Yes, the American Community Survey is mandatory. Title 13 of the U.S. Code requires anyone 18 or older at a selected address to answer the questions to the best of their knowledge, and the statute sets fines for refusing or for providing false information.1Office of the Law Revision Counsel. Title 13 – Census2United States Census Bureau. Understanding the 2024 American Community Survey 1-Year Estimates3U.S. Census Bureau. Understanding and Using American Community Survey Data: What All Data Users Need to Know Because the survey goes to addresses rather than named people, whoever lives there when the letter arrives is the one on the hook.
The Legal Obligation and the Penalties
Title 13 covers questions about you, your family, and your housing situation. Two kinds of violations carry separate fines under 13 U.S.C. § 221:
- Refusing to answer or ignoring the survey: a fine of up to $100.1Office of the Law Revision Counsel. Title 13 – Census
- Deliberately giving false answers: a fine of up to $500.1Office of the Law Revision Counsel. Title 13 – Census
Those figures come from Title 13 itself. The general federal sentencing statute at 18 U.S.C. § 3571 can push fines higher depending on how the offense is classified, potentially up to $5,000.4Office of the Law Revision Counsel. 18 USC 3571: Sentence of Fine
In practice, the Bureau has not prosecuted anyone for failing to respond since the 1970 census. Its approach relies on repeat mailings, phone calls, and in-person visits rather than court filings. The legal duty is real, and the visits are real, but the fine is essentially a backstop the agency has chosen not to invoke for decades.
What the Survey Asks
The questionnaire covers more than 40 topics across four categories.5United States Census Bureau. American Community Survey Information Guide Some questions feel personal, and knowing what’s coming makes it easier to work through the form.
- Demographic: age, sex, race, ethnicity, and household relationships.
- Social: educational attainment, place of birth, citizenship status, veteran status, language spoken at home, and disability status.
- Economic: employment status, occupation, industry, income sources, commuting patterns, and health insurance coverage.
- Housing: home value or monthly rent, utility costs, number of rooms, year built, type of heating fuel, and whether the household has internet access and computing devices.
The 2026 questionnaire is unchanged from 2025. The Census Bureau has proposed updates for 2027, including revised race and ethnicity questions to match updated federal standards.6United States Census Bureau. 2026 ACS Updates
How To Respond
Data collection runs monthly. Each monthly sample gets about a two-month self-response window followed by a one-month in-person follow-up phase.7U.S. Census Bureau. 2024 American Community Survey Mailout Timing Test The Bureau prefers online response, but you have other options.
Online or by Mail
Your first mailing contains a User ID that you enter at respond.census.gov/acs. If you don’t respond after the first two mailings, more mailings follow, including a paper questionnaire with a postage-paid return envelope.
By Phone
You can call the Telephone Questionnaire Assistance line at 1-800-354-7271 to answer the survey by phone. The same number handles lost User IDs and PIN resets, and it’s staffed throughout the collection period.8United States Census Bureau. Respond Online
In-Person Follow-Up
Addresses that don’t respond by internet, mail, or phone may be selected for a follow-up visit from a Census Bureau field representative. The follow-up covers a subsample of non-responders, so not every household that ignores the mail gets a knock, but many do.
Verifying a Census Bureau Representative
Before you answer questions at your door, you can confirm the person is who they say they are. Legitimate field representatives carry an ID badge showing their name, photograph, a Department of Commerce watermark, and an expiration date. They also carry an official Census Bureau bag and a Bureau-issued electronic device with the Census Bureau logo.9United States Census Bureau. How to Identify a Census Employee
If you still have doubts, call the Regional Office for your state:
- Atlanta (AL, FL, GA, LA, MS, NC, SC): 1-800-424-6974
- Chicago (AR, IL, IN, IA, MI, MN, MO, WI): 1-800-865-6384
- Denver (AZ, CO, KS, MT, NE, NM, ND, SD, OK, TX, UT, WY): 1-800-852-6159
- Los Angeles (AK, CA, HI, ID, NV, OR, WA): 1-800-992-3530
- New York (CT, ME, MA, NH, NJ, NY, PR, RI, VT): 1-800-991-2520
- Philadelphia (DE, DC, KY, MD, OH, PA, TN, VA, WV): 1-800-262-4236
You can also search the Bureau’s staff directory at census.gov/staffsearch to look up an employee by name or phone number.10United States Census Bureau. Census Bureau Staff Search The general Census Bureau customer service line is 1-800-923-8282.11United States Census Bureau. Contact Us
How Your Answers Are Protected
The mandate to answer comes packaged with strict confidentiality rules. Title 13 prohibits the Census Bureau from releasing any information that could identify a specific person or business. Individual responses cannot be shared with any other government agency, including the IRS, law enforcement, or immigration authorities, and they cannot be used as evidence in any court or administrative proceeding.12Office of the Law Revision Counsel. 13 USC 9 – Information as Confidential; Exception All published ACS data comes out in aggregated statistical form.
Every Census Bureau employee signs a lifetime sworn affidavit of nondisclosure, and the obligation continues after they leave the agency.13United States Census Bureau. Oath of Non-Disclosure A current or former employee who unlawfully discloses protected information faces a federal felony under 13 U.S.C. § 214, with a fine of up to $5,000, up to five years in prison, or both.14Office of the Law Revision Counsel. 13 US Code 214 – Wrongful Disclosure of Information
On the technical side, online responses are encrypted in transmission and stored on the Bureau’s private internal network, isolated from the public internet by firewalls. Access requires two-factor authentication, and the Bureau monitors traffic across its IT systems continuously.15United States Census Bureau. How We Protect Your Information
If You Live in Group Quarters
The mandate isn’t limited to traditional households. The ACS also samples residents of college dorms, worker housing, military barracks, correctional facilities, and nursing homes. The Bureau contacts a facility manager for a resident list, samples from it, and interviews the selected individuals. Since January 2024, residents of noninstitutional group quarters who are selected can self-respond online instead of waiting for an in-person interview.16United States Census Bureau. For People Living in Group Housing – ACS GQ The same legal duty to respond applies.