An introduction paragraph opens an essay in three moves: a hook that earns attention, context that frames the topic, and a thesis that states the claim or focus the essay will develop. Most run three to five sentences, with the thesis last. Twelve introduction examples by essay type, plus what to avoid in the first line, follow below.
introduction paragraph
How to Write an Introduction Paragraph: Hook, Context and Thesis, With 12 Examples
On this page
- What an introduction paragraph has to do
- How to start an essay: the first sentence
- Context: the sentences between the hook and the thesis
- The thesis sentence: where it goes and how long it is
- 12 introduction paragraph examples by essay type
- How long an introduction should be
- Essay starters: sentence openers for the first line
- Write the introduction last, then check it
- When the introduction is easy and the essay is not
What an introduction paragraph has to do
An introduction paragraph's job is to move a reader from not caring about your topic to understanding exactly what you will argue or explain, in a paragraph — never longer, regardless of the essay's total length. It is the first thing a grader reads and where most rubrics first check for a clear direction. The full essay-writing process covers where the introduction fits among the other steps, from prewriting to a final proofread.
The structure for an introduction paragraph: hook, context, thesis
| Part | Job | Typical length |
|---|---|---|
| Hook | Earns the reader's attention in the first sentence | 1 sentence |
| Context | Frames the topic and narrows toward the claim | 1–3 sentences |
| Thesis | States the essay's claim or focus | 1 sentence, usually last |
This essay introduction structure is the one most US rubrics grade against, in that fixed order: a reader should never meet the thesis before the context that explains why it matters.
How to start an essay: the first sentence
How to start an essay comes down to the first sentence doing real work instead of stalling — hooks for essays, generated from your topic can draft a few options if you want to compare before picking one by hand.
Five openings that work
A specific statistic or fact: "In 1956, the United States began building 41,000 miles of highway without a single national vote on where the roads would go."
A brief, concrete scenario: "A driver leaving Chicago for Denver in 1954 faced a patchwork of two-lane roads; the same drive today runs almost entirely on interstate highway."
A sharp claim the essay will defend: "Cities should require protected bike lanes on any street with a bus route, because the combination of bus and car traffic makes those streets the most dangerous ones an ordinary cyclist rides."
A relevant quotation, attributed: a documented line from a real, named source relevant to the topic — never an invented quote attached to a real person.
A precise definition, used to complicate rather than announce: "Food insecurity is not the same as hunger, though the two are often used interchangeably" opens by correcting an assumption, not reciting a dictionary entry.
Openings that lose the reader
A dictionary definition ("Webster's defines success as…") reads as a stalling tactic graders recognize instantly. A "since the dawn of time" opener promises a scope the essay cannot deliver and wastes the sentence that should be doing the most work. An unanswered rhetorical question ("Have you ever wondered how highways get built?") asks the reader to do work the writer should be doing. All three are common enough that an instructor reading thirty essays reads the same line three or four times.
Context: the sentences between the hook and the thesis
Context narrows from the hook's specific moment to the general topic, then narrows again toward the claim the thesis will state — one to three sentences answering "why does this matter right now" without yet stating the position. A context sentence that is too broad ("Throughout history, technology has changed society") repeats the dawn-of-time problem one line later; one that is too narrow skips straight to evidence that belongs in a body paragraph instead. The right width names the specific debate, gap or question the thesis is about to answer, and nothing more.
The thesis sentence: where it goes and how long it is
The thesis is the introduction's last sentence in nearly every US academic format, arriving after the hook and context have earned it rather than opening the paragraph. It runs one sentence, rarely more than 30 to 40 words, and states the essay's claim or focus specifically enough that a reader could restate what the essay will argue after reading only that sentence. Writing the thesis sentence itself covers the formula and worked examples by essay type in full.
12 introduction paragraph examples by essay type
These twelve essay introduction examples are composites that cover the shapes you are most likely to be assigned — check which essay type you were assigned first if the prompt's verb is not obvious. The last block holds short essay introduction examples, for a 300-word essay and a timed exam, which stay short on purpose. Two are introductions for argumentative essays, opening with a statistic and a scenario; a full rhetorical analysis walkthrough builds its own introduction differently, covered further down this page. No college-application introduction appears here — that format has its own conventions on the admissions pages.
Argumentative and persuasive introductions
Argumentative (statistic hook): "Last year, a cyclist was killed on Elm Street two blocks from a bus stop with no protected lane in either direction. Deaths like that one are not rare: the National Highway Traffic Safety Administration counted more than 1,100 cyclists killed in US traffic crashes in 2023. Elm Street has what makes a street dangerous to ride: a bus route alongside ordinary car traffic. Cities should require protected bike lanes on every street that carries a bus route."
Argumentative (scenario hook): "A parent picking up a prescription at 9 p.m. in a small town without a 24-hour pharmacy has one option: drive forty minutes to the nearest city. For a patient without a car, that drive is the whole problem. Rural pharmacies have been closing for years, and state health policy has not kept pace. States should subsidize rural pharmacy operations the way they already subsidize rural hospitals."
Persuasive: "Homework beyond two hours a night does not make students learn more — it makes them sleep less, and sleep loss is where the real damage happens. A worksheet finished at midnight buys less learning than the sleep it replaced. Districts capping nightly homework at two hours are not lowering standards; they are protecting the rest that the next day's learning depends on."
Margin noteNote: All three open with a specific fact or scenario, never a definition; the statistic names its source and year, and each thesis takes a position a reader could reasonably reject.
Expository, compare and contrast, and literary analysis introductions
Expository: "In 1956, the United States began building 41,000 miles of highway without a single national vote on where the roads would go. Those routes decided which towns grew and which ones the new highways bypassed. Three forces shaped the system that resulted: military logistics planning, postwar suburban growth, and a funding formula that rewarded speed of construction over local input."
Compare and contrast: "Solar and wind power are both mature renewable technologies, but a city choosing between them should weigh reliability as heavily as cost, because the two fail in opposite weather. A cloudy week silences a solar array; a still week silences a wind farm. Understanding how each handles cost, reliability and land use explains why most utility planners now favor a mix over either one alone."
Literary analysis: "The green light at the end of Daisy's dock is mentioned in only three chapters of The Great Gatsby, yet it carries more of the novel's argument about the American Dream than any of Gatsby's parties. Nick first sees Gatsby reaching toward it across the dark water of the bay. Fitzgerald uses the light's shifting meaning — hope, distance, then illusion — to track Gatsby's dream from possible to impossible."
Margin noteNote: The expository and compare-and-contrast theses preview the essay's structure; the literary-analysis thesis makes an arguable claim about the text, not a plot summary.
Rhetorical analysis, narrative, and research-paper introductions
Rhetorical analysis: "Martin Luther King Jr.'s 'I Have a Dream' speech builds its final movement almost entirely on anaphora, repeating 'I have a dream' eight times in the speech's final minutes. Each repetition opens a new image, from the red hills of Georgia to his four children. That repetition is not ornamental: it gives an unscripted-sounding speech a structure a live audience can feel building toward its climax."
Narrative: "The stove had been off for twenty minutes before I noticed the smoke alarm wasn't the smoke alarm at all — it was my grandmother's old kitchen timer, still going off in the drawer where she'd left it three years earlier. I hadn't opened that drawer since the funeral. I opened it that night, and the timer was only the first thing I found."
Research paper: "Curbside composting has spread to a growing number of US cities over the past decade, yet participation rates vary widely between comparable cities with similar programs. Some programs collect a large share of household food scraps; others collect little beyond yard waste. This paper examines three factors — bin design, collection frequency, and public communication — that explain most of that variation."
Margin noteNote: The rhetorical-analysis introduction names the specific device (anaphora) instead of a vague "the speaker uses many techniques," and the research-paper thesis previews the factors the paper examines, matching the explanatory pattern.
Cause and effect, a short essay, and a timed-exam introduction
Cause and effect: "A barrier island is built to move, but many now lose sand faster than it returns. Coastal erosion along barrier islands accelerates for three connected reasons: rising sea levels, dune-grass removal for construction, and jetties that interrupt the longshore drift that once redeposited sand. Each cause compounds the other two, which is why no single fix has slowed the erosion on its own."
Short essay (around 300 words): "Public libraries lost their card catalogs decades ago, yet the Institute of Museum and Library Services still counts about 9,000 public library systems across the United States. Public libraries remain essential because they provide free internet access, professional research help, and a physical commons that private platforms cannot offer."
Timed exam: "Two theories explain why empires collapse: overextension and internal inequality. The fall of the Western Roman Empire shows both at once, and separating which factor did more damage clarifies what modern parallels are worth taking seriously."
Margin noteNote: The short essay's thesis previews exactly three reasons to fit a tight word count, and the timed-exam opening skips a scene-setting hook entirely — under time pressure, a direct claim in sentence one is safer than a slow build.
How long an introduction should be
An introduction runs about 50–75 words in a 500-word essay, 100–130 in a 1,000-word essay, and 150–300 from 2,000 words up.
| Essay length | Introduction length |
|---|---|
| 500 words | 2–3 sentences, about 50–75 words |
| 1,000 words | 3–4 sentences, about 100–130 words |
| 2,000 words | 4–6 sentences, about 150–200 words |
| 3,000+ words | 5–8 sentences, about 200–300 words, sometimes its own short section |
An introduction that runs much longer than these bands has usually drifted into evidence that belongs in the first body paragraph instead.
Essay starters: sentence openers for the first line
These essay starters are sentence patterns, not finished lines — fill in your own specific fact, scenario or claim.
Statistic or fact: "In [year], [surprising fact]." · "[Number] out of every [number] [group] [fact]." · "Since [year], [measurable change]." · "According to [named source], [fact], which matters because [reason]."
Scenario: "Imagine [specific situation]." · "[A person or role] faces a choice: [option A] or [option B]." · "On [date or event], [specific thing happened]." · "Every [day or week], [a person or role] [routine that shows the problem]."
Claim: "[Subject] should [action], because [reason]." · "The real problem with [topic] is not [common assumption] — it is [actual claim]." · "Most discussions of [topic] miss [overlooked factor]."
Definition that complicates: "[Term] is not the same as [related term], though the two are often confused." · "[Term], properly defined, excludes [common misconception]." · "Most people use [term] to mean [everyday sense]; in [field], it means [precise sense]."
Quotation: "When [named source] wrote that '[quote],' [they or it] captured [what it reveals about the topic]." · "[Named source]'s line '[quote]' is usually read as [common reading], but [your reading]."
Question that gets answered immediately: "Why did [event] happen? [One-sentence answer], and the reasons matter beyond this one case." · "What would change if [condition]? [One-sentence answer]."
Write the introduction last, then check it
One of the most useful rules for how to write an essay introduction is to write it last: many experienced writers draft it after the body paragraphs, once they know what the essay actually proved rather than what they expected it to argue. Writing it last also makes the thesis easier to state precisely, since it describes a finished argument instead of predicting one.
Introduction checklist
Score the draft free, and a conclusion that answers the introduction closes the loop the thesis opens here.
When the introduction is easy and the essay is not
A strong opening does not write the other four paragraphs. If the rest of the essay is the harder part, GradeDraft writers can take it from your prompt and thesis, at a fixed price agreed before any work starts, through a subject-matched writer for the whole essay. The essay desk's services cover every essay type this page's examples touched.
Send your prompt and thesis, and GradeDraft quotes a fixed price before a writer starts — nothing paid upfront, and an invoice only after you approve the delivered draft.
Get the whole essay writtenFAQ
Essay introduction questions
Replies within 2 hours, 8 am–11 pm ET, 7 days a week
01How do you start an essay?
Open with a hook specific enough that no other essay on the topic could use it — a fact, a brief scenario or a sharp claim — then add context that narrows toward your position, and close the paragraph with a thesis. Avoid a dictionary definition, a "since the dawn of time" opener or a rhetorical question the essay never answers directly.
02How long should an introduction paragraph be?
Length scales with the essay: about 50 to 75 words for a 500-word essay, 100 to 130 words for a 1,000-word essay, and up to 200 to 300 words for a 3,000-word or longer paper. An introduction that runs much past these bands has usually drifted into evidence that belongs in the first body paragraph.
03Can you start an essay with a question?
Yes, but only one the essay answers directly and immediately — not a rhetorical question left hanging while the paragraph moves on. "Why did the interstate highway system take the shape it did?" works as an opener only if the next sentence or two actually answers it, rather than assuming the reader will keep reading to find out.
04Does the thesis go at the end of the introduction?
In nearly every US academic format, yes — the thesis is the introduction's last sentence, arriving after the hook and context have earned it. Some narrative and reflective essays delay the thesis further, letting the story's significance emerge near the essay's end, but for argumentative, expository and analytical essays, place it last in the opening paragraph unless your rubric specifies otherwise.
05What should an introduction not include?
Skip a dictionary definition, a claim the essay does not actually defend, evidence detailed enough to belong in a body paragraph, and any statistic or quotation you have not verified. An introduction previews the essay; it does not argue the essay's full case in miniature before the body paragraphs arrive.