Grated Parmesan price in Chicago.

How we got these numbers

• Instacart — Aldi:Category multiplier against Walmart base, adjusted for Midwest Urban ($3.96)
• Walmart+:Regional baseline ($4.17)
• Amazon Fresh (Prime):Category multiplier against Walmart base, adjusted for Midwest Urban ($5.00)
• Instacart — Whole Foods:Category multiplier against Walmart base, adjusted for Midwest Urban ($8.75)

Live observations come from public weekly ads (Aldi, Whole Foods) and BLS Average Retail Food Prices, refreshed daily. Estimates use a per-category multiplier calibrated to NPR, Consumer Reports, and Tasting Table grocery comparison studies.

Why this category prices the way it does

Dairy is the most regionally stable category — milk and eggs track USDA market reports closely, so the price gap between services is usually under 25%.

Chicago grocery context

Chicago is essentially Aldi's American hometown — their US HQ in Batavia means the Midwest gets pricing tested first, and the delivery footprint here is the densest in the country. Mariano's (Kroger-owned) competes head-on with Whole Foods on premium produce, often at lower prices. Winter affects same-day delivery reliability between December and March; many shoppers shift to scheduled delivery windows of 2+ hour duration. The South and West Sides have historically had fewer grocery options, which Walmart+ has partially filled in — its Pullman and Chatham stores anchor much of South Side delivery.

Chicago shoppers consistently save the most by going Instacart-Aldi for full weekly baskets. Add Mariano's for produce when you want a step up from Aldi but still want to beat Whole Foods. Avoid same-day windows after a snowstorm — slot scheduling is more reliable.

Grated Parmesan prices in other cities

• Indianapolis, IN
• Columbus, OH
• Denver, CO