Greenfield is a city in Milwaukee County, Wisconsin, home to about 37,345 people across 12 square miles. Its ZIP codes are 53220 and 53228, and parts of 53221 are in Greenfield too.
Homes sold for a median of $214 per square foot across 2 ZIP codes in the three months ending August 2026, and all of them were seller’s markets.
Mostly Greenfield; also Milwaukee
Mostly Greenfield; also Milwaukee
Mostly Milwaukee; part is in Greenfield
Each card is that ZIP code’s whole market, including any part outside Greenfield. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Greenfield’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | General Mitchell International Airport (MKE)5 miles away |
|---|---|
| Nearest city of 250,000+ | Milwaukee, WI7 miles away |
| Nearest city of 1 million+ | Chicago, IL79 miles away |
Straight-line distances from the center of Greenfield; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Greenfield had 37,803 residents in the 2020 census, up 7% since 2000.
It’s the 21st largest of 1,889 towns in Wisconsin by population.
Milwaukee County grew from 330,017 residents in 1900 to 939,489 in 2020.
Milwaukee County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 83°F in summer, and winter lows average 12°F. About 38.6 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Hales Corners/Whitnall Park/Bo, WI weather station (2 miles away).
435,400 jobs at 20,466 businesses in Milwaukee County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
600 doctors and other health care providers list an office in Greenfield’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 70 |
|---|---|
| Specialist doctors | 68 |
| Dentists | 33 |
| Nurse practitioners and physician assistants | 102 |
| Mental health providers | 121 |
| Physical and occupational therapists | 175 |
| Optometrists | 13 |
| Chiropractors | 18 |
| Pharmacies | 10 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (35 nearby)
Grocery stores (11 nearby)
Pharmacies (1 nearby)
Libraries (2 nearby)
Museums (1 nearby)
Theaters and performance venues (2 nearby)
Counts are within about 2.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Milwaukee School District, Whitnall School District, Greenfield School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Academy of Accelerated LearningMilwaukee | Pre-K–5 | 493 | Public | 1.2 mi |
| Alcott ElementaryMilwaukee | Pre-K–8 | 264 | Public | 2.1 mi |
| Core4Greenfield | Pre-K | 87 | Charter | 2.9 mi |
| Edgewood ElementaryGreenfield | Pre-K–5 | 325 | Public | 1.4 mi |
| Elm Dale ElementaryGreenfield | Pre-K–5 | 477 | Public | 2.1 mi |
| Glenwood ElementaryGreenfield | Pre-K–5 | 307 | Public | 1.9 mi |
| Honey Creek ElementaryMilwaukee | Pre-K–5 | 393 | Charter | 1.3 mi |
| Maple Grove ElementaryGreenfield | Pre-K–5 | 427 | Public | 0.4 mi |
| Whitman ElementaryMilwaukee | Pre-K–8 | 339 | Public | 1.2 mi |
| Greenfield MiddleGreenfield | 6–8 | 704 | Public | 2.4 mi |
| Wedgewood Park SchoolMilwaukee | 6–8 | 541 | Public | 1.4 mi |
| Whitnall MiddleGreenfield | 6–8 | 558 | Public | 2.9 mi |
| Greenfield HighGreenfield | 9–12 | 1,140 | Public | 0.9 mi |
| Hamilton HighMilwaukee | 9–12 | 1,472 | Public | 1.4 mi |
| Whitnall HighGreenfield | 9–12 | 821 | Public | 2.8 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Our Father's Lutheran SchoolGreenfield | Pre-K–8 | 82 | Lutheran Church–Missouri Synod | 3.2 mi |
| St Jacobi Evangelical Lutheran SchoolGreenfield | Pre-K–8 | 191 | Wisconsin Evangelical Lutheran Synod | 1.0 mi |
| St John the Evangelist SchoolGreenfield | Pre-K–8 | 147 | Roman Catholic | 1.0 mi |
| St Johns Lutheran SchoolMilwaukee | Pre-K–8 | 304 | Wisconsin Evangelical Lutheran Synod | 0.8 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Milwaukee.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.