Updated May 2025 · USCIS quarterly data (2023)
Immigration Blog
VisaTracker's research archive collects data-driven articles on U.S. immigration, drawing on public USCIS, DHS, DOL, and State Department records covering 8 visa categories and 198 sending countries. Articles surface what the numbers actually say about processing times, backlogs, lottery odds, and country-by-country patterns — without crossing into immigration advice.
What This Blog Covers
Articles fall into four categories. Process explainers walk through the mechanics of the most common visa pathways — the H-1B lottery and petition, the EB-2 and EB-3 employment-based green card categories, the EB-5 investor program, asylum procedures, and the various work-authorization documents that USCIS issues. Data analyses surface patterns in public USCIS and DHS records: country-by-country application volumes, processing-time movement across service centers, year-over-year green card approval shifts, and the dominant visa types for top sending countries. Backlog and wait-time pieces translate the U.S. Department of State Visa Bulletin into practical "how long am I waiting" answers for the per-country numerical caps under the Immigration and Nationality Act. Reference guides map out every USCIS form type, the difference between immigrant and non-immigrant categories, and how field-office wait times vary across the country.
Every article cites the underlying USCIS, DHS, DOL, or State Department data and links to the relevant visa-category page, country profile, or field-office page on VisaTracker. For policy guidance directly from the agencies, the USCIS website, the U.S. Department of Labor, the DHS Yearbook of Immigration Statistics, and the State Department Bureau of Consular Affairs are the authoritative upstream sources.
How These Articles Are Researched
Each article begins with a question that real applicants, employers, attorneys, or researchers might Google — "how long does the I-485 take," "what are the H-1B lottery odds this year," "which countries dominate green card approvals," "what is the difference between EB-2 and EB-3." We pull the relevant slice of USCIS quarterly data and DHS Yearbook tables, compute the medians, percentiles, and trend lines that answer the question, and cross-check against the U.S. Department of State Visa Bulletin where per-country availability matters. Findings are written in plain English with the underlying numbers visible in tables. Where we are summarizing agency policy — for example, eligibility rules for EB-5 investor visas, the 60-day grace period after termination on H-1B, or asylum filing requirements — we link to the source agency guidance and recommend readers confirm any specific situation with a licensed immigration attorney. Read the full VisaTracker methodology for details on data cleaning, edge cases, and refresh cadence.
Articles
May 2, 2025
H-1B Visa Process: A Complete Step-by-Step Guide
Every step of the H-1B visa process from employer registration to approval, with current processing times, costs, and lottery data from USCIS.
May 11, 2025
The Green Card Backlog: How Long Each Country Waits
The green card backlog by country and category, with estimated wait times for India, China, Philippines, and Mexico from the latest visa bulletin data.
May 20, 2025
Immigration to the US by Country: 2025 Data
Which countries send the most immigrants to the US in 2025, with data on visa types, green card approvals, and year-over-year changes by country of origin.
May 29, 2025
USCIS Processing Times: Current Wait Times by Form Type
Current USCIS processing times for every major form type including I-130, I-485, I-140, N-400, and more, with trends and which service centers are fastest.
June 6, 2025
US Visa Categories Explained: Every Type from A to V
A comprehensive reference guide to every US visa category from A-1 diplomatic visas to V visas for spouses of permanent residents, with current issuance data.
June 15, 2025
H-1B Lottery Odds: Your Real Chances of Being Selected
The actual odds of being selected in the H-1B lottery based on registration numbers, caps, and historical selection rates from USCIS data.
June 23, 2025
EB-5 Investor Visa Guide: Requirements, Costs, and Timeline
Complete guide to the EB-5 immigrant investor visa covering minimum investment amounts, TEA designations, regional centers, and current processing time data.
July 1, 2025
Immigration Trends Over the Last Decade: What the Data Shows
Ten years of immigration data trends covering visa issuances, green card approvals, enforcement actions, and demographic shifts from DHS and State Department data.
July 10, 2025
Work Authorization in the US: Every Type Explained
Every type of US work authorization from EADs to visa-specific permits, covering eligibility, application process, and processing time data from USCIS.
July 28, 2025
USCIS Field Office Wait Times: Which Offices Are Fastest
Processing times compared across USCIS field offices nationwide. Find out which offices process cases fastest and which have the longest wait times.
July 19, 2025
The Asylum Process Explained: Steps, Timeline, and Data
How the US asylum process works from filing to decision, including affirmative vs defensive asylum, processing times, grant rates by nationality, and recent changes.
Frequently Asked Questions
Where does the data behind these articles come from?
Every chart and statistic in VisaTracker articles is sourced from public U.S. government data: USCIS quarterly performance reports for adjudication times and approval rates, the DHS Office of Homeland Security Statistics Yearbook of Immigration Statistics for historical and demographic context, the U.S. Department of State Bureau of Consular Affairs Visa Bulletin for priority dates and per-country availability, and the U.S. Department of Labor for upstream employment-based labor certifications. The current dataset covers 8 USCIS form types and 198 sending countries.
Are these articles giving immigration advice?
No. VisaTracker articles surface public USCIS, DHS, DOL, and State Department data and explain what the numbers mean in general terms. They are not legal or immigration advice and should not be used as a substitute for guidance from a licensed immigration attorney or an accredited representative recognized by the U.S. Department of Justice. Articles that explain the H-1B process, green card categories, asylum procedures, or country-specific backlogs describe the general framework but cannot account for individual eligibility, beneficiary qualifications, or petition-specific factors.
How often is this blog updated?
New articles publish on a roughly weekly cadence. Underlying data refreshes whenever USCIS publishes its next quarterly performance report or DHS publishes a new Yearbook edition; the current dataset was last refreshed May 2025. Older articles are updated in-place when underlying numbers shift after a USCIS or DHS release, with revision dates noted on each piece.
Why do processing times for the same visa category vary across articles?
USCIS publishes processing times monthly, and they shift with adjudicator capacity, policy changes, and receipt volumes. An article written in one quarter may cite a different processing window than an article written six months later, even for the same form type. Articles that quote a specific number include the publication date so readers can cross-check against the latest USCIS posting on uscis.gov. The country-specific backlog under the visa bulletin moves on a similar monthly cadence and is the responsibility of the U.S. Department of State.
Can I cite a VisaTracker article in my own research?
Yes. VisaTracker analyses build on U.S. government public-domain data and are free to cite with attribution. Cite the underlying data source (USCIS, DHS, State Department, or DOL) for the raw numbers and credit "VisaTracker, with data from [agency]" when quoting our composite analysis. The DHS Yearbook of Immigration Statistics and the USCIS Immigration & Citizenship Data page are the authoritative upstream archives for historical baselines.
VisaTracker's research archive collects data-driven articles on U.S. immigration, drawing on public USCIS, DHS, DOL, and State Department records covering 8 visa categories and 198 sending countries. Articles surface what the numbers actually say about processing times, backlogs, lottery odds, and country-by-country patterns — without crossing into immigration advice.