Historical LSAT Score Averages: A 30-Year Overview
National mean LSAT score stability since the 1990s
Despite the perception that the test has become fundamentally different, the national mean LSAT score has remained remarkably stable since the early 1990s. Data from the Law School Admission Council indicates that the mean score consistently hovers around the 151–152 mark. This stability is a direct result of the Equating Process, a statistical method used to ensure that scores across different test forms are comparable. Even as the pool of test-takers fluctuates in size—from the surges of the early 2000s to the post-2010 decline and the recent "Trump Bump" in applications—the central tendency of the curve remains anchored. For a candidate, this means that the 50th percentile rank has maintained a consistent relationship with a scaled score of approximately 152 for over thirty years.
Comparing decade-by-decade averages and distributions
When looking at the LSAT scores over time 10 year trend, we observe that while the mean is stable, the variance within the distribution has shifted. In the 1990s and early 2000s, the distribution followed a more traditional bell curve with thinner tails at the extreme ends. However, the last decade has seen a noticeable thickening of the upper tail. This phenomenon suggests that while the "average" student performs similarly to their predecessors, the cohort of high-achieving students has grown larger. This shift is often attributed to the professionalization of LSAT prep. The Standard Error of Measurement (SEM), which usually sits around 2.6 points, remains a constant factor in how LSAC reports scores, but the density of students scoring within one SEM of the 170-mark has increased relative to previous decades.
The myth of "score inflation" vs actual data
There is a common misconception that the LSAT is suffering from the same type of inflation seen in undergraduate grades. However, true LSAT percentile inflation analysis reveals a more complex reality. Unlike a GPA, which can rise indefinitely toward a 4.0 ceiling, the LSAT is a zero-sum game in terms of percentiles. A 170 cannot represent the 99th percentile if 5% of the population achieves it. When we see more 170+ scores, the percentile rank associated with those scores actually drops. Therefore, "inflation" on the LSAT isn't a lowering of standards, but rather a concentration of high-performing individuals. This forces law schools to look deeper into the Raw Score Conversion Information to distinguish between candidates who might have identical scaled scores but different levels of accuracy on the most difficult logical reasoning questions.
Top-Tier Law Schools: The Dramatic Rise in 75th Percentile Scores
In the early 2000s, a 170 was often the 75th percentile score for several schools in the Top 14 (T14). Today, that same 170 is frequently below the 25th percentile at the most elite institutions. The average LSAT score for admitted students trends shows that schools like Yale, Harvard, and Stanford now boast medians of 173 to 175. This three-to-five-point jump over 20 years represents a massive shift in difficulty for applicants. Because the LSAT scale is ordinal and not interval, moving from a 170 to a 175 is significantly more difficult than moving from a 150 to a 155, as it requires moving from the 97th percentile to the 99.5th percentile.
Factors driving the elite score arms race
This "arms race" is primarily driven by the weight given to LSAT medians in law school rankings. Admissions committees are incentivized to prioritize high LSAT scores to protect or improve their standing. Furthermore, the LSAT Flex and the transition to digital testing provided more flexible testing windows, allowing candidates to retake the exam more easily. The removal of the limit on how many times a student can take the test within a certain period (which has varied over the years) has allowed high-achieving students to "score hunt" until they hit their peak potential, thereby driving up the medians at schools that only report the highest score to the American Bar Association (ABA).
Impact on admissions chances for high-but-not-perfect scores
The rising medians have created a "squeeze" for candidates who score in the 165–169 range. Historically, these scores were golden tickets to the lower T14 or top-20 schools. In the current climate, these scores are increasingly viewed as "splitter" territory—where a candidate's LSAT is below the median, requiring an exceptionally high GPA to compensate. This has led to a higher volume of Addendum filings where students explain why their score does not reflect their potential, though the statistical reality remains that the LSAT is the single most predictive factor in the admissions formula. Candidates must now recognize that a 90th percentile score, while objectively excellent, may be functionally non-competitive at the nation's top five programs.
Score Distribution Trends: Compression at the High and Low Ends
Increase in 170+ scores: prevalence and causes
Recent years have seen a statistically significant increase in the volume of test-takers scoring 170 or higher. This is not necessarily evidence that the test is easier, but rather that the methodology for tackling Analytical Reasoning (Logic Games) and Logical Reasoning has been perfected by the prep industry. The ubiquity of "7Sage-style" logic game explanations and "Loophole" logical reasoning strategies has effectively raised the floor for high-end performers. When more students master the formal logic required to "perfect" the games section, the distribution curve experiences compression at the top, making the margin for error between a 172 and a 177 incredibly thin—often a matter of just two or three raw questions.
Decline in very low scores (below 140): the self-selection effect
Conversely, the number of students scoring below 140 has seen a downward trend. This is largely due to the availability of free or low-cost diagnostic tools, such as the Khan Academy LSAT partnership. In previous decades, many students walked into the exam "cold." Today, most candidates take at least one Diagnostic Test. If a student performs poorly on the diagnostic and realizes the amount of work required to reach a viable score, they are more likely to opt out of the official administration entirely. This self-selection bias removes the bottom of the curve, effectively shifting the entire test-taking population toward a more prepared baseline.
What the changing distribution means for percentile accuracy
As the pool of test-takers becomes more prepared, the Percentile Rank associated with a specific scaled score can become more volatile. For example, a 165 might represent the 92nd percentile one year and the 89th the next. While the scaled score (120–180) is what law schools report, the percentile rank is what tells the true story of a candidate's standing against their peers. Current LSAT score distribution trends suggest that the "value" of a mid-160s score is slightly lower than it was a decade ago, simply because there are more people occupying that space on the curve. Candidates must monitor the LSAC Interpretive Guide issued each year to understand how their scaled score translates to the current competitive landscape.
The Equating Process: Why Raw Difficulty Doesn't Dictate Scaled Scores
How LSAC maintains a consistent 120-180 scale across test forms
A common question among test-takers is: "Is the LSAT getting harder over the years?" The answer is technically no, due to the Equating Process. Every LSAT form contains an "experimental" section that does not count toward the score but is used to pre-test questions for future exams. LSAC uses Item Response Theory (IRT) to determine the difficulty of every question. If a particular test form is found to be exceptionally difficult, the "curve" or Raw Score Conversion Table is adjusted so that a lower raw score (number of correct answers) still results in the same scaled score. This ensures that a 160 earned in 2010 represents the same level of proficiency as a 160 earned in 2024.
Examples of how a "hard" test and an "easy" test yield the same scaled scores
Consider two different administrations. In the first, the Logic Games section is straightforward, but the Reading Comprehension is dense and abstract. In the second, the games are notoriously difficult (reminiscent of the famous "Computer Virus" or "Mauve Dinosaurs" games), but the Logical Reasoning is simpler. On the "harder" test, a student might only need 72 correct answers to achieve a 170. On the "easier" test, that same student might need 76 correct answers for a 170. This Equating ensures that the test-taker is not penalized for the luck of the draw regarding which test form they receive on a Saturday morning in June versus October.
Misinterpreting score trends as difficulty changes
When students see rising medians at law schools, they often falsely conclude that the test has become easier to score well on. In reality, the test's Psychometric Properties are designed to prevent this. The rising scores are a reflection of a smarter, more prepared applicant pool, not a more lenient grading scale. If the test were genuinely getting easier, we would see the national mean rise significantly above 152, which has not happened. The difficulty of the LSAT is relative; as the "average" student gets better at identifying Necessary Assumption vs. Sufficient Assumption questions, the test remains just as hard to master because the scale adjusts to the population’s performance over time.
Correlating Trends: LSAT Scores vs Undergraduate GPA Inflation
There is a documented correlation between the rise in undergraduate GPAs (UGPA) and the rise in LSAT scores among law school matriculants. As grade inflation makes a 3.8 GPA the new "average" at many elite universities, law schools have leaned more heavily on the LSAT to differentiate between candidates. This has created a symbiotic trend where both halves of the Academic Index—the formula many schools use to combine GPA and LSAT—are trending upward. For an applicant, this means that having a high GPA is no longer a "plus" but a baseline requirement, making the LSAT the primary tool for actually "breaking away" from the pack.
Debate: are applicants smarter or just better prepared?
Psychometricians often debate whether the upward trend in top-tier scores is a result of the Flynn Effect (the observed rise in IQ scores over generations) or simply better test prep. The evidence leans heavily toward the latter. The LSAT is a test of logic and reading, skills that are highly coachable. The shift from paper-and-pencil to digital testing has also allowed for more data-driven prep. Students can now use analytics to identify that they struggle specifically with Parallel Flaw questions or Science-based Reading Passages, allowing for targeted improvement that was nearly impossible when using only physical books and a stopwatch.
The LSAT as a counterbalance to GPA inflation
Ultimately, the LSAT serves as the "great equalizer." Because a 4.0 at a small liberal arts college is not the same as a 4.0 in a rigorous engineering program at a state university, the LSAT provides a standardized metric. Historical trends show that even as GPAs have inflated across the board, the LSAT has maintained its Predictive Validity for first-year law school performance (1L GPA). This is why, despite the rising scores, the LSAT remains the most important component of the application. It is the only metric that hasn't succumbed to the subjective "softening" of standards seen in higher education.
Modern Prep Industry's Impact on Historical Averages
The most significant driver of the change in historical LSAT score averages is the evolution of the prep industry. In the 1990s, preparation was largely limited to expensive in-person classes or self-study with a handful of released exams. Today, digital platforms offer Adaptive Learning algorithms that tailor the curriculum to the student's weaknesses. These platforms use enormous databases of past questions to show students exactly how often certain question types appear. This democratization of high-level strategy has made it possible for a wider range of students to achieve scores that were once reserved for those who could afford private tutoring.
How access to released past exams has changed preparation
In the early years of the LSAT, there were very few PrepTests available for study. Now, there are nearly 100 officially released exams. This allows modern students to engage in "deep work" by seeing every possible iteration of a Logic Game or every variation of a Strengthen/Weaken question. The ability to practice on the exact interface used on test day (LawHub) has also reduced the "test-day anxiety" factor that historically suppressed scores. When students can simulate the testing environment perfectly 20 or 30 times before the actual exam, the likelihood of a performance "floor" dropping out is greatly reduced.
Quantifying the average score lift from commercial prep courses
While LSAC does not officially endorse the "score lift" claims of private companies, independent data suggests that structured preparation can move a student’s score by 10 to 20 points from their initial diagnostic. This is a massive shift compared to the 3-to-5-point gains typical of 30 years ago. This "lift" is what has caused the compression at the 170+ range. If the "natural" talent pool for a 170 is 2% of the population, but prep can move another 3% of the population into that range, the competition for spots at schools like Harvard or Yale becomes exponentially more difficult, regardless of the test's raw difficulty.
Strategic Implications for Current Test-Takers
For today’s test-taker, looking at historical LSAT score averages from 2015 or earlier is a recipe for failure. An applicant aiming for a Top-20 school must look at the 509 Required Disclosures from the most recent admission cycle. If a school’s median has moved from a 166 to a 170 in five years, the 166 is no longer a safe target; it is a "reach" score. Candidates must set their "floor" score at the current median of their target schools and their "target" at the 75th percentile to remain competitive in a landscape where many applicants are applying with identical, high-quality credentials.
How to interpret your score within the current competitive landscape
When you receive your score, you must look at the Score Report alongside the current year’s percentile table. If you score a 160, you are roughly in the top 20% of test-takers. While this is objectively strong, you must realize that you are competing against a pool that is more "top-heavy" than ever before. In a year with high applicant volume, a 160 might only get you into a school ranked 60th to 80th, whereas in a low-volume year, that same score might have opened doors in the top 50. Understanding these macro-trends helps in deciding whether to settle for a score or use one of your LSAT Takes for a retake.
The importance of percentile rank over raw scaled score
Ultimately, the scaled score is for the law schools, but the percentile rank is for the candidate. The percentile rank tells you how many people you "beat." Because law school is a competitive entry system, your relative position on the curve matters more than the number itself. If the number of 170+ scores continues to grow, the "value" of a 170 will continue to decline in the eyes of admissions officers. Current test-takers should focus on reaching the highest possible percentile, often by mastering the Logic Games (while they are still part of the exam) or perfecting Reading Comprehension nuances, as these are the areas that currently separate the 170-scorer from the 175-scorer.