Microwave ovens are nearly universal in U.S. homes, but ownership and cooking frequency vary by housing, tenure, household characteristics, home size, and climate. The latest detailed Energy Information Administration (EIA) household tables describe 2020 conditions, while Department of Energy (DOE) estimates describe energy use and shipments from earlier periods.
Contents
- Microwave ownership in U.S. homes
- How often households use microwaves
- Housing type and tenure
- Household size, income, and home size
- Differences across climate regions
- Energy use and operating measurements
Microwave ownership in U.S. homes
The EIA counted 118.65 million microwave ovens in U.S. homes in 2020. Of those, 113.18 million homes had exactly one microwave and 5.47 million had two or more. Separately, 4.88 million primary-occupied homes did not have a microwave oven. These figures come from EIA Table HC3.1, Appliances in U.S. homes by housing unit type, 2020.
The housing-unit breakdown shows how widespread the appliance was across different home types. Single-family detached homes accounted for 75.13 million microwave-equipped homes. Single-family attached homes accounted for 7.15 million, while apartments in 2–4-unit buildings accounted for 8.54 million. Apartments in buildings with five or more units accounted for 21.18 million equipped homes, and mobile homes accounted for 6.65 million.
Single-family detached homes also represented the largest group with multiple appliances: 70.82 million had exactly one microwave, and 4.31 million had two or more in 2020. In larger apartment buildings, 1.66 million homes did not have a microwave oven. The categories are not interchangeable: the EIA tables separately report homes without an oven and homes reporting zero uses per week.
Microwave ownership has a longer history in the Bureau of Labor Statistics record. BLS reports that ownership rose from less than 1% of U.S. households in 1971 to 25% in 1986. That historical comparison describes the period 1971–1986 and should not be treated as a current ownership estimate. See BLS, Hedonic Quality Adjustment Methods for Microwave Ovens in the U.S. CPI.
How often households use microwaves
The 2020 EIA frequency categories show substantial use rather than simple ownership alone. U.S. homes reported the following microwave-use frequencies:
| Reported weekly use | U.S. homes, 2020 |
|---|---|
| 1–3 times | 9.05 million |
| 4–7 times | 38.95 million |
| 8–14 times | 31.10 million |
| At least 15 times | 38.14 million |
| Zero uses | 1.41 million |
The zero-use figure is reported even though the table also has a separate no-oven category. It therefore should be read as a reported-use category, not as a replacement for the ownership count. All figures in this section are from EIA Table HC3.1, measured for 2020.
Single-family detached homes had 27.23 million households using a microwave at least 15 times per week. Apartments in buildings with five or more units had 4.87 million households in that same highest-frequency category. Mobile homes had 2.26 million households using a microwave 4–7 times per week. These counts show the scale of frequent use by housing type, but they do not establish why households used their appliances or what foods they prepared.
Tenure-specific frequency data adds another view. Renter households in single-family and mobile homes included 13.70 million homes using a microwave 4–7 times per week. Apartment renters included 5.79 million homes using one at least 15 times per week. Apartment renters also included 3.34 million homes using a microwave 1–3 times per week. These are EIA 2020 counts from Table HC3.2, Appliances in U.S. homes by owner or renter status.
Housing type and tenure
Ownership differs sharply between detached or mobile homes and apartments when owner and renter status are separated. In 2020, owner-occupied single-family and mobile homes had 76.82 million microwave-equipped homes. The corresponding renter-occupied group had 37.79 million. Owner-occupied apartments had 4.04 million equipped homes, compared with 25.68 million renter-occupied apartments.
The frequency category of at least 15 uses per week also differs by tenure and housing grouping:
| Housing and tenure grouping | Homes using a microwave at least 15 times weekly, 2020 |
|---|---|
| Owner-occupied single-family and mobile homes | 28.76 million |
| Renter-occupied single-family and mobile homes | 9.38 million |
| Owner-occupied apartments | 1.06 million |
| Renter-occupied apartments | 5.79 million |
These figures are reported in EIA Table HC3.2. They are counts of homes, not percentages of each tenure group, so the larger count in one category does not by itself indicate a higher rate of use. The data also do not measure appliance age, wattage, or whether a microwave was built into the kitchen.
Household size, income, and home size
Household size is another dimension of microwave ownership. One-person households had 31.52 million microwave-equipped homes in 2020. Two-person households had 43.84 million. Households with five or more members had 10.48 million equipped homes and 4.46 million homes using a microwave at least 15 times per week. These counts come from EIA Table HC3.4, Appliances in U.S. homes by number of household members.
Income categories provide additional counts without proving that income caused a particular cooking pattern. Households earning $60,000–$99,999 had 26.80 million microwave-equipped homes, while households earning $150,000 or more had 16.42 million. Among households earning less than $5,000, 0.41 million homes did not have a microwave oven. Homes earning $20,000–$39,999 included 6.86 million using a microwave at least 15 times per week, and the $60,000–$99,999 group included 8.85 million in that category.
These income figures are from EIA Table HC3.5, Appliances in U.S. homes by household income. The table reports household groupings for 2020; it does not establish household budgets, food prices, or the reasons for microwave use.
Home size also has a clear scale in the EIA counts. Homes smaller than 1,000 square feet had 27.64 million microwave-equipped homes in 2020. Homes of 3,000 square feet or more had 17.02 million. Among homes measuring 2,500–2,999 square feet, 4.02 million used a microwave at least 15 times per week. These figures are from EIA Table HC3.9, Appliances in U.S. homes by home size.
Differences across climate regions
The EIA’s climate-region table counts microwave-equipped homes across several U.S. regions. Very-cold/cold climate regions had 40.92 million equipped homes in 2020, mixed-humid regions had 35.29 million, and hot-humid regions had 21.64 million.
Frequent use was also recorded by region. Very-cold/cold regions had 13.82 million homes using a microwave at least 15 times per week. Mixed-dry/hot-dry regions had 4.72 million in that category. Marine regions had 0.27 million homes with two or more microwave ovens. The underlying geographic groupings and 2020 counts are in EIA Table HC3.6, Appliances in U.S. homes by climate region.
Regional counts should not be read as usage rates without the total number of homes in each climate category. They describe the number of homes in the reported category, not the average number of cooking cycles, meal types, or minutes of operation.
Energy use and operating measurements
DOE’s microwave-oven assessment estimated average electricity consumption at 166 kWh per year per microwave oven. In a 2013 standards analysis, DOE estimated that microwave ovens used 0.65 quads of primary energy per year and represented about 0.3% of residential electricity use. The same 2013 estimate put standby and off-mode energy at about 15% of microwave-oven energy use. Estimated U.S. microwave-oven shipments were 13.4 million units in 2017. These are estimates for their stated periods, not measurements of every appliance operating today. They are documented in the DOE MWO ECS RFI FAQ.
The energy figures provide context for appliance ownership, but the 166 kWh average is not a household cooking bill. Actual electricity use can vary with the appliance, operating time, power setting, standby behavior, and cooking practices. The supplied DOE assessment also includes the 2013 primary-energy and residential-electricity estimates; those older figures should remain labeled by year when compared with newer household data.
Food heating has measurable operating limits as well. The U.S. Department of Agriculture’s Food Safety and Inspection Service identifies about 2,450 MHz as the operating frequency used by microwave ovens. FSIS says microwaves penetrate food about 1 to 1.5 inches before heat conduction becomes the main process toward the center. This helps explain why food shape, quantity, arrangement, and standing time affect results; the statement is a description of the heating process, not a household-use statistic.
For reheated ready-to-eat foods and leftovers, FSIS recommends reaching 165°F after standing time. Its microwave-safe utensil test uses 1 cup of tap water heated on high for 1 minute. These practical measurements and safety guidance appear in FSIS, Cooking with Microwave Ovens. The guidance is undated in the supplied source and should not be assigned a 2020 or 2026 measurement year.