⚡ Semantic Markup in the United States

Semantic markup is code added to web pages to describe the meaning of content elements and their relationships, giving search engines and other systems clearer context beyond visual layout.

The United States of America (USA) is a North American country with a population of over 341 million people.

According to our research, semantic markup technologies are used on 71.6% of websites from the United States.

⭐ Most Popular in 2026

The following chart shows the top semantic markup technologies in the United States in 2026, based on market share.

The most popular is ARIA with an impressive share of 91%, followed by Open Graph with 72.7% and Twitter Cards with 58.1%.

ARIA 91%
Open Graph 72.7%
Twitter Cards 58.1%
JSON-LD 57.9%
oEmbed 43.8%
SearchAction 39.3%
Microdata 23.5%
Microformats 5.8%
Dublin Core 1.3%
RDFa 0.9%
Product Ontology 0.3%
Microformats2 0.1%
GoodRelations 0.04%
e-GMS <0.001%

🚀 Highlights

Here is a list of the top technologies that are more popular in the United States than worldwide.
Differences between global and country rankings are shown in parentheses.

11. Product Ontology ^(-1)

✨ Best Semantic Markup Technologies

Below is a more detailed list of 14 semantic markup technologies used on sites from the United States, ranked by their market share.

Rank	Name	Market share
1	ARIA Cambridge, Massachusetts, United States A W3C technical specification that defines how to improve the accessibility of web content and applications, particularly those with dynamic interfaces and custom controls.	91%
2	Open Graph Menlo Park, California, United States A web metadata standard that defines how webpages are described as structured objects for use in social graphs and enables their consistent representation.	72.7%
3	Twitter Cards Bastrop, Texas, United States With Twitter Cards, you can attach rich photos, videos and media experiences to tweets, helping to drive traffic to your website.	58.1%
4	JSON-LD Cambridge, Massachusetts, United States A lightweight linked data format used to embed structured data into web pages.	57.9%
5	oEmbed A format for allowing an embedded representation of a URL on third party sites.	43.8%
6	SearchAction Cambridge, Massachusetts, United States A structured data type from Schema.org that describes a website's search capability.	39.3%
7	Microdata Cambridge, Massachusetts, United States An HTML specification that is used to nest metadata within a document, in parallel with the existing content.	23.5%
8	Microformats A set of defined HTML classes and attributes created to serve as descriptive metadata about an element, representing commonly published things like people, events, blog posts, reviews, and so on.	5.8%
9	Dublin Core A metadata element set used for documents and other objects.	1.3%
10	RDFa Cambridge, Massachusetts, United States An extension to HTML5 that adds attributes to markup things like people, places, events, recipes, and reviews.	0.9%
11	Product Ontology The Product Types Ontology provides 300,000 definitions for types of product or services that extend the schema.org and GoodRelations standards for e-commerce markup.	0.3%
12	Microformats2 A set of defined HTML classes and attributes created to serve as descriptive metadata about an element, representing commonly published things like people, events, blog posts, reviews, and so on.	0.1%
13	GoodRelations A standardized vocabulary for product, price, store, and company data that can be embedded into web pages.	0.04%
14	e-GMS London, United Kingdom A definition of the metadata elements that should be applied to public sector information assets.	<0.001%

👉 See Also

🌎 Semantic Markup in other countries

Data is based on the analysis of 560,647 websites from the United States.
Statistics were last calculated on March 30, 2026.
For details, see our methodology and disclaimer.