the 1.55% figure describes Latin Americans of all backgrounds as a share of the city of Windsor in 2021. The 1.0% figure describes people of Mexican origin specifically as a share of the larger Windsor CMA, also in 2021. They are not the same base, and we did not find a single source this session that reports both categories at the same geographic level, which means we cannot cleanly compute what share of the city (as opposed to the CMA) is Mexican, or what share of the CMA (as opposed to the city) is Latin American more broadly.

Doing the arithmetic honestly — and stopping where the data does

Here's where a genuinely careful reader might ask: if Mexican-origin residents are 41% of Windsor's Latin American population, and 1.0% of the Windsor CMA overall, can we back into how large the total Latin American population of the Windsor CMA is? Mechanically, yes — dividing 4,280 by 0.41 implies a Latin American CMA population somewhere in the neighbourhood of 10,000 to 10,500. But we're deliberately not stating that as a verified number. We do not have a Statistics Canada source, loaded and checked this session, that reports the Windsor CMA's total Latin American population directly — only the city-level figure (3,500, on a smaller population base of 229,660, not the CMA's 415,505). Backing into a number through arithmetic on two figures from different sources, without a primary source that states it directly, is exactly the kind of unverified inference our own editorial rules ask us to label rather than present as fact. So: the implied range above is offered as a plausibility check on the original 41% claim, not as a new statistic to be repeated elsewhere.

Why Windsor specifically

None of this is arbitrary. Windsor sits at the western edge of Essex County, immediately adjacent to Leamington and Kingsville — Ontario's greenhouse belt and, per the 2006 Census, home to the highest concentration of Latin American residents of any place in Canada (4.9% of Leamington's population that year), covered in more detail elsewhere in this series. Windsor's own above-average Latin American population is plausibly connected to that regional greenhouse economy, functioning as a nearby city where seasonal and permanent Latin American and Mexican residents alike can access services, shopping, and community that a smaller town like Leamington cannot fully provide on its own. We did not find a source this session that states this connection directly — it is a reasonable geographic inference, not a documented fact, and we're labelling it as such.

The rule going forward

Every population claim in this publication's Canada coverage should state, in the sentence itself, which of at least three things it's measuring: Mexican origin specifically or the broader Latin American category; the city or the census metropolitan area; and the specific census year. Windsor is the case where getting that wrong already happened once. It shouldn't happen the same way twice.