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# Companies in Washington, DC

Pick an industry to see the bigger companies headquartered in Washington, DC, what they do and how big they are.

By Enrich.chat Editorial. Updated October 22, 2026.

## Industries in Washington, DC

- [Nonprofit Organizations in Washington, DC](https://enrich.chat/companies-in/washington-dc/non-profit-organizations/): Non-profit Organizations
- [Consulting Firms in Washington, DC](https://enrich.chat/companies-in/washington-dc/business-consulting-and-services/): Business Consulting and Services
- [IT Services Companies in Washington, DC](https://enrich.chat/companies-in/washington-dc/it-services-and-it-consulting/): IT Services and IT Consulting
- [Real Estate Companies in Washington, DC](https://enrich.chat/companies-in/washington-dc/real-estate/): Real Estate
- [Software Companies in Washington, DC](https://enrich.chat/companies-in/washington-dc/software-development/): Software Development
- [Hospitals and Health Care Organizations in Washington, DC](https://enrich.chat/companies-in/washington-dc/hospitals-and-health-care/): Hospitals and Health Care
- [Law Firms in Washington, DC](https://enrich.chat/companies-in/washington-dc/law-practice/): Law Practice
- [Financial Services Companies in Washington, DC](https://enrich.chat/companies-in/washington-dc/financial-services/): Financial Services
- [Construction Companies in Washington, DC](https://enrich.chat/companies-in/washington-dc/construction/): Construction
- [Public Relations Firms in Washington, DC](https://enrich.chat/companies-in/washington-dc/public-relations-and-communications-services/): Public Relations and Communications Services
- [Advertising Agencies in Washington, DC](https://enrich.chat/companies-in/washington-dc/advertising-services/): Advertising Services
- [Technology and Internet Companies in Washington, DC](https://enrich.chat/companies-in/washington-dc/technology-information-and-internet/): Technology; Information and Internet
- [Legal Services Firms in Washington, DC](https://enrich.chat/companies-in/washington-dc/legal-services/): Legal Services
- [Education Organizations in Washington, DC](https://enrich.chat/companies-in/washington-dc/education-administration-programs/): Education Administration Programs
- [Colleges and Universities in Washington, DC](https://enrich.chat/companies-in/washington-dc/higher-education/): Higher Education
- [Government Agencies in Washington, DC](https://enrich.chat/companies-in/washington-dc/government-administration/): Government Administration
- [Research Services Firms in Washington, DC](https://enrich.chat/companies-in/washington-dc/research-services/): Research Services
- [Architecture Firms in Washington, DC](https://enrich.chat/companies-in/washington-dc/architecture-and-planning/): Architecture and Planning
- [Environmental Services Companies in Washington, DC](https://enrich.chat/companies-in/washington-dc/environmental-services/): Environmental Services
- [Training and Coaching Firms in Washington, DC](https://enrich.chat/companies-in/washington-dc/professional-training-and-coaching/): Professional Training and Coaching

**Short answer:** Browse the bigger companies headquartered in Washington, DC by industry. Each page lists up to 25 of the biggest by headcount range, what they do and how big they are.

## Key takeaways

- Each page lists up to 25 of the biggest companies in one industry.
- Sizes are ranges, never exact headcounts.
- Ask your AI agent to use www.enrich.chat to find the people at any of them.

## Frequently asked questions

### How are the companies chosen?

Companies shown have a working website that matches their name and list Washington, DC as their headquarters. The biggest by headcount range come first.